summaryrefslogtreecommitdiff
path: root/toolchain
diff options
context:
space:
mode:
authorWaldemar Brodkorb <wbx@openadk.org>2011-10-22 19:26:12 +0200
committerWaldemar Brodkorb <wbx@openadk.org>2011-10-22 19:26:12 +0200
commitd9cd3aca2bf0689374fc71227dd42f629209b868 (patch)
treee7c5164e919210dfd8b1aeb23f6b23cdf0f9bca5 /toolchain
parent2b52e67da00817f93884a344a9a8b7e2c585fc8c (diff)
correct broken patch
Diffstat (limited to 'toolchain')
-rw-r--r--toolchain/gcc/patches/4.4.6/gcc-avr32.patch17372
1 files changed, 357 insertions, 17015 deletions
diff --git a/toolchain/gcc/patches/4.4.6/gcc-avr32.patch b/toolchain/gcc/patches/4.4.6/gcc-avr32.patch
index 0b092c07c..f348cba9c 100644
--- a/toolchain/gcc/patches/4.4.6/gcc-avr32.patch
+++ b/toolchain/gcc/patches/4.4.6/gcc-avr32.patch
@@ -1,6 +1,6 @@
diff -Nur gcc-4.4.6.orig/gcc/builtins.c gcc-4.4.6/gcc/builtins.c
--- gcc-4.4.6.orig/gcc/builtins.c 2010-12-07 19:56:56.000000000 +0100
-+++ gcc-4.4.6/gcc/builtins.c 2011-08-27 19:45:42.559232404 +0200
++++ gcc-4.4.6/gcc/builtins.c 2011-10-22 19:23:08.512581300 +0200
@@ -11108,7 +11108,7 @@
do
@@ -12,7 +12,7 @@ diff -Nur gcc-4.4.6.orig/gcc/builtins.c gcc-4.4.6/gcc/builtins.c
case 0:
diff -Nur gcc-4.4.6.orig/gcc/calls.c gcc-4.4.6/gcc/calls.c
--- gcc-4.4.6.orig/gcc/calls.c 2010-09-24 17:07:36.000000000 +0200
-+++ gcc-4.4.6/gcc/calls.c 2011-08-27 19:45:42.589240794 +0200
++++ gcc-4.4.6/gcc/calls.c 2011-10-22 19:23:08.512581300 +0200
@@ -3447,7 +3447,7 @@
for (; count < nargs; count++)
{
@@ -22,9 +22,309 @@ diff -Nur gcc-4.4.6.orig/gcc/calls.c gcc-4.4.6/gcc/calls.c
/* We cannot convert the arg value to the mode the library wants here;
must do it earlier where we know the signedness of the arg. */
+diff -Nur gcc-4.4.6.orig/gcc/config/avr32/avr32-elf.h gcc-4.4.6/gcc/config/avr32/avr32-elf.h
+--- gcc-4.4.6.orig/gcc/config/avr32/avr32-elf.h 1970-01-01 01:00:00.000000000 +0100
++++ gcc-4.4.6/gcc/config/avr32/avr32-elf.h 2011-10-22 19:23:08.516581300 +0200
+@@ -0,0 +1,91 @@
++/*
++ Elf specific definitions.
++ Copyright 2003,2004,2005,2006,2007,2008,2009 Atmel Corporation.
++
++ This file is part of GCC.
++
++ This program is free software; you can redistribute it and/or modify
++ it under the terms of the GNU General Public License as published by
++ the Free Software Foundation; either version 2 of the License, or
++ (at your option) any later version.
++
++ This program is distributed in the hope that it will be useful,
++ but WITHOUT ANY WARRANTY; without even the implied warranty of
++ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
++ GNU General Public License for more details.
++
++ You should have received a copy of the GNU General Public License
++ along with this program; if not, write to the Free Software
++ Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
++
++
++/*****************************************************************************
++ * Controlling the Compiler Driver, 'gcc'
++ *****************************************************************************/
++
++/* Run-time Target Specification. */
++#undef TARGET_VERSION
++#define TARGET_VERSION fputs (" (AVR32 GNU with ELF)", stderr);
++
++/*
++Another C string constant used much like LINK_SPEC. The
++difference between the two is that STARTFILE_SPEC is used at
++the very beginning of the command given to the linker.
++
++If this macro is not defined, a default is provided that loads the
++standard C startup file from the usual place. See gcc.c.
++*/
++#if 0
++#undef STARTFILE_SPEC
++#define STARTFILE_SPEC "crt0%O%s crti%O%s crtbegin%O%s"
++#endif
++#undef STARTFILE_SPEC
++#define STARTFILE_SPEC "%{mflashvault: crtfv.o%s} %{!mflashvault: crt0.o%s} \
++ crti.o%s crtbegin.o%s"
++
++#undef LINK_SPEC
++#define LINK_SPEC "%{muse-oscall:--defsym __do_not_use_oscall_coproc__=0} %{mrelax|O*:%{mno-relax|O0|O1: ;:--relax}} %{mpart=uc3a3revd:-mavr32elf_uc3a3256s;:%{mpart=*:-mavr32elf_%*}} %{mcpu=*:-mavr32elf_%*}"
++
++
++/*
++Another C string constant used much like LINK_SPEC. The
++difference between the two is that ENDFILE_SPEC is used at
++the very end of the command given to the linker.
++
++Do not define this macro if it does not need to do anything.
++*/
++#undef ENDFILE_SPEC
++#define ENDFILE_SPEC "crtend%O%s crtn%O%s"
++
++
++/* Target CPU builtins. */
++#define TARGET_CPU_CPP_BUILTINS() \
++ do \
++ { \
++ builtin_define ("__avr32__"); \
++ builtin_define ("__AVR32__"); \
++ builtin_define ("__AVR32_ELF__"); \
++ builtin_define (avr32_part->macro); \
++ builtin_define (avr32_arch->macro); \
++ if (avr32_arch->uarch_type == UARCH_TYPE_AVR32A) \
++ builtin_define ("__AVR32_AVR32A__"); \
++ else \
++ builtin_define ("__AVR32_AVR32B__"); \
++ if (TARGET_UNALIGNED_WORD) \
++ builtin_define ("__AVR32_HAS_UNALIGNED_WORD__"); \
++ if (TARGET_SIMD) \
++ builtin_define ("__AVR32_HAS_SIMD__"); \
++ if (TARGET_DSP) \
++ builtin_define ("__AVR32_HAS_DSP__"); \
++ if (TARGET_RMW) \
++ builtin_define ("__AVR32_HAS_RMW__"); \
++ if (TARGET_BRANCH_PRED) \
++ builtin_define ("__AVR32_HAS_BRANCH_PRED__"); \
++ if (TARGET_FAST_FLOAT) \
++ builtin_define ("__AVR32_FAST_FLOAT__"); \
++ if (TARGET_FLASHVAULT) \
++ builtin_define ("__AVR32_FLASHVAULT__"); \
++ if (TARGET_NO_MUL_INSNS) \
++ builtin_define ("__AVR32_NO_MUL__"); \
++ } \
++ while (0)
+diff -Nur gcc-4.4.6.orig/gcc/config/avr32/avr32-modes.def gcc-4.4.6/gcc/config/avr32/avr32-modes.def
+--- gcc-4.4.6.orig/gcc/config/avr32/avr32-modes.def 1970-01-01 01:00:00.000000000 +0100
++++ gcc-4.4.6/gcc/config/avr32/avr32-modes.def 2011-10-22 19:23:08.524581303 +0200
+@@ -0,0 +1 @@
++VECTOR_MODES (INT, 4); /* V4QI V2HI */
+diff -Nur gcc-4.4.6.orig/gcc/config/avr32/avr32-protos.h gcc-4.4.6/gcc/config/avr32/avr32-protos.h
+--- gcc-4.4.6.orig/gcc/config/avr32/avr32-protos.h 1970-01-01 01:00:00.000000000 +0100
++++ gcc-4.4.6/gcc/config/avr32/avr32-protos.h 2011-10-22 19:23:08.524581303 +0200
+@@ -0,0 +1,196 @@
++/*
++ Prototypes for exported functions defined in avr32.c
++ Copyright 2003,2004,2005,2006,2007,2008,2009 Atmel Corporation.
++
++ This file is part of GCC.
++
++ This program is free software; you can redistribute it and/or modify
++ it under the terms of the GNU General Public License as published by
++ the Free Software Foundation; either version 2 of the License, or
++ (at your option) any later version.
++
++ This program is distributed in the hope that it will be useful,
++ but WITHOUT ANY WARRANTY; without even the implied warranty of
++ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
++ GNU General Public License for more details.
++
++ You should have received a copy of the GNU General Public License
++ along with this program; if not, write to the Free Software
++ Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
++
++
++#ifndef AVR32_PROTOS_H
++#define AVR32_PROTOS_H
++
++extern const int swap_reg[];
++
++extern int avr32_valid_macmac_bypass (rtx, rtx);
++extern int avr32_valid_mulmac_bypass (rtx, rtx);
++
++extern int avr32_decode_lcomm_symbol_offset (rtx, int *);
++extern void avr32_encode_lcomm_symbol_offset (tree, char *, int);
++
++extern const char *avr32_strip_name_encoding (const char *);
++
++extern rtx avr32_get_note_reg_equiv (rtx insn);
++
++extern int avr32_use_return_insn (int iscond);
++
++extern void avr32_make_reglist16 (int reglist16_vect, char *reglist16_string);
++
++extern void avr32_make_reglist8 (int reglist8_vect, char *reglist8_string);
++extern void avr32_make_fp_reglist_w (int reglist_mask, char *reglist_string);
++extern void avr32_make_fp_reglist_d (int reglist_mask, char *reglist_string);
++
++extern void avr32_output_return_instruction (int single_ret_inst,
++ int iscond, rtx cond,
++ rtx r12_imm);
++extern void avr32_expand_prologue (void);
++extern void avr32_set_return_address (rtx source, rtx scratch);
++
++extern int avr32_hard_regno_mode_ok (int regno, enum machine_mode mode);
++extern int avr32_extra_constraint_s (rtx value, const int strict);
++extern int avr32_eh_return_data_regno (const int n);
++extern int avr32_initial_elimination_offset (const int from, const int to);
++extern rtx avr32_function_arg (CUMULATIVE_ARGS * cum, enum machine_mode mode,
++ tree type, int named);
++extern void avr32_init_cumulative_args (CUMULATIVE_ARGS * cum, tree fntype,
++ rtx libname, tree fndecl);
++extern void avr32_function_arg_advance (CUMULATIVE_ARGS * cum,
++ enum machine_mode mode,
++ tree type, int named);
++#ifdef ARGS_SIZE_RTX
++/* expr.h defines ARGS_SIZE_RTX and `enum direction'. */
++extern enum direction avr32_function_arg_padding (enum machine_mode mode,
++ tree type);
++#endif /* ARGS_SIZE_RTX */
++extern rtx avr32_function_value (tree valtype, tree func, bool outgoing);
++extern rtx avr32_libcall_value (enum machine_mode mode);
++extern int avr32_sched_use_dfa_pipeline_interface (void);
++extern bool avr32_return_in_memory (tree type, tree fntype);
++extern void avr32_regs_to_save (char *operand);
++extern void avr32_target_asm_function_prologue (FILE * file,
++ HOST_WIDE_INT size);
++extern void avr32_target_asm_function_epilogue (FILE * file,
++ HOST_WIDE_INT size);
++extern void avr32_trampoline_template (FILE * file);
++extern void avr32_initialize_trampoline (rtx addr, rtx fnaddr,
++ rtx static_chain);
++extern int avr32_legitimate_address (enum machine_mode mode, rtx x,
++ int strict);
++extern int avr32_legitimate_constant_p (rtx x);
++
++extern int avr32_legitimate_pic_operand_p (rtx x);
++
++extern rtx avr32_find_symbol (rtx x);
++extern void avr32_select_section (rtx exp, int reloc, int align);
++extern void avr32_encode_section_info (tree decl, rtx rtl, int first);
++extern void avr32_asm_file_end (FILE * stream);
++extern void avr32_asm_output_ascii (FILE * stream, char *ptr, int len);
++extern void avr32_asm_output_common (FILE * stream, const char *name,
++ int size, int rounded);
++extern void avr32_asm_output_label (FILE * stream, const char *name);
++extern void avr32_asm_declare_object_name (FILE * stream, char *name,
++ tree decl);
++extern void avr32_asm_globalize_label (FILE * stream, const char *name);
++extern void avr32_asm_weaken_label (FILE * stream, const char *name);
++extern void avr32_asm_output_external (FILE * stream, tree decl,
++ const char *name);
++extern void avr32_asm_output_external_libcall (FILE * stream, rtx symref);
++extern void avr32_asm_output_labelref (FILE * stream, const char *name);
++extern void avr32_notice_update_cc (rtx exp, rtx insn);
++extern void avr32_print_operand (FILE * stream, rtx x, int code);
++extern void avr32_print_operand_address (FILE * stream, rtx x);
++
++extern int avr32_symbol (rtx x);
++
++extern void avr32_select_rtx_section (enum machine_mode mode, rtx x,
++ unsigned HOST_WIDE_INT align);
++
++extern int avr32_load_multiple_operation (rtx op, enum machine_mode mode);
++extern int avr32_store_multiple_operation (rtx op, enum machine_mode mode);
++
++extern int avr32_const_ok_for_constraint_p (HOST_WIDE_INT value, char c,
++ const char *str);
++
++extern bool avr32_cannot_force_const_mem (rtx x);
++
++extern void avr32_init_builtins (void);
++
++extern rtx avr32_expand_builtin (tree exp, rtx target, rtx subtarget,
++ enum machine_mode mode, int ignore);
++
++extern bool avr32_must_pass_in_stack (enum machine_mode mode, tree type);
++
++extern bool avr32_strict_argument_naming (CUMULATIVE_ARGS * ca);
++
++extern bool avr32_pass_by_reference (CUMULATIVE_ARGS * cum,
++ enum machine_mode mode,
++ tree type, bool named);
++
++extern rtx avr32_gen_load_multiple (rtx * regs, int count, rtx from,
++ int write_back, int in_struct_p,
++ int scalar_p);
++extern rtx avr32_gen_store_multiple (rtx * regs, int count, rtx to,
++ int in_struct_p, int scalar_p);
++extern int avr32_gen_movmemsi (rtx * operands);
++
++extern int avr32_rnd_operands (rtx add, rtx shift);
++extern int avr32_adjust_insn_length (rtx insn, int length);
++
++extern int symbol_mentioned_p (rtx x);
++extern int label_mentioned_p (rtx x);
++extern rtx legitimize_pic_address (rtx orig, enum machine_mode mode, rtx reg);
++extern int avr32_address_register_rtx_p (rtx x, int strict_p);
++extern int avr32_legitimate_index_p (enum machine_mode mode, rtx index,
++ int strict_p);
++
++extern int avr32_const_double_immediate (rtx value);
++extern void avr32_init_expanders (void);
++extern rtx avr32_return_addr (int count, rtx frame);
++extern bool avr32_got_mentioned_p (rtx addr);
++
++extern void avr32_final_prescan_insn (rtx insn, rtx * opvec, int noperands);
++
++extern int avr32_expand_movcc (enum machine_mode mode, rtx operands[]);
++extern int avr32_expand_addcc (enum machine_mode mode, rtx operands[]);
++#ifdef RTX_CODE
++extern int avr32_expand_scc (RTX_CODE cond, rtx * operands);
++#endif
++
++extern int avr32_store_bypass (rtx insn_out, rtx insn_in);
++extern int avr32_mul_waw_bypass (rtx insn_out, rtx insn_in);
++extern int avr32_valid_load_double_bypass (rtx insn_out, rtx insn_in);
++extern int avr32_valid_load_quad_bypass (rtx insn_out, rtx insn_in);
++extern rtx avr32_output_cmp (rtx cond, enum machine_mode mode,
++ rtx op0, rtx op1);
++
++rtx get_next_insn_cond (rtx cur_insn);
++int set_next_insn_cond (rtx cur_insn, rtx cond);
++rtx next_insn_emits_cmp (rtx cur_insn);
++void avr32_override_options (void);
++void avr32_load_pic_register (void);
++#ifdef GCC_BASIC_BLOCK_H
++rtx avr32_ifcvt_modify_insn (ce_if_block_t *ce_info, rtx pattern, rtx insn,
++ int *num_true_changes);
++rtx avr32_ifcvt_modify_test (ce_if_block_t *ce_info, rtx test );
++void avr32_ifcvt_modify_cancel ( ce_if_block_t *ce_info, int *num_true_changes);
++#endif
++void avr32_optimization_options (int level, int size);
++int avr32_const_ok_for_move (HOST_WIDE_INT c);
++
++void avr32_split_const_expr (enum machine_mode mode,
++ enum machine_mode new_mode,
++ rtx expr,
++ rtx *split_expr);
++void avr32_get_intval (enum machine_mode mode,
++ rtx const_expr,
++ HOST_WIDE_INT *val);
++
++int avr32_cond_imm_clobber_splittable (rtx insn,
++ rtx operands[]);
++
++bool avr32_flashvault_call(tree decl);
++extern void avr32_emit_swdivsf (rtx, rtx, rtx);
++
++#endif /* AVR32_PROTOS_H */
diff -Nur gcc-4.4.6.orig/gcc/config/avr32/avr32.c gcc-4.4.6/gcc/config/avr32/avr32.c
--- gcc-4.4.6.orig/gcc/config/avr32/avr32.c 1970-01-01 01:00:00.000000000 +0100
-+++ gcc-4.4.6/gcc/config/avr32/avr32.c 2011-08-27 19:45:59.051740454 +0200
++++ gcc-4.4.6/gcc/config/avr32/avr32.c 2011-10-22 19:23:08.516581300 +0200
@@ -0,0 +1,8087 @@
+/*
+ Target hooks and helper functions for AVR32.
@@ -8113,104 +8413,9 @@ diff -Nur gcc-4.4.6.orig/gcc/config/avr32/avr32.c gcc-4.4.6/gcc/config/avr32/avr
+ }
+ }
+}
-diff -Nur gcc-4.4.6.orig/gcc/config/avr32/avr32-elf.h gcc-4.4.6/gcc/config/avr32/avr32-elf.h
---- gcc-4.4.6.orig/gcc/config/avr32/avr32-elf.h 1970-01-01 01:00:00.000000000 +0100
-+++ gcc-4.4.6/gcc/config/avr32/avr32-elf.h 2011-08-27 19:45:42.679240416 +0200
-@@ -0,0 +1,91 @@
-+/*
-+ Elf specific definitions.
-+ Copyright 2003,2004,2005,2006,2007,2008,2009 Atmel Corporation.
-+
-+ This file is part of GCC.
-+
-+ This program is free software; you can redistribute it and/or modify
-+ it under the terms of the GNU General Public License as published by
-+ the Free Software Foundation; either version 2 of the License, or
-+ (at your option) any later version.
-+
-+ This program is distributed in the hope that it will be useful,
-+ but WITHOUT ANY WARRANTY; without even the implied warranty of
-+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-+ GNU General Public License for more details.
-+
-+ You should have received a copy of the GNU General Public License
-+ along with this program; if not, write to the Free Software
-+ Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
-+
-+
-+/*****************************************************************************
-+ * Controlling the Compiler Driver, 'gcc'
-+ *****************************************************************************/
-+
-+/* Run-time Target Specification. */
-+#undef TARGET_VERSION
-+#define TARGET_VERSION fputs (" (AVR32 GNU with ELF)", stderr);
-+
-+/*
-+Another C string constant used much like LINK_SPEC. The
-+difference between the two is that STARTFILE_SPEC is used at
-+the very beginning of the command given to the linker.
-+
-+If this macro is not defined, a default is provided that loads the
-+standard C startup file from the usual place. See gcc.c.
-+*/
-+#if 0
-+#undef STARTFILE_SPEC
-+#define STARTFILE_SPEC "crt0%O%s crti%O%s crtbegin%O%s"
-+#endif
-+#undef STARTFILE_SPEC
-+#define STARTFILE_SPEC "%{mflashvault: crtfv.o%s} %{!mflashvault: crt0.o%s} \
-+ crti.o%s crtbegin.o%s"
-+
-+#undef LINK_SPEC
-+#define LINK_SPEC "%{muse-oscall:--defsym __do_not_use_oscall_coproc__=0} %{mrelax|O*:%{mno-relax|O0|O1: ;:--relax}} %{mpart=uc3a3revd:-mavr32elf_uc3a3256s;:%{mpart=*:-mavr32elf_%*}} %{mcpu=*:-mavr32elf_%*}"
-+
-+
-+/*
-+Another C string constant used much like LINK_SPEC. The
-+difference between the two is that ENDFILE_SPEC is used at
-+the very end of the command given to the linker.
-+
-+Do not define this macro if it does not need to do anything.
-+*/
-+#undef ENDFILE_SPEC
-+#define ENDFILE_SPEC "crtend%O%s crtn%O%s"
-+
-+
-+/* Target CPU builtins. */
-+#define TARGET_CPU_CPP_BUILTINS() \
-+ do \
-+ { \
-+ builtin_define ("__avr32__"); \
-+ builtin_define ("__AVR32__"); \
-+ builtin_define ("__AVR32_ELF__"); \
-+ builtin_define (avr32_part->macro); \
-+ builtin_define (avr32_arch->macro); \
-+ if (avr32_arch->uarch_type == UARCH_TYPE_AVR32A) \
-+ builtin_define ("__AVR32_AVR32A__"); \
-+ else \
-+ builtin_define ("__AVR32_AVR32B__"); \
-+ if (TARGET_UNALIGNED_WORD) \
-+ builtin_define ("__AVR32_HAS_UNALIGNED_WORD__"); \
-+ if (TARGET_SIMD) \
-+ builtin_define ("__AVR32_HAS_SIMD__"); \
-+ if (TARGET_DSP) \
-+ builtin_define ("__AVR32_HAS_DSP__"); \
-+ if (TARGET_RMW) \
-+ builtin_define ("__AVR32_HAS_RMW__"); \
-+ if (TARGET_BRANCH_PRED) \
-+ builtin_define ("__AVR32_HAS_BRANCH_PRED__"); \
-+ if (TARGET_FAST_FLOAT) \
-+ builtin_define ("__AVR32_FAST_FLOAT__"); \
-+ if (TARGET_FLASHVAULT) \
-+ builtin_define ("__AVR32_FLASHVAULT__"); \
-+ if (TARGET_NO_MUL_INSNS) \
-+ builtin_define ("__AVR32_NO_MUL__"); \
-+ } \
-+ while (0)
diff -Nur gcc-4.4.6.orig/gcc/config/avr32/avr32.h gcc-4.4.6/gcc/config/avr32/avr32.h
--- gcc-4.4.6.orig/gcc/config/avr32/avr32.h 1970-01-01 01:00:00.000000000 +0100
-+++ gcc-4.4.6/gcc/config/avr32/avr32.h 2011-08-27 19:45:42.757981238 +0200
++++ gcc-4.4.6/gcc/config/avr32/avr32.h 2011-10-22 19:23:08.520581302 +0200
@@ -0,0 +1,3316 @@
+/*
+ Definitions of target machine for AVR32.
@@ -11530,7 +11735,7 @@ diff -Nur gcc-4.4.6.orig/gcc/config/avr32/avr32.h gcc-4.4.6/gcc/config/avr32/avr
+#endif
diff -Nur gcc-4.4.6.orig/gcc/config/avr32/avr32.md gcc-4.4.6/gcc/config/avr32/avr32.md
--- gcc-4.4.6.orig/gcc/config/avr32/avr32.md 1970-01-01 01:00:00.000000000 +0100
-+++ gcc-4.4.6/gcc/config/avr32/avr32.md 2011-08-27 19:45:42.807981430 +0200
++++ gcc-4.4.6/gcc/config/avr32/avr32.md 2011-10-22 19:23:08.524581303 +0200
@@ -0,0 +1,5198 @@
+;; AVR32 machine description file.
+;; Copyright 2003,2004,2005,2006,2007,2008,2009 Atmel Corporation.
@@ -16730,14 +16935,9 @@ diff -Nur gcc-4.4.6.orig/gcc/config/avr32/avr32.md gcc-4.4.6/gcc/config/avr32/av
+
+;; Include the FPU for uc3
+(include "uc3fpu.md")
-diff -Nur gcc-4.4.6.orig/gcc/config/avr32/avr32-modes.def gcc-4.4.6/gcc/config/avr32/avr32-modes.def
---- gcc-4.4.6.orig/gcc/config/avr32/avr32-modes.def 1970-01-01 01:00:00.000000000 +0100
-+++ gcc-4.4.6/gcc/config/avr32/avr32-modes.def 2011-08-27 19:45:42.837990082 +0200
-@@ -0,0 +1 @@
-+VECTOR_MODES (INT, 4); /* V4QI V2HI */
diff -Nur gcc-4.4.6.orig/gcc/config/avr32/avr32.opt gcc-4.4.6/gcc/config/avr32/avr32.opt
--- gcc-4.4.6.orig/gcc/config/avr32/avr32.opt 1970-01-01 01:00:00.000000000 +0100
-+++ gcc-4.4.6/gcc/config/avr32/avr32.opt 2011-08-27 19:45:42.877990476 +0200
++++ gcc-4.4.6/gcc/config/avr32/avr32.opt 2011-10-22 19:23:08.524581303 +0200
@@ -0,0 +1,93 @@
+; Options for the ATMEL AVR32 port of the compiler.
+
@@ -16832,209 +17032,9 @@ diff -Nur gcc-4.4.6.orig/gcc/config/avr32/avr32.opt gcc-4.4.6/gcc/config/avr32/a
+mlist-devices
+Target RejectNegative Var(avr32_list_supported_parts)
+Print the list of parts supported while printing --target-help.
-diff -Nur gcc-4.4.6.orig/gcc/config/avr32/avr32-protos.h gcc-4.4.6/gcc/config/avr32/avr32-protos.h
---- gcc-4.4.6.orig/gcc/config/avr32/avr32-protos.h 1970-01-01 01:00:00.000000000 +0100
-+++ gcc-4.4.6/gcc/config/avr32/avr32-protos.h 2011-08-27 19:45:42.937990414 +0200
-@@ -0,0 +1,196 @@
-+/*
-+ Prototypes for exported functions defined in avr32.c
-+ Copyright 2003,2004,2005,2006,2007,2008,2009 Atmel Corporation.
-+
-+ This file is part of GCC.
-+
-+ This program is free software; you can redistribute it and/or modify
-+ it under the terms of the GNU General Public License as published by
-+ the Free Software Foundation; either version 2 of the License, or
-+ (at your option) any later version.
-+
-+ This program is distributed in the hope that it will be useful,
-+ but WITHOUT ANY WARRANTY; without even the implied warranty of
-+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-+ GNU General Public License for more details.
-+
-+ You should have received a copy of the GNU General Public License
-+ along with this program; if not, write to the Free Software
-+ Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
-+
-+
-+#ifndef AVR32_PROTOS_H
-+#define AVR32_PROTOS_H
-+
-+extern const int swap_reg[];
-+
-+extern int avr32_valid_macmac_bypass (rtx, rtx);
-+extern int avr32_valid_mulmac_bypass (rtx, rtx);
-+
-+extern int avr32_decode_lcomm_symbol_offset (rtx, int *);
-+extern void avr32_encode_lcomm_symbol_offset (tree, char *, int);
-+
-+extern const char *avr32_strip_name_encoding (const char *);
-+
-+extern rtx avr32_get_note_reg_equiv (rtx insn);
-+
-+extern int avr32_use_return_insn (int iscond);
-+
-+extern void avr32_make_reglist16 (int reglist16_vect, char *reglist16_string);
-+
-+extern void avr32_make_reglist8 (int reglist8_vect, char *reglist8_string);
-+extern void avr32_make_fp_reglist_w (int reglist_mask, char *reglist_string);
-+extern void avr32_make_fp_reglist_d (int reglist_mask, char *reglist_string);
-+
-+extern void avr32_output_return_instruction (int single_ret_inst,
-+ int iscond, rtx cond,
-+ rtx r12_imm);
-+extern void avr32_expand_prologue (void);
-+extern void avr32_set_return_address (rtx source, rtx scratch);
-+
-+extern int avr32_hard_regno_mode_ok (int regno, enum machine_mode mode);
-+extern int avr32_extra_constraint_s (rtx value, const int strict);
-+extern int avr32_eh_return_data_regno (const int n);
-+extern int avr32_initial_elimination_offset (const int from, const int to);
-+extern rtx avr32_function_arg (CUMULATIVE_ARGS * cum, enum machine_mode mode,
-+ tree type, int named);
-+extern void avr32_init_cumulative_args (CUMULATIVE_ARGS * cum, tree fntype,
-+ rtx libname, tree fndecl);
-+extern void avr32_function_arg_advance (CUMULATIVE_ARGS * cum,
-+ enum machine_mode mode,
-+ tree type, int named);
-+#ifdef ARGS_SIZE_RTX
-+/* expr.h defines ARGS_SIZE_RTX and `enum direction'. */
-+extern enum direction avr32_function_arg_padding (enum machine_mode mode,
-+ tree type);
-+#endif /* ARGS_SIZE_RTX */
-+extern rtx avr32_function_value (tree valtype, tree func, bool outgoing);
-+extern rtx avr32_libcall_value (enum machine_mode mode);
-+extern int avr32_sched_use_dfa_pipeline_interface (void);
-+extern bool avr32_return_in_memory (tree type, tree fntype);
-+extern void avr32_regs_to_save (char *operand);
-+extern void avr32_target_asm_function_prologue (FILE * file,
-+ HOST_WIDE_INT size);
-+extern void avr32_target_asm_function_epilogue (FILE * file,
-+ HOST_WIDE_INT size);
-+extern void avr32_trampoline_template (FILE * file);
-+extern void avr32_initialize_trampoline (rtx addr, rtx fnaddr,
-+ rtx static_chain);
-+extern int avr32_legitimate_address (enum machine_mode mode, rtx x,
-+ int strict);
-+extern int avr32_legitimate_constant_p (rtx x);
-+
-+extern int avr32_legitimate_pic_operand_p (rtx x);
-+
-+extern rtx avr32_find_symbol (rtx x);
-+extern void avr32_select_section (rtx exp, int reloc, int align);
-+extern void avr32_encode_section_info (tree decl, rtx rtl, int first);
-+extern void avr32_asm_file_end (FILE * stream);
-+extern void avr32_asm_output_ascii (FILE * stream, char *ptr, int len);
-+extern void avr32_asm_output_common (FILE * stream, const char *name,
-+ int size, int rounded);
-+extern void avr32_asm_output_label (FILE * stream, const char *name);
-+extern void avr32_asm_declare_object_name (FILE * stream, char *name,
-+ tree decl);
-+extern void avr32_asm_globalize_label (FILE * stream, const char *name);
-+extern void avr32_asm_weaken_label (FILE * stream, const char *name);
-+extern void avr32_asm_output_external (FILE * stream, tree decl,
-+ const char *name);
-+extern void avr32_asm_output_external_libcall (FILE * stream, rtx symref);
-+extern void avr32_asm_output_labelref (FILE * stream, const char *name);
-+extern void avr32_notice_update_cc (rtx exp, rtx insn);
-+extern void avr32_print_operand (FILE * stream, rtx x, int code);
-+extern void avr32_print_operand_address (FILE * stream, rtx x);
-+
-+extern int avr32_symbol (rtx x);
-+
-+extern void avr32_select_rtx_section (enum machine_mode mode, rtx x,
-+ unsigned HOST_WIDE_INT align);
-+
-+extern int avr32_load_multiple_operation (rtx op, enum machine_mode mode);
-+extern int avr32_store_multiple_operation (rtx op, enum machine_mode mode);
-+
-+extern int avr32_const_ok_for_constraint_p (HOST_WIDE_INT value, char c,
-+ const char *str);
-+
-+extern bool avr32_cannot_force_const_mem (rtx x);
-+
-+extern void avr32_init_builtins (void);
-+
-+extern rtx avr32_expand_builtin (tree exp, rtx target, rtx subtarget,
-+ enum machine_mode mode, int ignore);
-+
-+extern bool avr32_must_pass_in_stack (enum machine_mode mode, tree type);
-+
-+extern bool avr32_strict_argument_naming (CUMULATIVE_ARGS * ca);
-+
-+extern bool avr32_pass_by_reference (CUMULATIVE_ARGS * cum,
-+ enum machine_mode mode,
-+ tree type, bool named);
-+
-+extern rtx avr32_gen_load_multiple (rtx * regs, int count, rtx from,
-+ int write_back, int in_struct_p,
-+ int scalar_p);
-+extern rtx avr32_gen_store_multiple (rtx * regs, int count, rtx to,
-+ int in_struct_p, int scalar_p);
-+extern int avr32_gen_movmemsi (rtx * operands);
-+
-+extern int avr32_rnd_operands (rtx add, rtx shift);
-+extern int avr32_adjust_insn_length (rtx insn, int length);
-+
-+extern int symbol_mentioned_p (rtx x);
-+extern int label_mentioned_p (rtx x);
-+extern rtx legitimize_pic_address (rtx orig, enum machine_mode mode, rtx reg);
-+extern int avr32_address_register_rtx_p (rtx x, int strict_p);
-+extern int avr32_legitimate_index_p (enum machine_mode mode, rtx index,
-+ int strict_p);
-+
-+extern int avr32_const_double_immediate (rtx value);
-+extern void avr32_init_expanders (void);
-+extern rtx avr32_return_addr (int count, rtx frame);
-+extern bool avr32_got_mentioned_p (rtx addr);
-+
-+extern void avr32_final_prescan_insn (rtx insn, rtx * opvec, int noperands);
-+
-+extern int avr32_expand_movcc (enum machine_mode mode, rtx operands[]);
-+extern int avr32_expand_addcc (enum machine_mode mode, rtx operands[]);
-+#ifdef RTX_CODE
-+extern int avr32_expand_scc (RTX_CODE cond, rtx * operands);
-+#endif
-+
-+extern int avr32_store_bypass (rtx insn_out, rtx insn_in);
-+extern int avr32_mul_waw_bypass (rtx insn_out, rtx insn_in);
-+extern int avr32_valid_load_double_bypass (rtx insn_out, rtx insn_in);
-+extern int avr32_valid_load_quad_bypass (rtx insn_out, rtx insn_in);
-+extern rtx avr32_output_cmp (rtx cond, enum machine_mode mode,
-+ rtx op0, rtx op1);
-+
-+rtx get_next_insn_cond (rtx cur_insn);
-+int set_next_insn_cond (rtx cur_insn, rtx cond);
-+rtx next_insn_emits_cmp (rtx cur_insn);
-+void avr32_override_options (void);
-+void avr32_load_pic_register (void);
-+#ifdef GCC_BASIC_BLOCK_H
-+rtx avr32_ifcvt_modify_insn (ce_if_block_t *ce_info, rtx pattern, rtx insn,
-+ int *num_true_changes);
-+rtx avr32_ifcvt_modify_test (ce_if_block_t *ce_info, rtx test );
-+void avr32_ifcvt_modify_cancel ( ce_if_block_t *ce_info, int *num_true_changes);
-+#endif
-+void avr32_optimization_options (int level, int size);
-+int avr32_const_ok_for_move (HOST_WIDE_INT c);
-+
-+void avr32_split_const_expr (enum machine_mode mode,
-+ enum machine_mode new_mode,
-+ rtx expr,
-+ rtx *split_expr);
-+void avr32_get_intval (enum machine_mode mode,
-+ rtx const_expr,
-+ HOST_WIDE_INT *val);
-+
-+int avr32_cond_imm_clobber_splittable (rtx insn,
-+ rtx operands[]);
-+
-+bool avr32_flashvault_call(tree decl);
-+extern void avr32_emit_swdivsf (rtx, rtx, rtx);
-+
-+#endif /* AVR32_PROTOS_H */
diff -Nur gcc-4.4.6.orig/gcc/config/avr32/crti.asm gcc-4.4.6/gcc/config/avr32/crti.asm
--- gcc-4.4.6.orig/gcc/config/avr32/crti.asm 1970-01-01 01:00:00.000000000 +0100
-+++ gcc-4.4.6/gcc/config/avr32/crti.asm 2011-08-27 19:45:42.977989352 +0200
++++ gcc-4.4.6/gcc/config/avr32/crti.asm 2011-10-22 19:23:08.524581303 +0200
@@ -0,0 +1,64 @@
+/*
+ Init/fini stuff for AVR32.
@@ -17102,7 +17102,7 @@ diff -Nur gcc-4.4.6.orig/gcc/config/avr32/crti.asm gcc-4.4.6/gcc/config/avr32/cr
+
diff -Nur gcc-4.4.6.orig/gcc/config/avr32/crtn.asm gcc-4.4.6/gcc/config/avr32/crtn.asm
--- gcc-4.4.6.orig/gcc/config/avr32/crtn.asm 1970-01-01 01:00:00.000000000 +0100
-+++ gcc-4.4.6/gcc/config/avr32/crtn.asm 2011-08-27 19:45:43.020480077 +0200
++++ gcc-4.4.6/gcc/config/avr32/crtn.asm 2011-10-22 19:23:08.524581303 +0200
@@ -0,0 +1,44 @@
+/* Copyright (C) 2001 Free Software Foundation, Inc.
+ Written By Nick Clifton
@@ -17150,7 +17150,7 @@ diff -Nur gcc-4.4.6.orig/gcc/config/avr32/crtn.asm gcc-4.4.6/gcc/config/avr32/cr
+
diff -Nur gcc-4.4.6.orig/gcc/config/avr32/lib1funcs.S gcc-4.4.6/gcc/config/avr32/lib1funcs.S
--- gcc-4.4.6.orig/gcc/config/avr32/lib1funcs.S 1970-01-01 01:00:00.000000000 +0100
-+++ gcc-4.4.6/gcc/config/avr32/lib1funcs.S 2011-08-27 19:46:04.347990802 +0200
++++ gcc-4.4.6/gcc/config/avr32/lib1funcs.S 2011-10-22 19:23:08.524581303 +0200
@@ -0,0 +1,2902 @@
+/* Macro for moving immediate value to register. */
+.macro mov_imm reg, imm
@@ -20056,7 +20056,7 @@ diff -Nur gcc-4.4.6.orig/gcc/config/avr32/lib1funcs.S gcc-4.4.6/gcc/config/avr32
+#endif
diff -Nur gcc-4.4.6.orig/gcc/config/avr32/lib2funcs.S gcc-4.4.6/gcc/config/avr32/lib2funcs.S
--- gcc-4.4.6.orig/gcc/config/avr32/lib2funcs.S 1970-01-01 01:00:00.000000000 +0100
-+++ gcc-4.4.6/gcc/config/avr32/lib2funcs.S 2011-08-27 19:45:43.100490428 +0200
++++ gcc-4.4.6/gcc/config/avr32/lib2funcs.S 2011-10-22 19:23:08.524581303 +0200
@@ -0,0 +1,21 @@
+ .align 4
+ .global __nonlocal_goto
@@ -20081,7 +20081,7 @@ diff -Nur gcc-4.4.6.orig/gcc/config/avr32/lib2funcs.S gcc-4.4.6/gcc/config/avr32
+
diff -Nur gcc-4.4.6.orig/gcc/config/avr32/linux-elf.h gcc-4.4.6/gcc/config/avr32/linux-elf.h
--- gcc-4.4.6.orig/gcc/config/avr32/linux-elf.h 1970-01-01 01:00:00.000000000 +0100
-+++ gcc-4.4.6/gcc/config/avr32/linux-elf.h 2011-08-27 19:45:43.160490580 +0200
++++ gcc-4.4.6/gcc/config/avr32/linux-elf.h 2011-10-22 19:23:08.524581303 +0200
@@ -0,0 +1,151 @@
+/*
+ Linux/Elf specific definitions.
@@ -20236,7 +20236,7 @@ diff -Nur gcc-4.4.6.orig/gcc/config/avr32/linux-elf.h gcc-4.4.6/gcc/config/avr32
+ "%{static:--start-group} %G %L %{static:--end-group}%{!static:%G}"
diff -Nur gcc-4.4.6.orig/gcc/config/avr32/predicates.md gcc-4.4.6/gcc/config/avr32/predicates.md
--- gcc-4.4.6.orig/gcc/config/avr32/predicates.md 1970-01-01 01:00:00.000000000 +0100
-+++ gcc-4.4.6/gcc/config/avr32/predicates.md 2011-08-27 19:45:43.200490072 +0200
++++ gcc-4.4.6/gcc/config/avr32/predicates.md 2011-10-22 19:23:08.524581303 +0200
@@ -0,0 +1,422 @@
+;; AVR32 predicates file.
+;; Copyright 2003-2006 Atmel Corporation.
@@ -20662,7 +20662,7 @@ diff -Nur gcc-4.4.6.orig/gcc/config/avr32/predicates.md gcc-4.4.6/gcc/config/avr
+})
diff -Nur gcc-4.4.6.orig/gcc/config/avr32/simd.md gcc-4.4.6/gcc/config/avr32/simd.md
--- gcc-4.4.6.orig/gcc/config/avr32/simd.md 1970-01-01 01:00:00.000000000 +0100
-+++ gcc-4.4.6/gcc/config/avr32/simd.md 2011-08-27 19:45:43.237989394 +0200
++++ gcc-4.4.6/gcc/config/avr32/simd.md 2011-10-22 19:23:08.528581303 +0200
@@ -0,0 +1,145 @@
+;; AVR32 machine description file for SIMD instructions.
+;; Copyright 2003-2006 Atmel Corporation.
@@ -20811,7 +20811,7 @@ diff -Nur gcc-4.4.6.orig/gcc/config/avr32/simd.md gcc-4.4.6/gcc/config/avr32/sim
+ (set_attr "type" "alu")])
diff -Nur gcc-4.4.6.orig/gcc/config/avr32/sync.md gcc-4.4.6/gcc/config/avr32/sync.md
--- gcc-4.4.6.orig/gcc/config/avr32/sync.md 1970-01-01 01:00:00.000000000 +0100
-+++ gcc-4.4.6/gcc/config/avr32/sync.md 2011-08-27 19:45:43.280490475 +0200
++++ gcc-4.4.6/gcc/config/avr32/sync.md 2011-10-22 19:23:08.528581303 +0200
@@ -0,0 +1,244 @@
+;;=================================================================
+;; Atomic operations
@@ -21059,7 +21059,7 @@ diff -Nur gcc-4.4.6.orig/gcc/config/avr32/sync.md gcc-4.4.6/gcc/config/avr32/syn
+ )
diff -Nur gcc-4.4.6.orig/gcc/config/avr32/t-avr32 gcc-4.4.6/gcc/config/avr32/t-avr32
--- gcc-4.4.6.orig/gcc/config/avr32/t-avr32 1970-01-01 01:00:00.000000000 +0100
-+++ gcc-4.4.6/gcc/config/avr32/t-avr32 2011-08-27 19:45:43.327990411 +0200
++++ gcc-4.4.6/gcc/config/avr32/t-avr32 2011-10-22 19:23:08.528581303 +0200
@@ -0,0 +1,118 @@
+
+MD_INCLUDES= $(srcdir)/config/avr32/avr32.md \
@@ -21181,7 +21181,7 @@ diff -Nur gcc-4.4.6.orig/gcc/config/avr32/t-avr32 gcc-4.4.6/gcc/config/avr32/t-a
+
diff -Nur gcc-4.4.6.orig/gcc/config/avr32/t-avr32-linux gcc-4.4.6/gcc/config/avr32/t-avr32-linux
--- gcc-4.4.6.orig/gcc/config/avr32/t-avr32-linux 1970-01-01 01:00:00.000000000 +0100
-+++ gcc-4.4.6/gcc/config/avr32/t-avr32-linux 2011-08-27 19:45:43.367991180 +0200
++++ gcc-4.4.6/gcc/config/avr32/t-avr32-linux 2011-10-22 19:23:08.528581303 +0200
@@ -0,0 +1,118 @@
+
+MD_INCLUDES= $(srcdir)/config/avr32/avr32.md \
@@ -21303,7 +21303,7 @@ diff -Nur gcc-4.4.6.orig/gcc/config/avr32/t-avr32-linux gcc-4.4.6/gcc/config/avr
+
diff -Nur gcc-4.4.6.orig/gcc/config/avr32/t-elf gcc-4.4.6/gcc/config/avr32/t-elf
--- gcc-4.4.6.orig/gcc/config/avr32/t-elf 1970-01-01 01:00:00.000000000 +0100
-+++ gcc-4.4.6/gcc/config/avr32/t-elf 2011-08-27 19:45:43.427991160 +0200
++++ gcc-4.4.6/gcc/config/avr32/t-elf 2011-10-22 19:23:08.528581303 +0200
@@ -0,0 +1,16 @@
+
+# Assemble startup files.
@@ -21323,7 +21323,7 @@ diff -Nur gcc-4.4.6.orig/gcc/config/avr32/t-elf gcc-4.4.6/gcc/config/avr32/t-elf
+INSTALL_LIBGCC = install-multilib
diff -Nur gcc-4.4.6.orig/gcc/config/avr32/uc3fpu.md gcc-4.4.6/gcc/config/avr32/uc3fpu.md
--- gcc-4.4.6.orig/gcc/config/avr32/uc3fpu.md 1970-01-01 01:00:00.000000000 +0100
-+++ gcc-4.4.6/gcc/config/avr32/uc3fpu.md 2011-08-27 19:45:43.470489984 +0200
++++ gcc-4.4.6/gcc/config/avr32/uc3fpu.md 2011-10-22 19:23:08.528581303 +0200
@@ -0,0 +1,199 @@
+;; AVR32 machine description file for Floating-Point instructions.
+;; Copyright 2003-2006 Atmel Corporation.
@@ -21526,7 +21526,7 @@ diff -Nur gcc-4.4.6.orig/gcc/config/avr32/uc3fpu.md gcc-4.4.6/gcc/config/avr32/u
+ "frsqrta.s %1, %0")
diff -Nur gcc-4.4.6.orig/gcc/config/avr32/uclinux-elf.h gcc-4.4.6/gcc/config/avr32/uclinux-elf.h
--- gcc-4.4.6.orig/gcc/config/avr32/uclinux-elf.h 1970-01-01 01:00:00.000000000 +0100
-+++ gcc-4.4.6/gcc/config/avr32/uclinux-elf.h 2011-08-27 19:45:43.510490479 +0200
++++ gcc-4.4.6/gcc/config/avr32/uclinux-elf.h 2011-10-22 19:23:08.528581303 +0200
@@ -0,0 +1,20 @@
+
+/* Run-time Target Specification. */
@@ -21550,7 +21550,7 @@ diff -Nur gcc-4.4.6.orig/gcc/config/avr32/uclinux-elf.h gcc-4.4.6/gcc/config/avr
+#define TARGET_DEFAULT (AVR32_FLAG_NO_INIT_GOT)
diff -Nur gcc-4.4.6.orig/gcc/config/host-linux.c gcc-4.4.6/gcc/config/host-linux.c
--- gcc-4.4.6.orig/gcc/config/host-linux.c 2009-02-20 16:20:38.000000000 +0100
-+++ gcc-4.4.6/gcc/config/host-linux.c 2011-08-27 19:45:43.560490932 +0200
++++ gcc-4.4.6/gcc/config/host-linux.c 2011-10-22 19:23:08.528581303 +0200
@@ -25,6 +25,9 @@
#include "hosthooks.h"
#include "hosthooks-def.h"
@@ -21563,7 +21563,7 @@ diff -Nur gcc-4.4.6.orig/gcc/config/host-linux.c gcc-4.4.6/gcc/config/host-linux
address of non-fixed mapped segments by a (relatively) small amount.
diff -Nur gcc-4.4.6.orig/gcc/config.gcc gcc-4.4.6/gcc/config.gcc
--- gcc-4.4.6.orig/gcc/config.gcc 2011-02-18 22:39:51.000000000 +0100
-+++ gcc-4.4.6/gcc/config.gcc 2011-08-27 19:45:43.637990448 +0200
++++ gcc-4.4.6/gcc/config.gcc 2011-10-22 19:23:08.528581303 +0200
@@ -810,6 +810,24 @@
avr-*-*)
tm_file="avr/avr.h dbxelf.h"
@@ -21624,7 +21624,7 @@ diff -Nur gcc-4.4.6.orig/gcc/config.gcc gcc-4.4.6/gcc/config.gcc
case "$with_cpu" in
diff -Nur gcc-4.4.6.orig/gcc/config.gcc.orig gcc-4.4.6/gcc/config.gcc.orig
--- gcc-4.4.6.orig/gcc/config.gcc.orig 1970-01-01 01:00:00.000000000 +0100
-+++ gcc-4.4.6/gcc/config.gcc.orig 2011-02-18 22:39:51.000000000 +0100
++++ gcc-4.4.6/gcc/config.gcc.orig 2011-10-22 19:23:08.528581303 +0200
@@ -0,0 +1,3208 @@
+# GCC target-specific configuration file.
+# Copyright 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007,
@@ -24836,7 +24836,7 @@ diff -Nur gcc-4.4.6.orig/gcc/config.gcc.orig gcc-4.4.6/gcc/config.gcc.orig
+fi
diff -Nur gcc-4.4.6.orig/gcc/configure.ac gcc-4.4.6/gcc/configure.ac
--- gcc-4.4.6.orig/gcc/configure.ac 2010-12-13 19:19:43.000000000 +0100
-+++ gcc-4.4.6/gcc/configure.ac 2011-08-27 19:45:43.687987316 +0200
++++ gcc-4.4.6/gcc/configure.ac 2011-10-22 19:23:08.532581301 +0200
@@ -2240,10 +2240,9 @@
as_ver=`$gcc_cv_as --version 2>/dev/null | sed 1q`
if echo "$as_ver" | grep GNU > /dev/null; then
@@ -24862,7 +24862,7 @@ diff -Nur gcc-4.4.6.orig/gcc/configure.ac gcc-4.4.6/gcc/configure.ac
ia64*-*-* | s390*-*-*)
diff -Nur gcc-4.4.6.orig/gcc/doc/extend.texi gcc-4.4.6/gcc/doc/extend.texi
--- gcc-4.4.6.orig/gcc/doc/extend.texi 2011-03-23 22:45:18.000000000 +0100
-+++ gcc-4.4.6/gcc/doc/extend.texi 2011-08-27 19:45:43.717990492 +0200
++++ gcc-4.4.6/gcc/doc/extend.texi 2011-10-22 19:23:08.532581301 +0200
@@ -2397,7 +2397,7 @@
@item interrupt
@@ -25005,7 +25005,7 @@ diff -Nur gcc-4.4.6.orig/gcc/doc/extend.texi gcc-4.4.6/gcc/doc/extend.texi
diff -Nur gcc-4.4.6.orig/gcc/doc/invoke.texi gcc-4.4.6/gcc/doc/invoke.texi
--- gcc-4.4.6.orig/gcc/doc/invoke.texi 2011-03-23 23:02:12.000000000 +0100
-+++ gcc-4.4.6/gcc/doc/invoke.texi 2011-08-27 19:45:43.767989627 +0200
++++ gcc-4.4.6/gcc/doc/invoke.texi 2011-10-22 19:23:08.536581300 +0200
@@ -195,7 +195,7 @@
-fvisibility-ms-compat @gol
-Wabi -Wctor-dtor-privacy @gol
@@ -25266,16667 +25266,9 @@ diff -Nur gcc-4.4.6.orig/gcc/doc/invoke.texi gcc-4.4.6/gcc/doc/invoke.texi
@item -mfast-fp
@opindex mfast-fp
Link with the fast floating-point library. This library relaxes some of
-diff -Nur gcc-4.4.6.orig/gcc/doc/invoke.texi.orig gcc-4.4.6/gcc/doc/invoke.texi.orig
---- gcc-4.4.6.orig/gcc/doc/invoke.texi.orig 1970-01-01 01:00:00.000000000 +0100
-+++ gcc-4.4.6/gcc/doc/invoke.texi.orig 2011-03-23 23:02:12.000000000 +0100
-@@ -0,0 +1,16654 @@
-+@c Copyright (C) 1988, 1989, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999,
-+@c 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009
-+@c Free Software Foundation, Inc.
-+@c This is part of the GCC manual.
-+@c For copying conditions, see the file gcc.texi.
-+
-+@ignore
-+@c man begin INCLUDE
-+@include gcc-vers.texi
-+@c man end
-+
-+@c man begin COPYRIGHT
-+Copyright @copyright{} 1988, 1989, 1992, 1993, 1994, 1995, 1996, 1997, 1998,
-+1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009
-+Free Software Foundation, Inc.
-+
-+Permission is granted to copy, distribute and/or modify this document
-+under the terms of the GNU Free Documentation License, Version 1.2 or
-+any later version published by the Free Software Foundation; with the
-+Invariant Sections being ``GNU General Public License'' and ``Funding
-+Free Software'', the Front-Cover texts being (a) (see below), and with
-+the Back-Cover Texts being (b) (see below). A copy of the license is
-+included in the gfdl(7) man page.
-+
-+(a) The FSF's Front-Cover Text is:
-+
-+ A GNU Manual
-+
-+(b) The FSF's Back-Cover Text is:
-+
-+ You have freedom to copy and modify this GNU Manual, like GNU
-+ software. Copies published by the Free Software Foundation raise
-+ funds for GNU development.
-+@c man end
-+@c Set file name and title for the man page.
-+@setfilename gcc
-+@settitle GNU project C and C++ compiler
-+@c man begin SYNOPSIS
-+gcc [@option{-c}|@option{-S}|@option{-E}] [@option{-std=}@var{standard}]
-+ [@option{-g}] [@option{-pg}] [@option{-O}@var{level}]
-+ [@option{-W}@var{warn}@dots{}] [@option{-pedantic}]
-+ [@option{-I}@var{dir}@dots{}] [@option{-L}@var{dir}@dots{}]
-+ [@option{-D}@var{macro}[=@var{defn}]@dots{}] [@option{-U}@var{macro}]
-+ [@option{-f}@var{option}@dots{}] [@option{-m}@var{machine-option}@dots{}]
-+ [@option{-o} @var{outfile}] [@@@var{file}] @var{infile}@dots{}
-+
-+Only the most useful options are listed here; see below for the
-+remainder. @samp{g++} accepts mostly the same options as @samp{gcc}.
-+@c man end
-+@c man begin SEEALSO
-+gpl(7), gfdl(7), fsf-funding(7),
-+cpp(1), gcov(1), as(1), ld(1), gdb(1), adb(1), dbx(1), sdb(1)
-+and the Info entries for @file{gcc}, @file{cpp}, @file{as},
-+@file{ld}, @file{binutils} and @file{gdb}.
-+@c man end
-+@c man begin BUGS
-+For instructions on reporting bugs, see
-+@w{@value{BUGURL}}.
-+@c man end
-+@c man begin AUTHOR
-+See the Info entry for @command{gcc}, or
-+@w{@uref{http://gcc.gnu.org/onlinedocs/gcc/Contributors.html}},
-+for contributors to GCC@.
-+@c man end
-+@end ignore
-+
-+@node Invoking GCC
-+@chapter GCC Command Options
-+@cindex GCC command options
-+@cindex command options
-+@cindex options, GCC command
-+
-+@c man begin DESCRIPTION
-+When you invoke GCC, it normally does preprocessing, compilation,
-+assembly and linking. The ``overall options'' allow you to stop this
-+process at an intermediate stage. For example, the @option{-c} option
-+says not to run the linker. Then the output consists of object files
-+output by the assembler.
-+
-+Other options are passed on to one stage of processing. Some options
-+control the preprocessor and others the compiler itself. Yet other
-+options control the assembler and linker; most of these are not
-+documented here, since you rarely need to use any of them.
-+
-+@cindex C compilation options
-+Most of the command line options that you can use with GCC are useful
-+for C programs; when an option is only useful with another language
-+(usually C++), the explanation says so explicitly. If the description
-+for a particular option does not mention a source language, you can use
-+that option with all supported languages.
-+
-+@cindex C++ compilation options
-+@xref{Invoking G++,,Compiling C++ Programs}, for a summary of special
-+options for compiling C++ programs.
-+
-+@cindex grouping options
-+@cindex options, grouping
-+The @command{gcc} program accepts options and file names as operands. Many
-+options have multi-letter names; therefore multiple single-letter options
-+may @emph{not} be grouped: @option{-dv} is very different from @w{@samp{-d
-+-v}}.
-+
-+@cindex order of options
-+@cindex options, order
-+You can mix options and other arguments. For the most part, the order
-+you use doesn't matter. Order does matter when you use several
-+options of the same kind; for example, if you specify @option{-L} more
-+than once, the directories are searched in the order specified. Also,
-+the placement of the @option{-l} option is significant.
-+
-+Many options have long names starting with @samp{-f} or with
-+@samp{-W}---for example,
-+@option{-fmove-loop-invariants}, @option{-Wformat} and so on. Most of
-+these have both positive and negative forms; the negative form of
-+@option{-ffoo} would be @option{-fno-foo}. This manual documents
-+only one of these two forms, whichever one is not the default.
-+
-+@c man end
-+
-+@xref{Option Index}, for an index to GCC's options.
-+
-+@menu
-+* Option Summary:: Brief list of all options, without explanations.
-+* Overall Options:: Controlling the kind of output:
-+ an executable, object files, assembler files,
-+ or preprocessed source.
-+* Invoking G++:: Compiling C++ programs.
-+* C Dialect Options:: Controlling the variant of C language compiled.
-+* C++ Dialect Options:: Variations on C++.
-+* Objective-C and Objective-C++ Dialect Options:: Variations on Objective-C
-+ and Objective-C++.
-+* Language Independent Options:: Controlling how diagnostics should be
-+ formatted.
-+* Warning Options:: How picky should the compiler be?
-+* Debugging Options:: Symbol tables, measurements, and debugging dumps.
-+* Optimize Options:: How much optimization?
-+* Preprocessor Options:: Controlling header files and macro definitions.
-+ Also, getting dependency information for Make.
-+* Assembler Options:: Passing options to the assembler.
-+* Link Options:: Specifying libraries and so on.
-+* Directory Options:: Where to find header files and libraries.
-+ Where to find the compiler executable files.
-+* Spec Files:: How to pass switches to sub-processes.
-+* Target Options:: Running a cross-compiler, or an old version of GCC.
-+* Submodel Options:: Specifying minor hardware or convention variations,
-+ such as 68010 vs 68020.
-+* Code Gen Options:: Specifying conventions for function calls, data layout
-+ and register usage.
-+* Environment Variables:: Env vars that affect GCC.
-+* Precompiled Headers:: Compiling a header once, and using it many times.
-+* Running Protoize:: Automatically adding or removing function prototypes.
-+@end menu
-+
-+@c man begin OPTIONS
-+
-+@node Option Summary
-+@section Option Summary
-+
-+Here is a summary of all the options, grouped by type. Explanations are
-+in the following sections.
-+
-+@table @emph
-+@item Overall Options
-+@xref{Overall Options,,Options Controlling the Kind of Output}.
-+@gccoptlist{-c -S -E -o @var{file} -combine -pipe -pass-exit-codes @gol
-+-x @var{language} -v -### --help@r{[}=@var{class}@r{[},@dots{}@r{]]} --target-help @gol
-+--version -wrapper@@@var{file}}
-+
-+@item C Language Options
-+@xref{C Dialect Options,,Options Controlling C Dialect}.
-+@gccoptlist{-ansi -std=@var{standard} -fgnu89-inline @gol
-+-aux-info @var{filename} @gol
-+-fno-asm -fno-builtin -fno-builtin-@var{function} @gol
-+-fhosted -ffreestanding -fopenmp -fms-extensions @gol
-+-trigraphs -no-integrated-cpp -traditional -traditional-cpp @gol
-+-fallow-single-precision -fcond-mismatch -flax-vector-conversions @gol
-+-fsigned-bitfields -fsigned-char @gol
-+-funsigned-bitfields -funsigned-char}
-+
-+@item C++ Language Options
-+@xref{C++ Dialect Options,,Options Controlling C++ Dialect}.
-+@gccoptlist{-fabi-version=@var{n} -fno-access-control -fcheck-new @gol
-+-fconserve-space -ffriend-injection @gol
-+-fno-elide-constructors @gol
-+-fno-enforce-eh-specs @gol
-+-ffor-scope -fno-for-scope -fno-gnu-keywords @gol
-+-fno-implicit-templates @gol
-+-fno-implicit-inline-templates @gol
-+-fno-implement-inlines -fms-extensions @gol
-+-fno-nonansi-builtins -fno-operator-names @gol
-+-fno-optional-diags -fpermissive @gol
-+-frepo -fno-rtti -fstats -ftemplate-depth-@var{n} @gol
-+-fno-threadsafe-statics -fuse-cxa-atexit -fno-weak -nostdinc++ @gol
-+-fno-default-inline -fvisibility-inlines-hidden @gol
-+-fvisibility-ms-compat @gol
-+-Wabi -Wctor-dtor-privacy @gol
-+-Wnon-virtual-dtor -Wreorder @gol
-+-Weffc++ -Wstrict-null-sentinel @gol
-+-Wno-non-template-friend -Wold-style-cast @gol
-+-Woverloaded-virtual -Wno-pmf-conversions @gol
-+-Wsign-promo}
-+
-+@item Objective-C and Objective-C++ Language Options
-+@xref{Objective-C and Objective-C++ Dialect Options,,Options Controlling
-+Objective-C and Objective-C++ Dialects}.
-+@gccoptlist{-fconstant-string-class=@var{class-name} @gol
-+-fgnu-runtime -fnext-runtime @gol
-+-fno-nil-receivers @gol
-+-fobjc-call-cxx-cdtors @gol
-+-fobjc-direct-dispatch @gol
-+-fobjc-exceptions @gol
-+-fobjc-gc @gol
-+-freplace-objc-classes @gol
-+-fzero-link @gol
-+-gen-decls @gol
-+-Wassign-intercept @gol
-+-Wno-protocol -Wselector @gol
-+-Wstrict-selector-match @gol
-+-Wundeclared-selector}
-+
-+@item Language Independent Options
-+@xref{Language Independent Options,,Options to Control Diagnostic Messages Formatting}.
-+@gccoptlist{-fmessage-length=@var{n} @gol
-+-fdiagnostics-show-location=@r{[}once@r{|}every-line@r{]} @gol
-+-fdiagnostics-show-option}
-+
-+@item Warning Options
-+@xref{Warning Options,,Options to Request or Suppress Warnings}.
-+@gccoptlist{-fsyntax-only -pedantic -pedantic-errors @gol
-+-w -Wextra -Wall -Waddress -Waggregate-return -Warray-bounds @gol
-+-Wno-attributes -Wno-builtin-macro-redefined @gol
-+-Wc++-compat -Wc++0x-compat -Wcast-align -Wcast-qual @gol
-+-Wchar-subscripts -Wclobbered -Wcomment @gol
-+-Wconversion -Wcoverage-mismatch -Wno-deprecated @gol
-+-Wno-deprecated-declarations -Wdisabled-optimization @gol
-+-Wno-div-by-zero -Wempty-body -Wenum-compare -Wno-endif-labels @gol
-+-Werror -Werror=* @gol
-+-Wfatal-errors -Wfloat-equal -Wformat -Wformat=2 @gol
-+-Wno-format-contains-nul -Wno-format-extra-args -Wformat-nonliteral @gol
-+-Wformat-security -Wformat-y2k @gol
-+-Wframe-larger-than=@var{len} -Wignored-qualifiers @gol
-+-Wimplicit -Wimplicit-function-declaration -Wimplicit-int @gol
-+-Winit-self -Winline @gol
-+-Wno-int-to-pointer-cast -Wno-invalid-offsetof @gol
-+-Winvalid-pch -Wlarger-than=@var{len} -Wunsafe-loop-optimizations @gol
-+-Wlogical-op -Wlong-long @gol
-+-Wmain -Wmissing-braces -Wmissing-field-initializers @gol
-+-Wmissing-format-attribute -Wmissing-include-dirs @gol
-+-Wmissing-noreturn -Wno-mudflap @gol
-+-Wno-multichar -Wnonnull -Wno-overflow @gol
-+-Woverlength-strings -Wpacked -Wpacked-bitfield-compat -Wpadded @gol
-+-Wparentheses -Wpedantic-ms-format -Wno-pedantic-ms-format @gol
-+-Wpointer-arith -Wno-pointer-to-int-cast @gol
-+-Wredundant-decls @gol
-+-Wreturn-type -Wsequence-point -Wshadow @gol
-+-Wsign-compare -Wsign-conversion -Wstack-protector @gol
-+-Wstrict-aliasing -Wstrict-aliasing=n @gol
-+-Wstrict-overflow -Wstrict-overflow=@var{n} @gol
-+-Wswitch -Wswitch-default -Wswitch-enum -Wsync-nand @gol
-+-Wsystem-headers -Wtrigraphs -Wtype-limits -Wundef -Wuninitialized @gol
-+-Wunknown-pragmas -Wno-pragmas -Wunreachable-code @gol
-+-Wunused -Wunused-function -Wunused-label -Wunused-parameter @gol
-+-Wunused-value -Wunused-variable @gol
-+-Wvariadic-macros -Wvla @gol
-+-Wvolatile-register-var -Wwrite-strings}
-+
-+@item C and Objective-C-only Warning Options
-+@gccoptlist{-Wbad-function-cast -Wmissing-declarations @gol
-+-Wmissing-parameter-type -Wmissing-prototypes -Wnested-externs @gol
-+-Wold-style-declaration -Wold-style-definition @gol
-+-Wstrict-prototypes -Wtraditional -Wtraditional-conversion @gol
-+-Wdeclaration-after-statement -Wpointer-sign}
-+
-+@item Debugging Options
-+@xref{Debugging Options,,Options for Debugging Your Program or GCC}.
-+@gccoptlist{-d@var{letters} -dumpspecs -dumpmachine -dumpversion @gol
-+-fdbg-cnt-list -fdbg-cnt=@var{counter-value-list} @gol
-+-fdump-noaddr -fdump-unnumbered @gol
-+-fdump-translation-unit@r{[}-@var{n}@r{]} @gol
-+-fdump-class-hierarchy@r{[}-@var{n}@r{]} @gol
-+-fdump-ipa-all -fdump-ipa-cgraph -fdump-ipa-inline @gol
-+-fdump-statistics @gol
-+-fdump-tree-all @gol
-+-fdump-tree-original@r{[}-@var{n}@r{]} @gol
-+-fdump-tree-optimized@r{[}-@var{n}@r{]} @gol
-+-fdump-tree-cfg -fdump-tree-vcg -fdump-tree-alias @gol
-+-fdump-tree-ch @gol
-+-fdump-tree-ssa@r{[}-@var{n}@r{]} -fdump-tree-pre@r{[}-@var{n}@r{]} @gol
-+-fdump-tree-ccp@r{[}-@var{n}@r{]} -fdump-tree-dce@r{[}-@var{n}@r{]} @gol
-+-fdump-tree-gimple@r{[}-raw@r{]} -fdump-tree-mudflap@r{[}-@var{n}@r{]} @gol
-+-fdump-tree-dom@r{[}-@var{n}@r{]} @gol
-+-fdump-tree-dse@r{[}-@var{n}@r{]} @gol
-+-fdump-tree-phiopt@r{[}-@var{n}@r{]} @gol
-+-fdump-tree-forwprop@r{[}-@var{n}@r{]} @gol
-+-fdump-tree-copyrename@r{[}-@var{n}@r{]} @gol
-+-fdump-tree-nrv -fdump-tree-vect @gol
-+-fdump-tree-sink @gol
-+-fdump-tree-sra@r{[}-@var{n}@r{]} @gol
-+-fdump-tree-fre@r{[}-@var{n}@r{]} @gol
-+-fdump-tree-vrp@r{[}-@var{n}@r{]} @gol
-+-ftree-vectorizer-verbose=@var{n} @gol
-+-fdump-tree-storeccp@r{[}-@var{n}@r{]} @gol
-+-feliminate-dwarf2-dups -feliminate-unused-debug-types @gol
-+-feliminate-unused-debug-symbols -femit-class-debug-always @gol
-+-fmem-report -fpre-ipa-mem-report -fpost-ipa-mem-report -fprofile-arcs @gol
-+-frandom-seed=@var{string} -fsched-verbose=@var{n} @gol
-+-fsel-sched-verbose -fsel-sched-dump-cfg -fsel-sched-pipelining-verbose @gol
-+-ftest-coverage -ftime-report -fvar-tracking @gol
-+-g -g@var{level} -gcoff -gdwarf-2 @gol
-+-ggdb -gstabs -gstabs+ -gvms -gxcoff -gxcoff+ @gol
-+-fno-merge-debug-strings -fno-dwarf2-cfi-asm @gol
-+-fdebug-prefix-map=@var{old}=@var{new} @gol
-+-femit-struct-debug-baseonly -femit-struct-debug-reduced @gol
-+-femit-struct-debug-detailed@r{[}=@var{spec-list}@r{]} @gol
-+-p -pg -print-file-name=@var{library} -print-libgcc-file-name @gol
-+-print-multi-directory -print-multi-lib @gol
-+-print-prog-name=@var{program} -print-search-dirs -Q @gol
-+-print-sysroot -print-sysroot-headers-suffix @gol
-+-save-temps -time}
-+
-+@item Optimization Options
-+@xref{Optimize Options,,Options that Control Optimization}.
-+@gccoptlist{
-+-falign-functions[=@var{n}] -falign-jumps[=@var{n}] @gol
-+-falign-labels[=@var{n}] -falign-loops[=@var{n}] -fassociative-math @gol
-+-fauto-inc-dec -fbranch-probabilities -fbranch-target-load-optimize @gol
-+-fbranch-target-load-optimize2 -fbtr-bb-exclusive -fcaller-saves @gol
-+-fcheck-data-deps -fconserve-stack -fcprop-registers -fcrossjumping @gol
-+-fcse-follow-jumps -fcse-skip-blocks -fcx-fortran-rules -fcx-limited-range @gol
-+-fdata-sections -fdce -fdce @gol
-+-fdelayed-branch -fdelete-null-pointer-checks -fdse -fdse @gol
-+-fearly-inlining -fexpensive-optimizations -ffast-math @gol
-+-ffinite-math-only -ffloat-store -fforward-propagate @gol
-+-ffunction-sections -fgcse -fgcse-after-reload -fgcse-las -fgcse-lm @gol
-+-fgcse-sm -fif-conversion -fif-conversion2 -findirect-inlining @gol
-+-finline-functions -finline-functions-called-once -finline-limit=@var{n} @gol
-+-finline-small-functions -fipa-cp -fipa-cp-clone -fipa-matrix-reorg -fipa-pta @gol
-+-fipa-pure-const -fipa-reference -fipa-struct-reorg @gol
-+-fipa-type-escape -fira-algorithm=@var{algorithm} @gol
-+-fira-region=@var{region} -fira-coalesce -fno-ira-share-save-slots @gol
-+-fno-ira-share-spill-slots -fira-verbose=@var{n} @gol
-+-fivopts -fkeep-inline-functions -fkeep-static-consts @gol
-+-floop-block -floop-interchange -floop-strip-mine @gol
-+-fmerge-all-constants -fmerge-constants -fmodulo-sched @gol
-+-fmodulo-sched-allow-regmoves -fmove-loop-invariants -fmudflap @gol
-+-fmudflapir -fmudflapth -fno-branch-count-reg -fno-default-inline @gol
-+-fno-defer-pop -fno-function-cse -fno-guess-branch-probability @gol
-+-fno-inline -fno-math-errno -fno-peephole -fno-peephole2 @gol
-+-fno-sched-interblock -fno-sched-spec -fno-signed-zeros @gol
-+-fno-toplevel-reorder -fno-trapping-math -fno-zero-initialized-in-bss @gol
-+-fomit-frame-pointer -foptimize-register-move -foptimize-sibling-calls @gol
-+-fpeel-loops -fpredictive-commoning -fprefetch-loop-arrays @gol
-+-fprofile-correction -fprofile-dir=@var{path} -fprofile-generate @gol
-+-fprofile-generate=@var{path} @gol
-+-fprofile-use -fprofile-use=@var{path} -fprofile-values @gol
-+-freciprocal-math -fregmove -frename-registers -freorder-blocks @gol
-+-freorder-blocks-and-partition -freorder-functions @gol
-+-frerun-cse-after-loop -freschedule-modulo-scheduled-loops @gol
-+-frounding-math -frtl-abstract-sequences -fsched2-use-superblocks @gol
-+-fsched2-use-traces -fsched-spec-load -fsched-spec-load-dangerous @gol
-+-fsched-stalled-insns-dep[=@var{n}] -fsched-stalled-insns[=@var{n}] @gol
-+-fschedule-insns -fschedule-insns2 -fsection-anchors -fsee @gol
-+-fselective-scheduling -fselective-scheduling2 @gol
-+-fsel-sched-pipelining -fsel-sched-pipelining-outer-loops @gol
-+-fsignaling-nans -fsingle-precision-constant -fsplit-ivs-in-unroller @gol
-+-fsplit-wide-types -fstack-protector -fstack-protector-all @gol
-+-fstrict-aliasing -fstrict-overflow -fthread-jumps -ftracer @gol
-+-ftree-builtin-call-dce -ftree-ccp -ftree-ch -ftree-copy-prop @gol
-+-ftree-copyrename -ftree-dce @gol
-+-ftree-dominator-opts -ftree-dse -ftree-fre -ftree-loop-im @gol
-+-ftree-loop-distribution @gol
-+-ftree-loop-ivcanon -ftree-loop-linear -ftree-loop-optimize @gol
-+-ftree-parallelize-loops=@var{n} -ftree-pre -ftree-reassoc @gol
-+-ftree-sink -ftree-sra -ftree-switch-conversion @gol
-+-ftree-ter -ftree-vect-loop-version -ftree-vectorize -ftree-vrp @gol
-+-funit-at-a-time -funroll-all-loops -funroll-loops @gol
-+-funsafe-loop-optimizations -funsafe-math-optimizations -funswitch-loops @gol
-+-fvariable-expansion-in-unroller -fvect-cost-model -fvpt -fweb @gol
-+-fwhole-program @gol
-+--param @var{name}=@var{value}
-+-O -O0 -O1 -O2 -O3 -Os}
-+
-+@item Preprocessor Options
-+@xref{Preprocessor Options,,Options Controlling the Preprocessor}.
-+@gccoptlist{-A@var{question}=@var{answer} @gol
-+-A-@var{question}@r{[}=@var{answer}@r{]} @gol
-+-C -dD -dI -dM -dN @gol
-+-D@var{macro}@r{[}=@var{defn}@r{]} -E -H @gol
-+-idirafter @var{dir} @gol
-+-include @var{file} -imacros @var{file} @gol
-+-iprefix @var{file} -iwithprefix @var{dir} @gol
-+-iwithprefixbefore @var{dir} -isystem @var{dir} @gol
-+-imultilib @var{dir} -isysroot @var{dir} @gol
-+-M -MM -MF -MG -MP -MQ -MT -nostdinc @gol
-+-P -fworking-directory -remap @gol
-+-trigraphs -undef -U@var{macro} -Wp,@var{option} @gol
-+-Xpreprocessor @var{option}}
-+
-+@item Assembler Option
-+@xref{Assembler Options,,Passing Options to the Assembler}.
-+@gccoptlist{-Wa,@var{option} -Xassembler @var{option}}
-+
-+@item Linker Options
-+@xref{Link Options,,Options for Linking}.
-+@gccoptlist{@var{object-file-name} -l@var{library} @gol
-+-nostartfiles -nodefaultlibs -nostdlib -pie -rdynamic @gol
-+-s -static -static-libgcc -shared -shared-libgcc -symbolic @gol
-+-T @var{script} -Wl,@var{option} -Xlinker @var{option} @gol
-+-u @var{symbol}}
-+
-+@item Directory Options
-+@xref{Directory Options,,Options for Directory Search}.
-+@gccoptlist{-B@var{prefix} -I@var{dir} -iquote@var{dir} -L@var{dir}
-+-specs=@var{file} -I- --sysroot=@var{dir}}
-+
-+@item Target Options
-+@c I wrote this xref this way to avoid overfull hbox. -- rms
-+@xref{Target Options}.
-+@gccoptlist{-V @var{version} -b @var{machine}}
-+
-+@item Machine Dependent Options
-+@xref{Submodel Options,,Hardware Models and Configurations}.
-+@c This list is ordered alphanumerically by subsection name.
-+@c Try and put the significant identifier (CPU or system) first,
-+@c so users have a clue at guessing where the ones they want will be.
-+
-+@emph{ARC Options}
-+@gccoptlist{-EB -EL @gol
-+-mmangle-cpu -mcpu=@var{cpu} -mtext=@var{text-section} @gol
-+-mdata=@var{data-section} -mrodata=@var{readonly-data-section}}
-+
-+@emph{ARM Options}
-+@gccoptlist{-mapcs-frame -mno-apcs-frame @gol
-+-mabi=@var{name} @gol
-+-mapcs-stack-check -mno-apcs-stack-check @gol
-+-mapcs-float -mno-apcs-float @gol
-+-mapcs-reentrant -mno-apcs-reentrant @gol
-+-msched-prolog -mno-sched-prolog @gol
-+-mlittle-endian -mbig-endian -mwords-little-endian @gol
-+-mfloat-abi=@var{name} -msoft-float -mhard-float -mfpe @gol
-+-mthumb-interwork -mno-thumb-interwork @gol
-+-mcpu=@var{name} -march=@var{name} -mfpu=@var{name} @gol
-+-mstructure-size-boundary=@var{n} @gol
-+-mabort-on-noreturn @gol
-+-mlong-calls -mno-long-calls @gol
-+-msingle-pic-base -mno-single-pic-base @gol
-+-mpic-register=@var{reg} @gol
-+-mnop-fun-dllimport @gol
-+-mcirrus-fix-invalid-insns -mno-cirrus-fix-invalid-insns @gol
-+-mpoke-function-name @gol
-+-mthumb -marm @gol
-+-mtpcs-frame -mtpcs-leaf-frame @gol
-+-mcaller-super-interworking -mcallee-super-interworking @gol
-+-mtp=@var{name} @gol
-+-mword-relocations @gol
-+-mfix-cortex-m3-ldrd}
-+
-+@emph{AVR Options}
-+@gccoptlist{-mmcu=@var{mcu} -msize -mno-interrupts @gol
-+-mcall-prologues -mno-tablejump -mtiny-stack -mint8}
-+
-+@emph{Blackfin Options}
-+@gccoptlist{-mcpu=@var{cpu}@r{[}-@var{sirevision}@r{]} @gol
-+-msim -momit-leaf-frame-pointer -mno-omit-leaf-frame-pointer @gol
-+-mspecld-anomaly -mno-specld-anomaly -mcsync-anomaly -mno-csync-anomaly @gol
-+-mlow-64k -mno-low64k -mstack-check-l1 -mid-shared-library @gol
-+-mno-id-shared-library -mshared-library-id=@var{n} @gol
-+-mleaf-id-shared-library -mno-leaf-id-shared-library @gol
-+-msep-data -mno-sep-data -mlong-calls -mno-long-calls @gol
-+-mfast-fp -minline-plt -mmulticore -mcorea -mcoreb -msdram @gol
-+-micplb}
-+
-+@emph{CRIS Options}
-+@gccoptlist{-mcpu=@var{cpu} -march=@var{cpu} -mtune=@var{cpu} @gol
-+-mmax-stack-frame=@var{n} -melinux-stacksize=@var{n} @gol
-+-metrax4 -metrax100 -mpdebug -mcc-init -mno-side-effects @gol
-+-mstack-align -mdata-align -mconst-align @gol
-+-m32-bit -m16-bit -m8-bit -mno-prologue-epilogue -mno-gotplt @gol
-+-melf -maout -melinux -mlinux -sim -sim2 @gol
-+-mmul-bug-workaround -mno-mul-bug-workaround}
-+
-+@emph{CRX Options}
-+@gccoptlist{-mmac -mpush-args}
-+
-+@emph{Darwin Options}
-+@gccoptlist{-all_load -allowable_client -arch -arch_errors_fatal @gol
-+-arch_only -bind_at_load -bundle -bundle_loader @gol
-+-client_name -compatibility_version -current_version @gol
-+-dead_strip @gol
-+-dependency-file -dylib_file -dylinker_install_name @gol
-+-dynamic -dynamiclib -exported_symbols_list @gol
-+-filelist -flat_namespace -force_cpusubtype_ALL @gol
-+-force_flat_namespace -headerpad_max_install_names @gol
-+-iframework @gol
-+-image_base -init -install_name -keep_private_externs @gol
-+-multi_module -multiply_defined -multiply_defined_unused @gol
-+-noall_load -no_dead_strip_inits_and_terms @gol
-+-nofixprebinding -nomultidefs -noprebind -noseglinkedit @gol
-+-pagezero_size -prebind -prebind_all_twolevel_modules @gol
-+-private_bundle -read_only_relocs -sectalign @gol
-+-sectobjectsymbols -whyload -seg1addr @gol
-+-sectcreate -sectobjectsymbols -sectorder @gol
-+-segaddr -segs_read_only_addr -segs_read_write_addr @gol
-+-seg_addr_table -seg_addr_table_filename -seglinkedit @gol
-+-segprot -segs_read_only_addr -segs_read_write_addr @gol
-+-single_module -static -sub_library -sub_umbrella @gol
-+-twolevel_namespace -umbrella -undefined @gol
-+-unexported_symbols_list -weak_reference_mismatches @gol
-+-whatsloaded -F -gused -gfull -mmacosx-version-min=@var{version} @gol
-+-mkernel -mone-byte-bool}
-+
-+@emph{DEC Alpha Options}
-+@gccoptlist{-mno-fp-regs -msoft-float -malpha-as -mgas @gol
-+-mieee -mieee-with-inexact -mieee-conformant @gol
-+-mfp-trap-mode=@var{mode} -mfp-rounding-mode=@var{mode} @gol
-+-mtrap-precision=@var{mode} -mbuild-constants @gol
-+-mcpu=@var{cpu-type} -mtune=@var{cpu-type} @gol
-+-mbwx -mmax -mfix -mcix @gol
-+-mfloat-vax -mfloat-ieee @gol
-+-mexplicit-relocs -msmall-data -mlarge-data @gol
-+-msmall-text -mlarge-text @gol
-+-mmemory-latency=@var{time}}
-+
-+@emph{DEC Alpha/VMS Options}
-+@gccoptlist{-mvms-return-codes}
-+
-+@emph{FR30 Options}
-+@gccoptlist{-msmall-model -mno-lsim}
-+
-+@emph{FRV Options}
-+@gccoptlist{-mgpr-32 -mgpr-64 -mfpr-32 -mfpr-64 @gol
-+-mhard-float -msoft-float @gol
-+-malloc-cc -mfixed-cc -mdword -mno-dword @gol
-+-mdouble -mno-double @gol
-+-mmedia -mno-media -mmuladd -mno-muladd @gol
-+-mfdpic -minline-plt -mgprel-ro -multilib-library-pic @gol
-+-mlinked-fp -mlong-calls -malign-labels @gol
-+-mlibrary-pic -macc-4 -macc-8 @gol
-+-mpack -mno-pack -mno-eflags -mcond-move -mno-cond-move @gol
-+-moptimize-membar -mno-optimize-membar @gol
-+-mscc -mno-scc -mcond-exec -mno-cond-exec @gol
-+-mvliw-branch -mno-vliw-branch @gol
-+-mmulti-cond-exec -mno-multi-cond-exec -mnested-cond-exec @gol
-+-mno-nested-cond-exec -mtomcat-stats @gol
-+-mTLS -mtls @gol
-+-mcpu=@var{cpu}}
-+
-+@emph{GNU/Linux Options}
-+@gccoptlist{-muclibc}
-+
-+@emph{H8/300 Options}
-+@gccoptlist{-mrelax -mh -ms -mn -mint32 -malign-300}
-+
-+@emph{HPPA Options}
-+@gccoptlist{-march=@var{architecture-type} @gol
-+-mbig-switch -mdisable-fpregs -mdisable-indexing @gol
-+-mfast-indirect-calls -mgas -mgnu-ld -mhp-ld @gol
-+-mfixed-range=@var{register-range} @gol
-+-mjump-in-delay -mlinker-opt -mlong-calls @gol
-+-mlong-load-store -mno-big-switch -mno-disable-fpregs @gol
-+-mno-disable-indexing -mno-fast-indirect-calls -mno-gas @gol
-+-mno-jump-in-delay -mno-long-load-store @gol
-+-mno-portable-runtime -mno-soft-float @gol
-+-mno-space-regs -msoft-float -mpa-risc-1-0 @gol
-+-mpa-risc-1-1 -mpa-risc-2-0 -mportable-runtime @gol
-+-mschedule=@var{cpu-type} -mspace-regs -msio -mwsio @gol
-+-munix=@var{unix-std} -nolibdld -static -threads}
-+
-+@emph{i386 and x86-64 Options}
-+@gccoptlist{-mtune=@var{cpu-type} -march=@var{cpu-type} @gol
-+-mfpmath=@var{unit} @gol
-+-masm=@var{dialect} -mno-fancy-math-387 @gol
-+-mno-fp-ret-in-387 -msoft-float @gol
-+-mno-wide-multiply -mrtd -malign-double @gol
-+-mpreferred-stack-boundary=@var{num}
-+-mincoming-stack-boundary=@var{num}
-+-mcld -mcx16 -msahf -mrecip @gol
-+-mmmx -msse -msse2 -msse3 -mssse3 -msse4.1 -msse4.2 -msse4 -mavx @gol
-+-maes -mpclmul @gol
-+-msse4a -m3dnow -mpopcnt -mabm -msse5 @gol
-+-mthreads -mno-align-stringops -minline-all-stringops @gol
-+-minline-stringops-dynamically -mstringop-strategy=@var{alg} @gol
-+-mpush-args -maccumulate-outgoing-args -m128bit-long-double @gol
-+-m96bit-long-double -mregparm=@var{num} -msseregparm @gol
-+-mveclibabi=@var{type} -mpc32 -mpc64 -mpc80 -mstackrealign @gol
-+-momit-leaf-frame-pointer -mno-red-zone -mno-tls-direct-seg-refs @gol
-+-mcmodel=@var{code-model} @gol
-+-m32 -m64 -mlarge-data-threshold=@var{num} @gol
-+-mfused-madd -mno-fused-madd -msse2avx}
-+
-+@emph{i386 and x86-64 Windows Options}
-+@gccoptlist{-mconsole -mcygwin -mno-cygwin -mdll
-+-mnop-fun-dllimport -mthread -mwin32 -mwindows}
-+
-+@emph{IA-64 Options}
-+@gccoptlist{-mbig-endian -mlittle-endian -mgnu-as -mgnu-ld -mno-pic @gol
-+-mvolatile-asm-stop -mregister-names -mno-sdata @gol
-+-mconstant-gp -mauto-pic -minline-float-divide-min-latency @gol
-+-minline-float-divide-max-throughput @gol
-+-minline-int-divide-min-latency @gol
-+-minline-int-divide-max-throughput @gol
-+-minline-sqrt-min-latency -minline-sqrt-max-throughput @gol
-+-mno-dwarf2-asm -mearly-stop-bits @gol
-+-mfixed-range=@var{register-range} -mtls-size=@var{tls-size} @gol
-+-mtune=@var{cpu-type} -mt -pthread -milp32 -mlp64 @gol
-+-mno-sched-br-data-spec -msched-ar-data-spec -mno-sched-control-spec @gol
-+-msched-br-in-data-spec -msched-ar-in-data-spec -msched-in-control-spec @gol
-+-msched-ldc -mno-sched-control-ldc -mno-sched-spec-verbose @gol
-+-mno-sched-prefer-non-data-spec-insns @gol
-+-mno-sched-prefer-non-control-spec-insns @gol
-+-mno-sched-count-spec-in-critical-path}
-+
-+@emph{M32R/D Options}
-+@gccoptlist{-m32r2 -m32rx -m32r @gol
-+-mdebug @gol
-+-malign-loops -mno-align-loops @gol
-+-missue-rate=@var{number} @gol
-+-mbranch-cost=@var{number} @gol
-+-mmodel=@var{code-size-model-type} @gol
-+-msdata=@var{sdata-type} @gol
-+-mno-flush-func -mflush-func=@var{name} @gol
-+-mno-flush-trap -mflush-trap=@var{number} @gol
-+-G @var{num}}
-+
-+@emph{M32C Options}
-+@gccoptlist{-mcpu=@var{cpu} -msim -memregs=@var{number}}
-+
-+@emph{M680x0 Options}
-+@gccoptlist{-march=@var{arch} -mcpu=@var{cpu} -mtune=@var{tune}
-+-m68000 -m68020 -m68020-40 -m68020-60 -m68030 -m68040 @gol
-+-m68060 -mcpu32 -m5200 -m5206e -m528x -m5307 -m5407 @gol
-+-mcfv4e -mbitfield -mno-bitfield -mc68000 -mc68020 @gol
-+-mnobitfield -mrtd -mno-rtd -mdiv -mno-div -mshort @gol
-+-mno-short -mhard-float -m68881 -msoft-float -mpcrel @gol
-+-malign-int -mstrict-align -msep-data -mno-sep-data @gol
-+-mshared-library-id=n -mid-shared-library -mno-id-shared-library @gol
-+-mxgot -mno-xgot}
-+
-+@emph{M68hc1x Options}
-+@gccoptlist{-m6811 -m6812 -m68hc11 -m68hc12 -m68hcs12 @gol
-+-mauto-incdec -minmax -mlong-calls -mshort @gol
-+-msoft-reg-count=@var{count}}
-+
-+@emph{MCore Options}
-+@gccoptlist{-mhardlit -mno-hardlit -mdiv -mno-div -mrelax-immediates @gol
-+-mno-relax-immediates -mwide-bitfields -mno-wide-bitfields @gol
-+-m4byte-functions -mno-4byte-functions -mcallgraph-data @gol
-+-mno-callgraph-data -mslow-bytes -mno-slow-bytes -mno-lsim @gol
-+-mlittle-endian -mbig-endian -m210 -m340 -mstack-increment}
-+
-+@emph{MIPS Options}
-+@gccoptlist{-EL -EB -march=@var{arch} -mtune=@var{arch} @gol
-+-mips1 -mips2 -mips3 -mips4 -mips32 -mips32r2 @gol
-+-mips64 -mips64r2 @gol
-+-mips16 -mno-mips16 -mflip-mips16 @gol
-+-minterlink-mips16 -mno-interlink-mips16 @gol
-+-mabi=@var{abi} -mabicalls -mno-abicalls @gol
-+-mshared -mno-shared -mplt -mno-plt -mxgot -mno-xgot @gol
-+-mgp32 -mgp64 -mfp32 -mfp64 -mhard-float -msoft-float @gol
-+-msingle-float -mdouble-float -mdsp -mno-dsp -mdspr2 -mno-dspr2 @gol
-+-mfpu=@var{fpu-type} @gol
-+-msmartmips -mno-smartmips @gol
-+-mpaired-single -mno-paired-single -mdmx -mno-mdmx @gol
-+-mips3d -mno-mips3d -mmt -mno-mt -mllsc -mno-llsc @gol
-+-mlong64 -mlong32 -msym32 -mno-sym32 @gol
-+-G@var{num} -mlocal-sdata -mno-local-sdata @gol
-+-mextern-sdata -mno-extern-sdata -mgpopt -mno-gopt @gol
-+-membedded-data -mno-embedded-data @gol
-+-muninit-const-in-rodata -mno-uninit-const-in-rodata @gol
-+-mcode-readable=@var{setting} @gol
-+-msplit-addresses -mno-split-addresses @gol
-+-mexplicit-relocs -mno-explicit-relocs @gol
-+-mcheck-zero-division -mno-check-zero-division @gol
-+-mdivide-traps -mdivide-breaks @gol
-+-mmemcpy -mno-memcpy -mlong-calls -mno-long-calls @gol
-+-mmad -mno-mad -mfused-madd -mno-fused-madd -nocpp @gol
-+-mfix-r4000 -mno-fix-r4000 -mfix-r4400 -mno-fix-r4400 @gol
-+-mfix-r10000 -mno-fix-r10000 -mfix-vr4120 -mno-fix-vr4120 @gol
-+-mfix-vr4130 -mno-fix-vr4130 -mfix-sb1 -mno-fix-sb1 @gol
-+-mflush-func=@var{func} -mno-flush-func @gol
-+-mbranch-cost=@var{num} -mbranch-likely -mno-branch-likely @gol
-+-mfp-exceptions -mno-fp-exceptions @gol
-+-mvr4130-align -mno-vr4130-align}
-+
-+@emph{MMIX Options}
-+@gccoptlist{-mlibfuncs -mno-libfuncs -mepsilon -mno-epsilon -mabi=gnu @gol
-+-mabi=mmixware -mzero-extend -mknuthdiv -mtoplevel-symbols @gol
-+-melf -mbranch-predict -mno-branch-predict -mbase-addresses @gol
-+-mno-base-addresses -msingle-exit -mno-single-exit}
-+
-+@emph{MN10300 Options}
-+@gccoptlist{-mmult-bug -mno-mult-bug @gol
-+-mam33 -mno-am33 @gol
-+-mam33-2 -mno-am33-2 @gol
-+-mreturn-pointer-on-d0 @gol
-+-mno-crt0 -mrelax}
-+
-+@emph{PDP-11 Options}
-+@gccoptlist{-mfpu -msoft-float -mac0 -mno-ac0 -m40 -m45 -m10 @gol
-+-mbcopy -mbcopy-builtin -mint32 -mno-int16 @gol
-+-mint16 -mno-int32 -mfloat32 -mno-float64 @gol
-+-mfloat64 -mno-float32 -mabshi -mno-abshi @gol
-+-mbranch-expensive -mbranch-cheap @gol
-+-msplit -mno-split -munix-asm -mdec-asm}
-+
-+@emph{picoChip Options}
-+@gccoptlist{-mae=@var{ae_type} -mvliw-lookahead=@var{N}
-+-msymbol-as-address -mno-inefficient-warnings}
-+
-+@emph{PowerPC Options}
-+See RS/6000 and PowerPC Options.
-+
-+@emph{RS/6000 and PowerPC Options}
-+@gccoptlist{-mcpu=@var{cpu-type} @gol
-+-mtune=@var{cpu-type} @gol
-+-mpower -mno-power -mpower2 -mno-power2 @gol
-+-mpowerpc -mpowerpc64 -mno-powerpc @gol
-+-maltivec -mno-altivec @gol
-+-mpowerpc-gpopt -mno-powerpc-gpopt @gol
-+-mpowerpc-gfxopt -mno-powerpc-gfxopt @gol
-+-mmfcrf -mno-mfcrf -mpopcntb -mno-popcntb -mfprnd -mno-fprnd @gol
-+-mcmpb -mno-cmpb -mmfpgpr -mno-mfpgpr -mhard-dfp -mno-hard-dfp @gol
-+-mnew-mnemonics -mold-mnemonics @gol
-+-mfull-toc -mminimal-toc -mno-fp-in-toc -mno-sum-in-toc @gol
-+-m64 -m32 -mxl-compat -mno-xl-compat -mpe @gol
-+-malign-power -malign-natural @gol
-+-msoft-float -mhard-float -mmultiple -mno-multiple @gol
-+-msingle-float -mdouble-float -msimple-fpu @gol
-+-mstring -mno-string -mupdate -mno-update @gol
-+-mavoid-indexed-addresses -mno-avoid-indexed-addresses @gol
-+-mfused-madd -mno-fused-madd -mbit-align -mno-bit-align @gol
-+-mstrict-align -mno-strict-align -mrelocatable @gol
-+-mno-relocatable -mrelocatable-lib -mno-relocatable-lib @gol
-+-mtoc -mno-toc -mlittle -mlittle-endian -mbig -mbig-endian @gol
-+-mdynamic-no-pic -maltivec -mswdiv @gol
-+-mprioritize-restricted-insns=@var{priority} @gol
-+-msched-costly-dep=@var{dependence_type} @gol
-+-minsert-sched-nops=@var{scheme} @gol
-+-mcall-sysv -mcall-netbsd @gol
-+-maix-struct-return -msvr4-struct-return @gol
-+-mabi=@var{abi-type} -msecure-plt -mbss-plt @gol
-+-misel -mno-isel @gol
-+-misel=yes -misel=no @gol
-+-mspe -mno-spe @gol
-+-mspe=yes -mspe=no @gol
-+-mpaired @gol
-+-mgen-cell-microcode -mwarn-cell-microcode @gol
-+-mvrsave -mno-vrsave @gol
-+-mmulhw -mno-mulhw @gol
-+-mdlmzb -mno-dlmzb @gol
-+-mfloat-gprs=yes -mfloat-gprs=no -mfloat-gprs=single -mfloat-gprs=double @gol
-+-mprototype -mno-prototype @gol
-+-msim -mmvme -mads -myellowknife -memb -msdata @gol
-+-msdata=@var{opt} -mvxworks -G @var{num} -pthread}
-+
-+@emph{S/390 and zSeries Options}
-+@gccoptlist{-mtune=@var{cpu-type} -march=@var{cpu-type} @gol
-+-mhard-float -msoft-float -mhard-dfp -mno-hard-dfp @gol
-+-mlong-double-64 -mlong-double-128 @gol
-+-mbackchain -mno-backchain -mpacked-stack -mno-packed-stack @gol
-+-msmall-exec -mno-small-exec -mmvcle -mno-mvcle @gol
-+-m64 -m31 -mdebug -mno-debug -mesa -mzarch @gol
-+-mtpf-trace -mno-tpf-trace -mfused-madd -mno-fused-madd @gol
-+-mwarn-framesize -mwarn-dynamicstack -mstack-size -mstack-guard}
-+
-+@emph{Score Options}
-+@gccoptlist{-meb -mel @gol
-+-mnhwloop @gol
-+-muls @gol
-+-mmac @gol
-+-mscore5 -mscore5u -mscore7 -mscore7d}
-+
-+@emph{SH Options}
-+@gccoptlist{-m1 -m2 -m2e -m3 -m3e @gol
-+-m4-nofpu -m4-single-only -m4-single -m4 @gol
-+-m4a-nofpu -m4a-single-only -m4a-single -m4a -m4al @gol
-+-m5-64media -m5-64media-nofpu @gol
-+-m5-32media -m5-32media-nofpu @gol
-+-m5-compact -m5-compact-nofpu @gol
-+-mb -ml -mdalign -mrelax @gol
-+-mbigtable -mfmovd -mhitachi -mrenesas -mno-renesas -mnomacsave @gol
-+-mieee -mbitops -misize -minline-ic_invalidate -mpadstruct -mspace @gol
-+-mprefergot -musermode -multcost=@var{number} -mdiv=@var{strategy} @gol
-+-mdivsi3_libfunc=@var{name} -mfixed-range=@var{register-range} @gol
-+-madjust-unroll -mindexed-addressing -mgettrcost=@var{number} -mpt-fixed @gol
-+-minvalid-symbols}
-+
-+@emph{SPARC Options}
-+@gccoptlist{-mcpu=@var{cpu-type} @gol
-+-mtune=@var{cpu-type} @gol
-+-mcmodel=@var{code-model} @gol
-+-m32 -m64 -mapp-regs -mno-app-regs @gol
-+-mfaster-structs -mno-faster-structs @gol
-+-mfpu -mno-fpu -mhard-float -msoft-float @gol
-+-mhard-quad-float -msoft-quad-float @gol
-+-mimpure-text -mno-impure-text -mlittle-endian @gol
-+-mstack-bias -mno-stack-bias @gol
-+-munaligned-doubles -mno-unaligned-doubles @gol
-+-mv8plus -mno-v8plus -mvis -mno-vis
-+-threads -pthreads -pthread}
-+
-+@emph{SPU Options}
-+@gccoptlist{-mwarn-reloc -merror-reloc @gol
-+-msafe-dma -munsafe-dma @gol
-+-mbranch-hints @gol
-+-msmall-mem -mlarge-mem -mstdmain @gol
-+-mfixed-range=@var{register-range}}
-+
-+@emph{System V Options}
-+@gccoptlist{-Qy -Qn -YP,@var{paths} -Ym,@var{dir}}
-+
-+@emph{V850 Options}
-+@gccoptlist{-mlong-calls -mno-long-calls -mep -mno-ep @gol
-+-mprolog-function -mno-prolog-function -mspace @gol
-+-mtda=@var{n} -msda=@var{n} -mzda=@var{n} @gol
-+-mapp-regs -mno-app-regs @gol
-+-mdisable-callt -mno-disable-callt @gol
-+-mv850e1 @gol
-+-mv850e @gol
-+-mv850 -mbig-switch}
-+
-+@emph{VAX Options}
-+@gccoptlist{-mg -mgnu -munix}
-+
-+@emph{VxWorks Options}
-+@gccoptlist{-mrtp -non-static -Bstatic -Bdynamic @gol
-+-Xbind-lazy -Xbind-now}
-+
-+@emph{x86-64 Options}
-+See i386 and x86-64 Options.
-+
-+@emph{Xstormy16 Options}
-+@gccoptlist{-msim}
-+
-+@emph{Xtensa Options}
-+@gccoptlist{-mconst16 -mno-const16 @gol
-+-mfused-madd -mno-fused-madd @gol
-+-mserialize-volatile -mno-serialize-volatile @gol
-+-mtext-section-literals -mno-text-section-literals @gol
-+-mtarget-align -mno-target-align @gol
-+-mlongcalls -mno-longcalls}
-+
-+@emph{zSeries Options}
-+See S/390 and zSeries Options.
-+
-+@item Code Generation Options
-+@xref{Code Gen Options,,Options for Code Generation Conventions}.
-+@gccoptlist{-fcall-saved-@var{reg} -fcall-used-@var{reg} @gol
-+-ffixed-@var{reg} -fexceptions @gol
-+-fnon-call-exceptions -funwind-tables @gol
-+-fasynchronous-unwind-tables @gol
-+-finhibit-size-directive -finstrument-functions @gol
-+-finstrument-functions-exclude-function-list=@var{sym},@var{sym},@dots{} @gol
-+-finstrument-functions-exclude-file-list=@var{file},@var{file},@dots{} @gol
-+-fno-common -fno-ident @gol
-+-fpcc-struct-return -fpic -fPIC -fpie -fPIE @gol
-+-fno-jump-tables @gol
-+-frecord-gcc-switches @gol
-+-freg-struct-return -fshort-enums @gol
-+-fshort-double -fshort-wchar @gol
-+-fverbose-asm -fpack-struct[=@var{n}] -fstack-check @gol
-+-fstack-limit-register=@var{reg} -fstack-limit-symbol=@var{sym} @gol
-+-fno-stack-limit -fargument-alias -fargument-noalias @gol
-+-fargument-noalias-global -fargument-noalias-anything @gol
-+-fleading-underscore -ftls-model=@var{model} @gol
-+-ftrapv -fwrapv -fbounds-check @gol
-+-fvisibility}
-+@end table
-+
-+@menu
-+* Overall Options:: Controlling the kind of output:
-+ an executable, object files, assembler files,
-+ or preprocessed source.
-+* C Dialect Options:: Controlling the variant of C language compiled.
-+* C++ Dialect Options:: Variations on C++.
-+* Objective-C and Objective-C++ Dialect Options:: Variations on Objective-C
-+ and Objective-C++.
-+* Language Independent Options:: Controlling how diagnostics should be
-+ formatted.
-+* Warning Options:: How picky should the compiler be?
-+* Debugging Options:: Symbol tables, measurements, and debugging dumps.
-+* Optimize Options:: How much optimization?
-+* Preprocessor Options:: Controlling header files and macro definitions.
-+ Also, getting dependency information for Make.
-+* Assembler Options:: Passing options to the assembler.
-+* Link Options:: Specifying libraries and so on.
-+* Directory Options:: Where to find header files and libraries.
-+ Where to find the compiler executable files.
-+* Spec Files:: How to pass switches to sub-processes.
-+* Target Options:: Running a cross-compiler, or an old version of GCC.
-+@end menu
-+
-+@node Overall Options
-+@section Options Controlling the Kind of Output
-+
-+Compilation can involve up to four stages: preprocessing, compilation
-+proper, assembly and linking, always in that order. GCC is capable of
-+preprocessing and compiling several files either into several
-+assembler input files, or into one assembler input file; then each
-+assembler input file produces an object file, and linking combines all
-+the object files (those newly compiled, and those specified as input)
-+into an executable file.
-+
-+@cindex file name suffix
-+For any given input file, the file name suffix determines what kind of
-+compilation is done:
-+
-+@table @gcctabopt
-+@item @var{file}.c
-+C source code which must be preprocessed.
-+
-+@item @var{file}.i
-+C source code which should not be preprocessed.
-+
-+@item @var{file}.ii
-+C++ source code which should not be preprocessed.
-+
-+@item @var{file}.m
-+Objective-C source code. Note that you must link with the @file{libobjc}
-+library to make an Objective-C program work.
-+
-+@item @var{file}.mi
-+Objective-C source code which should not be preprocessed.
-+
-+@item @var{file}.mm
-+@itemx @var{file}.M
-+Objective-C++ source code. Note that you must link with the @file{libobjc}
-+library to make an Objective-C++ program work. Note that @samp{.M} refers
-+to a literal capital M@.
-+
-+@item @var{file}.mii
-+Objective-C++ source code which should not be preprocessed.
-+
-+@item @var{file}.h
-+C, C++, Objective-C or Objective-C++ header file to be turned into a
-+precompiled header.
-+
-+@item @var{file}.cc
-+@itemx @var{file}.cp
-+@itemx @var{file}.cxx
-+@itemx @var{file}.cpp
-+@itemx @var{file}.CPP
-+@itemx @var{file}.c++
-+@itemx @var{file}.C
-+C++ source code which must be preprocessed. Note that in @samp{.cxx},
-+the last two letters must both be literally @samp{x}. Likewise,
-+@samp{.C} refers to a literal capital C@.
-+
-+@item @var{file}.mm
-+@itemx @var{file}.M
-+Objective-C++ source code which must be preprocessed.
-+
-+@item @var{file}.mii
-+Objective-C++ source code which should not be preprocessed.
-+
-+@item @var{file}.hh
-+@itemx @var{file}.H
-+@itemx @var{file}.hp
-+@itemx @var{file}.hxx
-+@itemx @var{file}.hpp
-+@itemx @var{file}.HPP
-+@itemx @var{file}.h++
-+@itemx @var{file}.tcc
-+C++ header file to be turned into a precompiled header.
-+
-+@item @var{file}.f
-+@itemx @var{file}.for
-+@itemx @var{file}.ftn
-+Fixed form Fortran source code which should not be preprocessed.
-+
-+@item @var{file}.F
-+@itemx @var{file}.FOR
-+@itemx @var{file}.fpp
-+@itemx @var{file}.FPP
-+@itemx @var{file}.FTN
-+Fixed form Fortran source code which must be preprocessed (with the traditional
-+preprocessor).
-+
-+@item @var{file}.f90
-+@itemx @var{file}.f95
-+@itemx @var{file}.f03
-+@itemx @var{file}.f08
-+Free form Fortran source code which should not be preprocessed.
-+
-+@item @var{file}.F90
-+@itemx @var{file}.F95
-+@itemx @var{file}.F03
-+@itemx @var{file}.F08
-+Free form Fortran source code which must be preprocessed (with the
-+traditional preprocessor).
-+
-+@c FIXME: Descriptions of Java file types.
-+@c @var{file}.java
-+@c @var{file}.class
-+@c @var{file}.zip
-+@c @var{file}.jar
-+
-+@item @var{file}.ads
-+Ada source code file which contains a library unit declaration (a
-+declaration of a package, subprogram, or generic, or a generic
-+instantiation), or a library unit renaming declaration (a package,
-+generic, or subprogram renaming declaration). Such files are also
-+called @dfn{specs}.
-+
-+@item @var{file}.adb
-+Ada source code file containing a library unit body (a subprogram or
-+package body). Such files are also called @dfn{bodies}.
-+
-+@c GCC also knows about some suffixes for languages not yet included:
-+@c Pascal:
-+@c @var{file}.p
-+@c @var{file}.pas
-+@c Ratfor:
-+@c @var{file}.r
-+
-+@item @var{file}.s
-+Assembler code.
-+
-+@item @var{file}.S
-+@itemx @var{file}.sx
-+Assembler code which must be preprocessed.
-+
-+@item @var{other}
-+An object file to be fed straight into linking.
-+Any file name with no recognized suffix is treated this way.
-+@end table
-+
-+@opindex x
-+You can specify the input language explicitly with the @option{-x} option:
-+
-+@table @gcctabopt
-+@item -x @var{language}
-+Specify explicitly the @var{language} for the following input files
-+(rather than letting the compiler choose a default based on the file
-+name suffix). This option applies to all following input files until
-+the next @option{-x} option. Possible values for @var{language} are:
-+@smallexample
-+c c-header c-cpp-output
-+c++ c++-header c++-cpp-output
-+objective-c objective-c-header objective-c-cpp-output
-+objective-c++ objective-c++-header objective-c++-cpp-output
-+assembler assembler-with-cpp
-+ada
-+f77 f77-cpp-input f95 f95-cpp-input
-+java
-+@end smallexample
-+
-+@item -x none
-+Turn off any specification of a language, so that subsequent files are
-+handled according to their file name suffixes (as they are if @option{-x}
-+has not been used at all).
-+
-+@item -pass-exit-codes
-+@opindex pass-exit-codes
-+Normally the @command{gcc} program will exit with the code of 1 if any
-+phase of the compiler returns a non-success return code. If you specify
-+@option{-pass-exit-codes}, the @command{gcc} program will instead return with
-+numerically highest error produced by any phase that returned an error
-+indication. The C, C++, and Fortran frontends return 4, if an internal
-+compiler error is encountered.
-+@end table
-+
-+If you only want some of the stages of compilation, you can use
-+@option{-x} (or filename suffixes) to tell @command{gcc} where to start, and
-+one of the options @option{-c}, @option{-S}, or @option{-E} to say where
-+@command{gcc} is to stop. Note that some combinations (for example,
-+@samp{-x cpp-output -E}) instruct @command{gcc} to do nothing at all.
-+
-+@table @gcctabopt
-+@item -c
-+@opindex c
-+Compile or assemble the source files, but do not link. The linking
-+stage simply is not done. The ultimate output is in the form of an
-+object file for each source file.
-+
-+By default, the object file name for a source file is made by replacing
-+the suffix @samp{.c}, @samp{.i}, @samp{.s}, etc., with @samp{.o}.
-+
-+Unrecognized input files, not requiring compilation or assembly, are
-+ignored.
-+
-+@item -S
-+@opindex S
-+Stop after the stage of compilation proper; do not assemble. The output
-+is in the form of an assembler code file for each non-assembler input
-+file specified.
-+
-+By default, the assembler file name for a source file is made by
-+replacing the suffix @samp{.c}, @samp{.i}, etc., with @samp{.s}.
-+
-+Input files that don't require compilation are ignored.
-+
-+@item -E
-+@opindex E
-+Stop after the preprocessing stage; do not run the compiler proper. The
-+output is in the form of preprocessed source code, which is sent to the
-+standard output.
-+
-+Input files which don't require preprocessing are ignored.
-+
-+@cindex output file option
-+@item -o @var{file}
-+@opindex o
-+Place output in file @var{file}. This applies regardless to whatever
-+sort of output is being produced, whether it be an executable file,
-+an object file, an assembler file or preprocessed C code.
-+
-+If @option{-o} is not specified, the default is to put an executable
-+file in @file{a.out}, the object file for
-+@file{@var{source}.@var{suffix}} in @file{@var{source}.o}, its
-+assembler file in @file{@var{source}.s}, a precompiled header file in
-+@file{@var{source}.@var{suffix}.gch}, and all preprocessed C source on
-+standard output.
-+
-+@item -v
-+@opindex v
-+Print (on standard error output) the commands executed to run the stages
-+of compilation. Also print the version number of the compiler driver
-+program and of the preprocessor and the compiler proper.
-+
-+@item -###
-+@opindex ###
-+Like @option{-v} except the commands are not executed and all command
-+arguments are quoted. This is useful for shell scripts to capture the
-+driver-generated command lines.
-+
-+@item -pipe
-+@opindex pipe
-+Use pipes rather than temporary files for communication between the
-+various stages of compilation. This fails to work on some systems where
-+the assembler is unable to read from a pipe; but the GNU assembler has
-+no trouble.
-+
-+@item -combine
-+@opindex combine
-+If you are compiling multiple source files, this option tells the driver
-+to pass all the source files to the compiler at once (for those
-+languages for which the compiler can handle this). This will allow
-+intermodule analysis (IMA) to be performed by the compiler. Currently the only
-+language for which this is supported is C@. If you pass source files for
-+multiple languages to the driver, using this option, the driver will invoke
-+the compiler(s) that support IMA once each, passing each compiler all the
-+source files appropriate for it. For those languages that do not support
-+IMA this option will be ignored, and the compiler will be invoked once for
-+each source file in that language. If you use this option in conjunction
-+with @option{-save-temps}, the compiler will generate multiple
-+pre-processed files
-+(one for each source file), but only one (combined) @file{.o} or
-+@file{.s} file.
-+
-+@item --help
-+@opindex help
-+Print (on the standard output) a description of the command line options
-+understood by @command{gcc}. If the @option{-v} option is also specified
-+then @option{--help} will also be passed on to the various processes
-+invoked by @command{gcc}, so that they can display the command line options
-+they accept. If the @option{-Wextra} option has also been specified
-+(prior to the @option{--help} option), then command line options which
-+have no documentation associated with them will also be displayed.
-+
-+@item --target-help
-+@opindex target-help
-+Print (on the standard output) a description of target-specific command
-+line options for each tool. For some targets extra target-specific
-+information may also be printed.
-+
-+@item --help=@{@var{class}@r{|[}^@r{]}@var{qualifier}@}@r{[},@dots{}@r{]}
-+Print (on the standard output) a description of the command line
-+options understood by the compiler that fit into all specified classes
-+and qualifiers. These are the supported classes:
-+
-+@table @asis
-+@item @samp{optimizers}
-+This will display all of the optimization options supported by the
-+compiler.
-+
-+@item @samp{warnings}
-+This will display all of the options controlling warning messages
-+produced by the compiler.
-+
-+@item @samp{target}
-+This will display target-specific options. Unlike the
-+@option{--target-help} option however, target-specific options of the
-+linker and assembler will not be displayed. This is because those
-+tools do not currently support the extended @option{--help=} syntax.
-+
-+@item @samp{params}
-+This will display the values recognized by the @option{--param}
-+option.
-+
-+@item @var{language}
-+This will display the options supported for @var{language}, where
-+@var{language} is the name of one of the languages supported in this
-+version of GCC.
-+
-+@item @samp{common}
-+This will display the options that are common to all languages.
-+@end table
-+
-+These are the supported qualifiers:
-+
-+@table @asis
-+@item @samp{undocumented}
-+Display only those options which are undocumented.
-+
-+@item @samp{joined}
-+Display options which take an argument that appears after an equal
-+sign in the same continuous piece of text, such as:
-+@samp{--help=target}.
-+
-+@item @samp{separate}
-+Display options which take an argument that appears as a separate word
-+following the original option, such as: @samp{-o output-file}.
-+@end table
-+
-+Thus for example to display all the undocumented target-specific
-+switches supported by the compiler the following can be used:
-+
-+@smallexample
-+--help=target,undocumented
-+@end smallexample
-+
-+The sense of a qualifier can be inverted by prefixing it with the
-+@samp{^} character, so for example to display all binary warning
-+options (i.e., ones that are either on or off and that do not take an
-+argument), which have a description the following can be used:
-+
-+@smallexample
-+--help=warnings,^joined,^undocumented
-+@end smallexample
-+
-+The argument to @option{--help=} should not consist solely of inverted
-+qualifiers.
-+
-+Combining several classes is possible, although this usually
-+restricts the output by so much that there is nothing to display. One
-+case where it does work however is when one of the classes is
-+@var{target}. So for example to display all the target-specific
-+optimization options the following can be used:
-+
-+@smallexample
-+--help=target,optimizers
-+@end smallexample
-+
-+The @option{--help=} option can be repeated on the command line. Each
-+successive use will display its requested class of options, skipping
-+those that have already been displayed.
-+
-+If the @option{-Q} option appears on the command line before the
-+@option{--help=} option, then the descriptive text displayed by
-+@option{--help=} is changed. Instead of describing the displayed
-+options, an indication is given as to whether the option is enabled,
-+disabled or set to a specific value (assuming that the compiler
-+knows this at the point where the @option{--help=} option is used).
-+
-+Here is a truncated example from the ARM port of @command{gcc}:
-+
-+@smallexample
-+ % gcc -Q -mabi=2 --help=target -c
-+ The following options are target specific:
-+ -mabi= 2
-+ -mabort-on-noreturn [disabled]
-+ -mapcs [disabled]
-+@end smallexample
-+
-+The output is sensitive to the effects of previous command line
-+options, so for example it is possible to find out which optimizations
-+are enabled at @option{-O2} by using:
-+
-+@smallexample
-+-Q -O2 --help=optimizers
-+@end smallexample
-+
-+Alternatively you can discover which binary optimizations are enabled
-+by @option{-O3} by using:
-+
-+@smallexample
-+gcc -c -Q -O3 --help=optimizers > /tmp/O3-opts
-+gcc -c -Q -O2 --help=optimizers > /tmp/O2-opts
-+diff /tmp/O2-opts /tmp/O3-opts | grep enabled
-+@end smallexample
-+
-+@item --version
-+@opindex version
-+Display the version number and copyrights of the invoked GCC@.
-+
-+@item -wrapper
-+@opindex wrapper
-+Invoke all subcommands under a wrapper program. It takes a single
-+comma separated list as an argument, which will be used to invoke
-+the wrapper:
-+
-+@smallexample
-+gcc -c t.c -wrapper gdb,--args
-+@end smallexample
-+
-+This will invoke all subprograms of gcc under "gdb --args",
-+thus cc1 invocation will be "gdb --args cc1 ...".
-+
-+@include @value{srcdir}/../libiberty/at-file.texi
-+@end table
-+
-+@node Invoking G++
-+@section Compiling C++ Programs
-+
-+@cindex suffixes for C++ source
-+@cindex C++ source file suffixes
-+C++ source files conventionally use one of the suffixes @samp{.C},
-+@samp{.cc}, @samp{.cpp}, @samp{.CPP}, @samp{.c++}, @samp{.cp}, or
-+@samp{.cxx}; C++ header files often use @samp{.hh}, @samp{.hpp},
-+@samp{.H}, or (for shared template code) @samp{.tcc}; and
-+preprocessed C++ files use the suffix @samp{.ii}. GCC recognizes
-+files with these names and compiles them as C++ programs even if you
-+call the compiler the same way as for compiling C programs (usually
-+with the name @command{gcc}).
-+
-+@findex g++
-+@findex c++
-+However, the use of @command{gcc} does not add the C++ library.
-+@command{g++} is a program that calls GCC and treats @samp{.c},
-+@samp{.h} and @samp{.i} files as C++ source files instead of C source
-+files unless @option{-x} is used, and automatically specifies linking
-+against the C++ library. This program is also useful when
-+precompiling a C header file with a @samp{.h} extension for use in C++
-+compilations. On many systems, @command{g++} is also installed with
-+the name @command{c++}.
-+
-+@cindex invoking @command{g++}
-+When you compile C++ programs, you may specify many of the same
-+command-line options that you use for compiling programs in any
-+language; or command-line options meaningful for C and related
-+languages; or options that are meaningful only for C++ programs.
-+@xref{C Dialect Options,,Options Controlling C Dialect}, for
-+explanations of options for languages related to C@.
-+@xref{C++ Dialect Options,,Options Controlling C++ Dialect}, for
-+explanations of options that are meaningful only for C++ programs.
-+
-+@node C Dialect Options
-+@section Options Controlling C Dialect
-+@cindex dialect options
-+@cindex language dialect options
-+@cindex options, dialect
-+
-+The following options control the dialect of C (or languages derived
-+from C, such as C++, Objective-C and Objective-C++) that the compiler
-+accepts:
-+
-+@table @gcctabopt
-+@cindex ANSI support
-+@cindex ISO support
-+@item -ansi
-+@opindex ansi
-+In C mode, this is equivalent to @samp{-std=c89}. In C++ mode, it is
-+equivalent to @samp{-std=c++98}.
-+
-+This turns off certain features of GCC that are incompatible with ISO
-+C90 (when compiling C code), or of standard C++ (when compiling C++ code),
-+such as the @code{asm} and @code{typeof} keywords, and
-+predefined macros such as @code{unix} and @code{vax} that identify the
-+type of system you are using. It also enables the undesirable and
-+rarely used ISO trigraph feature. For the C compiler,
-+it disables recognition of C++ style @samp{//} comments as well as
-+the @code{inline} keyword.
-+
-+The alternate keywords @code{__asm__}, @code{__extension__},
-+@code{__inline__} and @code{__typeof__} continue to work despite
-+@option{-ansi}. You would not want to use them in an ISO C program, of
-+course, but it is useful to put them in header files that might be included
-+in compilations done with @option{-ansi}. Alternate predefined macros
-+such as @code{__unix__} and @code{__vax__} are also available, with or
-+without @option{-ansi}.
-+
-+The @option{-ansi} option does not cause non-ISO programs to be
-+rejected gratuitously. For that, @option{-pedantic} is required in
-+addition to @option{-ansi}. @xref{Warning Options}.
-+
-+The macro @code{__STRICT_ANSI__} is predefined when the @option{-ansi}
-+option is used. Some header files may notice this macro and refrain
-+from declaring certain functions or defining certain macros that the
-+ISO standard doesn't call for; this is to avoid interfering with any
-+programs that might use these names for other things.
-+
-+Functions that would normally be built in but do not have semantics
-+defined by ISO C (such as @code{alloca} and @code{ffs}) are not built-in
-+functions when @option{-ansi} is used. @xref{Other Builtins,,Other
-+built-in functions provided by GCC}, for details of the functions
-+affected.
-+
-+@item -std=
-+@opindex std
-+Determine the language standard. @xref{Standards,,Language Standards
-+Supported by GCC}, for details of these standard versions. This option
-+is currently only supported when compiling C or C++.
-+
-+The compiler can accept several base standards, such as @samp{c89} or
-+@samp{c++98}, and GNU dialects of those standards, such as
-+@samp{gnu89} or @samp{gnu++98}. By specifying a base standard, the
-+compiler will accept all programs following that standard and those
-+using GNU extensions that do not contradict it. For example,
-+@samp{-std=c89} turns off certain features of GCC that are
-+incompatible with ISO C90, such as the @code{asm} and @code{typeof}
-+keywords, but not other GNU extensions that do not have a meaning in
-+ISO C90, such as omitting the middle term of a @code{?:}
-+expression. On the other hand, by specifying a GNU dialect of a
-+standard, all features the compiler support are enabled, even when
-+those features change the meaning of the base standard and some
-+strict-conforming programs may be rejected. The particular standard
-+is used by @option{-pedantic} to identify which features are GNU
-+extensions given that version of the standard. For example
-+@samp{-std=gnu89 -pedantic} would warn about C++ style @samp{//}
-+comments, while @samp{-std=gnu99 -pedantic} would not.
-+
-+A value for this option must be provided; possible values are
-+
-+@table @samp
-+@item c89
-+@itemx iso9899:1990
-+Support all ISO C90 programs (certain GNU extensions that conflict
-+with ISO C90 are disabled). Same as @option{-ansi} for C code.
-+
-+@item iso9899:199409
-+ISO C90 as modified in amendment 1.
-+
-+@item c99
-+@itemx c9x
-+@itemx iso9899:1999
-+@itemx iso9899:199x
-+ISO C99. Note that this standard is not yet fully supported; see
-+@w{@uref{http://gcc.gnu.org/gcc-4.4/c99status.html}} for more information. The
-+names @samp{c9x} and @samp{iso9899:199x} are deprecated.
-+
-+@item gnu89
-+GNU dialect of ISO C90 (including some C99 features). This
-+is the default for C code.
-+
-+@item gnu99
-+@itemx gnu9x
-+GNU dialect of ISO C99. When ISO C99 is fully implemented in GCC,
-+this will become the default. The name @samp{gnu9x} is deprecated.
-+
-+@item c++98
-+The 1998 ISO C++ standard plus amendments. Same as @option{-ansi} for
-+C++ code.
-+
-+@item gnu++98
-+GNU dialect of @option{-std=c++98}. This is the default for
-+C++ code.
-+
-+@item c++0x
-+The working draft of the upcoming ISO C++0x standard. This option
-+enables experimental features that are likely to be included in
-+C++0x. The working draft is constantly changing, and any feature that is
-+enabled by this flag may be removed from future versions of GCC if it is
-+not part of the C++0x standard.
-+
-+@item gnu++0x
-+GNU dialect of @option{-std=c++0x}. This option enables
-+experimental features that may be removed in future versions of GCC.
-+@end table
-+
-+@item -fgnu89-inline
-+@opindex fgnu89-inline
-+The option @option{-fgnu89-inline} tells GCC to use the traditional
-+GNU semantics for @code{inline} functions when in C99 mode.
-+@xref{Inline,,An Inline Function is As Fast As a Macro}. This option
-+is accepted and ignored by GCC versions 4.1.3 up to but not including
-+4.3. In GCC versions 4.3 and later it changes the behavior of GCC in
-+C99 mode. Using this option is roughly equivalent to adding the
-+@code{gnu_inline} function attribute to all inline functions
-+(@pxref{Function Attributes}).
-+
-+The option @option{-fno-gnu89-inline} explicitly tells GCC to use the
-+C99 semantics for @code{inline} when in C99 or gnu99 mode (i.e., it
-+specifies the default behavior). This option was first supported in
-+GCC 4.3. This option is not supported in C89 or gnu89 mode.
-+
-+The preprocessor macros @code{__GNUC_GNU_INLINE__} and
-+@code{__GNUC_STDC_INLINE__} may be used to check which semantics are
-+in effect for @code{inline} functions. @xref{Common Predefined
-+Macros,,,cpp,The C Preprocessor}.
-+
-+@item -aux-info @var{filename}
-+@opindex aux-info
-+Output to the given filename prototyped declarations for all functions
-+declared and/or defined in a translation unit, including those in header
-+files. This option is silently ignored in any language other than C@.
-+
-+Besides declarations, the file indicates, in comments, the origin of
-+each declaration (source file and line), whether the declaration was
-+implicit, prototyped or unprototyped (@samp{I}, @samp{N} for new or
-+@samp{O} for old, respectively, in the first character after the line
-+number and the colon), and whether it came from a declaration or a
-+definition (@samp{C} or @samp{F}, respectively, in the following
-+character). In the case of function definitions, a K&R-style list of
-+arguments followed by their declarations is also provided, inside
-+comments, after the declaration.
-+
-+@item -fno-asm
-+@opindex fno-asm
-+Do not recognize @code{asm}, @code{inline} or @code{typeof} as a
-+keyword, so that code can use these words as identifiers. You can use
-+the keywords @code{__asm__}, @code{__inline__} and @code{__typeof__}
-+instead. @option{-ansi} implies @option{-fno-asm}.
-+
-+In C++, this switch only affects the @code{typeof} keyword, since
-+@code{asm} and @code{inline} are standard keywords. You may want to
-+use the @option{-fno-gnu-keywords} flag instead, which has the same
-+effect. In C99 mode (@option{-std=c99} or @option{-std=gnu99}), this
-+switch only affects the @code{asm} and @code{typeof} keywords, since
-+@code{inline} is a standard keyword in ISO C99.
-+
-+@item -fno-builtin
-+@itemx -fno-builtin-@var{function}
-+@opindex fno-builtin
-+@cindex built-in functions
-+Don't recognize built-in functions that do not begin with
-+@samp{__builtin_} as prefix. @xref{Other Builtins,,Other built-in
-+functions provided by GCC}, for details of the functions affected,
-+including those which are not built-in functions when @option{-ansi} or
-+@option{-std} options for strict ISO C conformance are used because they
-+do not have an ISO standard meaning.
-+
-+GCC normally generates special code to handle certain built-in functions
-+more efficiently; for instance, calls to @code{alloca} may become single
-+instructions that adjust the stack directly, and calls to @code{memcpy}
-+may become inline copy loops. The resulting code is often both smaller
-+and faster, but since the function calls no longer appear as such, you
-+cannot set a breakpoint on those calls, nor can you change the behavior
-+of the functions by linking with a different library. In addition,
-+when a function is recognized as a built-in function, GCC may use
-+information about that function to warn about problems with calls to
-+that function, or to generate more efficient code, even if the
-+resulting code still contains calls to that function. For example,
-+warnings are given with @option{-Wformat} for bad calls to
-+@code{printf}, when @code{printf} is built in, and @code{strlen} is
-+known not to modify global memory.
-+
-+With the @option{-fno-builtin-@var{function}} option
-+only the built-in function @var{function} is
-+disabled. @var{function} must not begin with @samp{__builtin_}. If a
-+function is named that is not built-in in this version of GCC, this
-+option is ignored. There is no corresponding
-+@option{-fbuiltin-@var{function}} option; if you wish to enable
-+built-in functions selectively when using @option{-fno-builtin} or
-+@option{-ffreestanding}, you may define macros such as:
-+
-+@smallexample
-+#define abs(n) __builtin_abs ((n))
-+#define strcpy(d, s) __builtin_strcpy ((d), (s))
-+@end smallexample
-+
-+@item -fhosted
-+@opindex fhosted
-+@cindex hosted environment
-+
-+Assert that compilation takes place in a hosted environment. This implies
-+@option{-fbuiltin}. A hosted environment is one in which the
-+entire standard library is available, and in which @code{main} has a return
-+type of @code{int}. Examples are nearly everything except a kernel.
-+This is equivalent to @option{-fno-freestanding}.
-+
-+@item -ffreestanding
-+@opindex ffreestanding
-+@cindex hosted environment
-+
-+Assert that compilation takes place in a freestanding environment. This
-+implies @option{-fno-builtin}. A freestanding environment
-+is one in which the standard library may not exist, and program startup may
-+not necessarily be at @code{main}. The most obvious example is an OS kernel.
-+This is equivalent to @option{-fno-hosted}.
-+
-+@xref{Standards,,Language Standards Supported by GCC}, for details of
-+freestanding and hosted environments.
-+
-+@item -fopenmp
-+@opindex fopenmp
-+@cindex openmp parallel
-+Enable handling of OpenMP directives @code{#pragma omp} in C/C++ and
-+@code{!$omp} in Fortran. When @option{-fopenmp} is specified, the
-+compiler generates parallel code according to the OpenMP Application
-+Program Interface v2.5 @w{@uref{http://www.openmp.org/}}. This option
-+implies @option{-pthread}, and thus is only supported on targets that
-+have support for @option{-pthread}.
-+
-+@item -fms-extensions
-+@opindex fms-extensions
-+Accept some non-standard constructs used in Microsoft header files.
-+
-+Some cases of unnamed fields in structures and unions are only
-+accepted with this option. @xref{Unnamed Fields,,Unnamed struct/union
-+fields within structs/unions}, for details.
-+
-+@item -trigraphs
-+@opindex trigraphs
-+Support ISO C trigraphs. The @option{-ansi} option (and @option{-std}
-+options for strict ISO C conformance) implies @option{-trigraphs}.
-+
-+@item -no-integrated-cpp
-+@opindex no-integrated-cpp
-+Performs a compilation in two passes: preprocessing and compiling. This
-+option allows a user supplied "cc1", "cc1plus", or "cc1obj" via the
-+@option{-B} option. The user supplied compilation step can then add in
-+an additional preprocessing step after normal preprocessing but before
-+compiling. The default is to use the integrated cpp (internal cpp)
-+
-+The semantics of this option will change if "cc1", "cc1plus", and
-+"cc1obj" are merged.
-+
-+@cindex traditional C language
-+@cindex C language, traditional
-+@item -traditional
-+@itemx -traditional-cpp
-+@opindex traditional-cpp
-+@opindex traditional
-+Formerly, these options caused GCC to attempt to emulate a pre-standard
-+C compiler. They are now only supported with the @option{-E} switch.
-+The preprocessor continues to support a pre-standard mode. See the GNU
-+CPP manual for details.
-+
-+@item -fcond-mismatch
-+@opindex fcond-mismatch
-+Allow conditional expressions with mismatched types in the second and
-+third arguments. The value of such an expression is void. This option
-+is not supported for C++.
-+
-+@item -flax-vector-conversions
-+@opindex flax-vector-conversions
-+Allow implicit conversions between vectors with differing numbers of
-+elements and/or incompatible element types. This option should not be
-+used for new code.
-+
-+@item -funsigned-char
-+@opindex funsigned-char
-+Let the type @code{char} be unsigned, like @code{unsigned char}.
-+
-+Each kind of machine has a default for what @code{char} should
-+be. It is either like @code{unsigned char} by default or like
-+@code{signed char} by default.
-+
-+Ideally, a portable program should always use @code{signed char} or
-+@code{unsigned char} when it depends on the signedness of an object.
-+But many programs have been written to use plain @code{char} and
-+expect it to be signed, or expect it to be unsigned, depending on the
-+machines they were written for. This option, and its inverse, let you
-+make such a program work with the opposite default.
-+
-+The type @code{char} is always a distinct type from each of
-+@code{signed char} or @code{unsigned char}, even though its behavior
-+is always just like one of those two.
-+
-+@item -fsigned-char
-+@opindex fsigned-char
-+Let the type @code{char} be signed, like @code{signed char}.
-+
-+Note that this is equivalent to @option{-fno-unsigned-char}, which is
-+the negative form of @option{-funsigned-char}. Likewise, the option
-+@option{-fno-signed-char} is equivalent to @option{-funsigned-char}.
-+
-+@item -fsigned-bitfields
-+@itemx -funsigned-bitfields
-+@itemx -fno-signed-bitfields
-+@itemx -fno-unsigned-bitfields
-+@opindex fsigned-bitfields
-+@opindex funsigned-bitfields
-+@opindex fno-signed-bitfields
-+@opindex fno-unsigned-bitfields
-+These options control whether a bit-field is signed or unsigned, when the
-+declaration does not use either @code{signed} or @code{unsigned}. By
-+default, such a bit-field is signed, because this is consistent: the
-+basic integer types such as @code{int} are signed types.
-+@end table
-+
-+@node C++ Dialect Options
-+@section Options Controlling C++ Dialect
-+
-+@cindex compiler options, C++
-+@cindex C++ options, command line
-+@cindex options, C++
-+This section describes the command-line options that are only meaningful
-+for C++ programs; but you can also use most of the GNU compiler options
-+regardless of what language your program is in. For example, you
-+might compile a file @code{firstClass.C} like this:
-+
-+@smallexample
-+g++ -g -frepo -O -c firstClass.C
-+@end smallexample
-+
-+@noindent
-+In this example, only @option{-frepo} is an option meant
-+only for C++ programs; you can use the other options with any
-+language supported by GCC@.
-+
-+Here is a list of options that are @emph{only} for compiling C++ programs:
-+
-+@table @gcctabopt
-+
-+@item -fabi-version=@var{n}
-+@opindex fabi-version
-+Use version @var{n} of the C++ ABI@. Version 2 is the version of the
-+C++ ABI that first appeared in G++ 3.4. Version 1 is the version of
-+the C++ ABI that first appeared in G++ 3.2. Version 0 will always be
-+the version that conforms most closely to the C++ ABI specification.
-+Therefore, the ABI obtained using version 0 will change as ABI bugs
-+are fixed.
-+
-+The default is version 2.
-+
-+@item -fno-access-control
-+@opindex fno-access-control
-+Turn off all access checking. This switch is mainly useful for working
-+around bugs in the access control code.
-+
-+@item -fcheck-new
-+@opindex fcheck-new
-+Check that the pointer returned by @code{operator new} is non-null
-+before attempting to modify the storage allocated. This check is
-+normally unnecessary because the C++ standard specifies that
-+@code{operator new} will only return @code{0} if it is declared
-+@samp{throw()}, in which case the compiler will always check the
-+return value even without this option. In all other cases, when
-+@code{operator new} has a non-empty exception specification, memory
-+exhaustion is signalled by throwing @code{std::bad_alloc}. See also
-+@samp{new (nothrow)}.
-+
-+@item -fconserve-space
-+@opindex fconserve-space
-+Put uninitialized or runtime-initialized global variables into the
-+common segment, as C does. This saves space in the executable at the
-+cost of not diagnosing duplicate definitions. If you compile with this
-+flag and your program mysteriously crashes after @code{main()} has
-+completed, you may have an object that is being destroyed twice because
-+two definitions were merged.
-+
-+This option is no longer useful on most targets, now that support has
-+been added for putting variables into BSS without making them common.
-+
-+@item -fno-deduce-init-list
-+@opindex fno-deduce-init-list
-+Disable deduction of a template type parameter as
-+std::initializer_list from a brace-enclosed initializer list, i.e.
-+
-+@smallexample
-+template <class T> auto forward(T t) -> decltype (realfn (t))
-+@{
-+ return realfn (t);
-+@}
-+
-+void f()
-+@{
-+ forward(@{1,2@}); // call forward<std::initializer_list<int>>
-+@}
-+@end smallexample
-+
-+This option is present because this deduction is an extension to the
-+current specification in the C++0x working draft, and there was
-+some concern about potential overload resolution problems.
-+
-+@item -ffriend-injection
-+@opindex ffriend-injection
-+Inject friend functions into the enclosing namespace, so that they are
-+visible outside the scope of the class in which they are declared.
-+Friend functions were documented to work this way in the old Annotated
-+C++ Reference Manual, and versions of G++ before 4.1 always worked
-+that way. However, in ISO C++ a friend function which is not declared
-+in an enclosing scope can only be found using argument dependent
-+lookup. This option causes friends to be injected as they were in
-+earlier releases.
-+
-+This option is for compatibility, and may be removed in a future
-+release of G++.
-+
-+@item -fno-elide-constructors
-+@opindex fno-elide-constructors
-+The C++ standard allows an implementation to omit creating a temporary
-+which is only used to initialize another object of the same type.
-+Specifying this option disables that optimization, and forces G++ to
-+call the copy constructor in all cases.
-+
-+@item -fno-enforce-eh-specs
-+@opindex fno-enforce-eh-specs
-+Don't generate code to check for violation of exception specifications
-+at runtime. This option violates the C++ standard, but may be useful
-+for reducing code size in production builds, much like defining
-+@samp{NDEBUG}. This does not give user code permission to throw
-+exceptions in violation of the exception specifications; the compiler
-+will still optimize based on the specifications, so throwing an
-+unexpected exception will result in undefined behavior.
-+
-+@item -ffor-scope
-+@itemx -fno-for-scope
-+@opindex ffor-scope
-+@opindex fno-for-scope
-+If @option{-ffor-scope} is specified, the scope of variables declared in
-+a @i{for-init-statement} is limited to the @samp{for} loop itself,
-+as specified by the C++ standard.
-+If @option{-fno-for-scope} is specified, the scope of variables declared in
-+a @i{for-init-statement} extends to the end of the enclosing scope,
-+as was the case in old versions of G++, and other (traditional)
-+implementations of C++.
-+
-+The default if neither flag is given to follow the standard,
-+but to allow and give a warning for old-style code that would
-+otherwise be invalid, or have different behavior.
-+
-+@item -fno-gnu-keywords
-+@opindex fno-gnu-keywords
-+Do not recognize @code{typeof} as a keyword, so that code can use this
-+word as an identifier. You can use the keyword @code{__typeof__} instead.
-+@option{-ansi} implies @option{-fno-gnu-keywords}.
-+
-+@item -fno-implicit-templates
-+@opindex fno-implicit-templates
-+Never emit code for non-inline templates which are instantiated
-+implicitly (i.e.@: by use); only emit code for explicit instantiations.
-+@xref{Template Instantiation}, for more information.
-+
-+@item -fno-implicit-inline-templates
-+@opindex fno-implicit-inline-templates
-+Don't emit code for implicit instantiations of inline templates, either.
-+The default is to handle inlines differently so that compiles with and
-+without optimization will need the same set of explicit instantiations.
-+
-+@item -fno-implement-inlines
-+@opindex fno-implement-inlines
-+To save space, do not emit out-of-line copies of inline functions
-+controlled by @samp{#pragma implementation}. This will cause linker
-+errors if these functions are not inlined everywhere they are called.
-+
-+@item -fms-extensions
-+@opindex fms-extensions
-+Disable pedantic warnings about constructs used in MFC, such as implicit
-+int and getting a pointer to member function via non-standard syntax.
-+
-+@item -fno-nonansi-builtins
-+@opindex fno-nonansi-builtins
-+Disable built-in declarations of functions that are not mandated by
-+ANSI/ISO C@. These include @code{ffs}, @code{alloca}, @code{_exit},
-+@code{index}, @code{bzero}, @code{conjf}, and other related functions.
-+
-+@item -fno-operator-names
-+@opindex fno-operator-names
-+Do not treat the operator name keywords @code{and}, @code{bitand},
-+@code{bitor}, @code{compl}, @code{not}, @code{or} and @code{xor} as
-+synonyms as keywords.
-+
-+@item -fno-optional-diags
-+@opindex fno-optional-diags
-+Disable diagnostics that the standard says a compiler does not need to
-+issue. Currently, the only such diagnostic issued by G++ is the one for
-+a name having multiple meanings within a class.
-+
-+@item -fpermissive
-+@opindex fpermissive
-+Downgrade some diagnostics about nonconformant code from errors to
-+warnings. Thus, using @option{-fpermissive} will allow some
-+nonconforming code to compile.
-+
-+@item -frepo
-+@opindex frepo
-+Enable automatic template instantiation at link time. This option also
-+implies @option{-fno-implicit-templates}. @xref{Template
-+Instantiation}, for more information.
-+
-+@item -fno-rtti
-+@opindex fno-rtti
-+Disable generation of information about every class with virtual
-+functions for use by the C++ runtime type identification features
-+(@samp{dynamic_cast} and @samp{typeid}). If you don't use those parts
-+of the language, you can save some space by using this flag. Note that
-+exception handling uses the same information, but it will generate it as
-+needed. The @samp{dynamic_cast} operator can still be used for casts that
-+do not require runtime type information, i.e.@: casts to @code{void *} or to
-+unambiguous base classes.
-+
-+@item -fstats
-+@opindex fstats
-+Emit statistics about front-end processing at the end of the compilation.
-+This information is generally only useful to the G++ development team.
-+
-+@item -ftemplate-depth-@var{n}
-+@opindex ftemplate-depth
-+Set the maximum instantiation depth for template classes to @var{n}.
-+A limit on the template instantiation depth is needed to detect
-+endless recursions during template class instantiation. ANSI/ISO C++
-+conforming programs must not rely on a maximum depth greater than 17.
-+
-+@item -fno-threadsafe-statics
-+@opindex fno-threadsafe-statics
-+Do not emit the extra code to use the routines specified in the C++
-+ABI for thread-safe initialization of local statics. You can use this
-+option to reduce code size slightly in code that doesn't need to be
-+thread-safe.
-+
-+@item -fuse-cxa-atexit
-+@opindex fuse-cxa-atexit
-+Register destructors for objects with static storage duration with the
-+@code{__cxa_atexit} function rather than the @code{atexit} function.
-+This option is required for fully standards-compliant handling of static
-+destructors, but will only work if your C library supports
-+@code{__cxa_atexit}.
-+
-+@item -fno-use-cxa-get-exception-ptr
-+@opindex fno-use-cxa-get-exception-ptr
-+Don't use the @code{__cxa_get_exception_ptr} runtime routine. This
-+will cause @code{std::uncaught_exception} to be incorrect, but is necessary
-+if the runtime routine is not available.
-+
-+@item -fvisibility-inlines-hidden
-+@opindex fvisibility-inlines-hidden
-+This switch declares that the user does not attempt to compare
-+pointers to inline methods where the addresses of the two functions
-+were taken in different shared objects.
-+
-+The effect of this is that GCC may, effectively, mark inline methods with
-+@code{__attribute__ ((visibility ("hidden")))} so that they do not
-+appear in the export table of a DSO and do not require a PLT indirection
-+when used within the DSO@. Enabling this option can have a dramatic effect
-+on load and link times of a DSO as it massively reduces the size of the
-+dynamic export table when the library makes heavy use of templates.
-+
-+The behavior of this switch is not quite the same as marking the
-+methods as hidden directly, because it does not affect static variables
-+local to the function or cause the compiler to deduce that
-+the function is defined in only one shared object.
-+
-+You may mark a method as having a visibility explicitly to negate the
-+effect of the switch for that method. For example, if you do want to
-+compare pointers to a particular inline method, you might mark it as
-+having default visibility. Marking the enclosing class with explicit
-+visibility will have no effect.
-+
-+Explicitly instantiated inline methods are unaffected by this option
-+as their linkage might otherwise cross a shared library boundary.
-+@xref{Template Instantiation}.
-+
-+@item -fvisibility-ms-compat
-+@opindex fvisibility-ms-compat
-+This flag attempts to use visibility settings to make GCC's C++
-+linkage model compatible with that of Microsoft Visual Studio.
-+
-+The flag makes these changes to GCC's linkage model:
-+
-+@enumerate
-+@item
-+It sets the default visibility to @code{hidden}, like
-+@option{-fvisibility=hidden}.
-+
-+@item
-+Types, but not their members, are not hidden by default.
-+
-+@item
-+The One Definition Rule is relaxed for types without explicit
-+visibility specifications which are defined in more than one different
-+shared object: those declarations are permitted if they would have
-+been permitted when this option was not used.
-+@end enumerate
-+
-+In new code it is better to use @option{-fvisibility=hidden} and
-+export those classes which are intended to be externally visible.
-+Unfortunately it is possible for code to rely, perhaps accidentally,
-+on the Visual Studio behavior.
-+
-+Among the consequences of these changes are that static data members
-+of the same type with the same name but defined in different shared
-+objects will be different, so changing one will not change the other;
-+and that pointers to function members defined in different shared
-+objects may not compare equal. When this flag is given, it is a
-+violation of the ODR to define types with the same name differently.
-+
-+@item -fno-weak
-+@opindex fno-weak
-+Do not use weak symbol support, even if it is provided by the linker.
-+By default, G++ will use weak symbols if they are available. This
-+option exists only for testing, and should not be used by end-users;
-+it will result in inferior code and has no benefits. This option may
-+be removed in a future release of G++.
-+
-+@item -nostdinc++
-+@opindex nostdinc++
-+Do not search for header files in the standard directories specific to
-+C++, but do still search the other standard directories. (This option
-+is used when building the C++ library.)
-+@end table
-+
-+In addition, these optimization, warning, and code generation options
-+have meanings only for C++ programs:
-+
-+@table @gcctabopt
-+@item -fno-default-inline
-+@opindex fno-default-inline
-+Do not assume @samp{inline} for functions defined inside a class scope.
-+@xref{Optimize Options,,Options That Control Optimization}. Note that these
-+functions will have linkage like inline functions; they just won't be
-+inlined by default.
-+
-+@item -Wabi @r{(C, Objective-C, C++ and Objective-C++ only)}
-+@opindex Wabi
-+@opindex Wno-abi
-+Warn when G++ generates code that is probably not compatible with the
-+vendor-neutral C++ ABI@. Although an effort has been made to warn about
-+all such cases, there are probably some cases that are not warned about,
-+even though G++ is generating incompatible code. There may also be
-+cases where warnings are emitted even though the code that is generated
-+will be compatible.
-+
-+You should rewrite your code to avoid these warnings if you are
-+concerned about the fact that code generated by G++ may not be binary
-+compatible with code generated by other compilers.
-+
-+The known incompatibilities at this point include:
-+
-+@itemize @bullet
-+
-+@item
-+Incorrect handling of tail-padding for bit-fields. G++ may attempt to
-+pack data into the same byte as a base class. For example:
-+
-+@smallexample
-+struct A @{ virtual void f(); int f1 : 1; @};
-+struct B : public A @{ int f2 : 1; @};
-+@end smallexample
-+
-+@noindent
-+In this case, G++ will place @code{B::f2} into the same byte
-+as@code{A::f1}; other compilers will not. You can avoid this problem
-+by explicitly padding @code{A} so that its size is a multiple of the
-+byte size on your platform; that will cause G++ and other compilers to
-+layout @code{B} identically.
-+
-+@item
-+Incorrect handling of tail-padding for virtual bases. G++ does not use
-+tail padding when laying out virtual bases. For example:
-+
-+@smallexample
-+struct A @{ virtual void f(); char c1; @};
-+struct B @{ B(); char c2; @};
-+struct C : public A, public virtual B @{@};
-+@end smallexample
-+
-+@noindent
-+In this case, G++ will not place @code{B} into the tail-padding for
-+@code{A}; other compilers will. You can avoid this problem by
-+explicitly padding @code{A} so that its size is a multiple of its
-+alignment (ignoring virtual base classes); that will cause G++ and other
-+compilers to layout @code{C} identically.
-+
-+@item
-+Incorrect handling of bit-fields with declared widths greater than that
-+of their underlying types, when the bit-fields appear in a union. For
-+example:
-+
-+@smallexample
-+union U @{ int i : 4096; @};
-+@end smallexample
-+
-+@noindent
-+Assuming that an @code{int} does not have 4096 bits, G++ will make the
-+union too small by the number of bits in an @code{int}.
-+
-+@item
-+Empty classes can be placed at incorrect offsets. For example:
-+
-+@smallexample
-+struct A @{@};
-+
-+struct B @{
-+ A a;
-+ virtual void f ();
-+@};
-+
-+struct C : public B, public A @{@};
-+@end smallexample
-+
-+@noindent
-+G++ will place the @code{A} base class of @code{C} at a nonzero offset;
-+it should be placed at offset zero. G++ mistakenly believes that the
-+@code{A} data member of @code{B} is already at offset zero.
-+
-+@item
-+Names of template functions whose types involve @code{typename} or
-+template template parameters can be mangled incorrectly.
-+
-+@smallexample
-+template <typename Q>
-+void f(typename Q::X) @{@}
-+
-+template <template <typename> class Q>
-+void f(typename Q<int>::X) @{@}
-+@end smallexample
-+
-+@noindent
-+Instantiations of these templates may be mangled incorrectly.
-+
-+@end itemize
-+
-+It also warns psABI related changes. The known psABI changes at this
-+point include:
-+
-+@itemize @bullet
-+
-+@item
-+For SYSV/x86-64, when passing union with long double, it is changed to
-+pass in memory as specified in psABI. For example:
-+
-+@smallexample
-+union U @{
-+ long double ld;
-+ int i;
-+@};
-+@end smallexample
-+
-+@noindent
-+@code{union U} will always be passed in memory.
-+
-+@end itemize
-+
-+@item -Wctor-dtor-privacy @r{(C++ and Objective-C++ only)}
-+@opindex Wctor-dtor-privacy
-+@opindex Wno-ctor-dtor-privacy
-+Warn when a class seems unusable because all the constructors or
-+destructors in that class are private, and it has neither friends nor
-+public static member functions.
-+
-+@item -Wnon-virtual-dtor @r{(C++ and Objective-C++ only)}
-+@opindex Wnon-virtual-dtor
-+@opindex Wno-non-virtual-dtor
-+Warn when a class has virtual functions and accessible non-virtual
-+destructor, in which case it would be possible but unsafe to delete
-+an instance of a derived class through a pointer to the base class.
-+This warning is also enabled if -Weffc++ is specified.
-+
-+@item -Wreorder @r{(C++ and Objective-C++ only)}
-+@opindex Wreorder
-+@opindex Wno-reorder
-+@cindex reordering, warning
-+@cindex warning for reordering of member initializers
-+Warn when the order of member initializers given in the code does not
-+match the order in which they must be executed. For instance:
-+
-+@smallexample
-+struct A @{
-+ int i;
-+ int j;
-+ A(): j (0), i (1) @{ @}
-+@};
-+@end smallexample
-+
-+The compiler will rearrange the member initializers for @samp{i}
-+and @samp{j} to match the declaration order of the members, emitting
-+a warning to that effect. This warning is enabled by @option{-Wall}.
-+@end table
-+
-+The following @option{-W@dots{}} options are not affected by @option{-Wall}.
-+
-+@table @gcctabopt
-+@item -Weffc++ @r{(C++ and Objective-C++ only)}
-+@opindex Weffc++
-+@opindex Wno-effc++
-+Warn about violations of the following style guidelines from Scott Meyers'
-+@cite{Effective C++} book:
-+
-+@itemize @bullet
-+@item
-+Item 11: Define a copy constructor and an assignment operator for classes
-+with dynamically allocated memory.
-+
-+@item
-+Item 12: Prefer initialization to assignment in constructors.
-+
-+@item
-+Item 14: Make destructors virtual in base classes.
-+
-+@item
-+Item 15: Have @code{operator=} return a reference to @code{*this}.
-+
-+@item
-+Item 23: Don't try to return a reference when you must return an object.
-+
-+@end itemize
-+
-+Also warn about violations of the following style guidelines from
-+Scott Meyers' @cite{More Effective C++} book:
-+
-+@itemize @bullet
-+@item
-+Item 6: Distinguish between prefix and postfix forms of increment and
-+decrement operators.
-+
-+@item
-+Item 7: Never overload @code{&&}, @code{||}, or @code{,}.
-+
-+@end itemize
-+
-+When selecting this option, be aware that the standard library
-+headers do not obey all of these guidelines; use @samp{grep -v}
-+to filter out those warnings.
-+
-+@item -Wstrict-null-sentinel @r{(C++ and Objective-C++ only)}
-+@opindex Wstrict-null-sentinel
-+@opindex Wno-strict-null-sentinel
-+Warn also about the use of an uncasted @code{NULL} as sentinel. When
-+compiling only with GCC this is a valid sentinel, as @code{NULL} is defined
-+to @code{__null}. Although it is a null pointer constant not a null pointer,
-+it is guaranteed to be of the same size as a pointer. But this use is
-+not portable across different compilers.
-+
-+@item -Wno-non-template-friend @r{(C++ and Objective-C++ only)}
-+@opindex Wno-non-template-friend
-+@opindex Wnon-template-friend
-+Disable warnings when non-templatized friend functions are declared
-+within a template. Since the advent of explicit template specification
-+support in G++, if the name of the friend is an unqualified-id (i.e.,
-+@samp{friend foo(int)}), the C++ language specification demands that the
-+friend declare or define an ordinary, nontemplate function. (Section
-+14.5.3). Before G++ implemented explicit specification, unqualified-ids
-+could be interpreted as a particular specialization of a templatized
-+function. Because this non-conforming behavior is no longer the default
-+behavior for G++, @option{-Wnon-template-friend} allows the compiler to
-+check existing code for potential trouble spots and is on by default.
-+This new compiler behavior can be turned off with
-+@option{-Wno-non-template-friend} which keeps the conformant compiler code
-+but disables the helpful warning.
-+
-+@item -Wold-style-cast @r{(C++ and Objective-C++ only)}
-+@opindex Wold-style-cast
-+@opindex Wno-old-style-cast
-+Warn if an old-style (C-style) cast to a non-void type is used within
-+a C++ program. The new-style casts (@samp{dynamic_cast},
-+@samp{static_cast}, @samp{reinterpret_cast}, and @samp{const_cast}) are
-+less vulnerable to unintended effects and much easier to search for.
-+
-+@item -Woverloaded-virtual @r{(C++ and Objective-C++ only)}
-+@opindex Woverloaded-virtual
-+@opindex Wno-overloaded-virtual
-+@cindex overloaded virtual fn, warning
-+@cindex warning for overloaded virtual fn
-+Warn when a function declaration hides virtual functions from a
-+base class. For example, in:
-+
-+@smallexample
-+struct A @{
-+ virtual void f();
-+@};
-+
-+struct B: public A @{
-+ void f(int);
-+@};
-+@end smallexample
-+
-+the @code{A} class version of @code{f} is hidden in @code{B}, and code
-+like:
-+
-+@smallexample
-+B* b;
-+b->f();
-+@end smallexample
-+
-+will fail to compile.
-+
-+@item -Wno-pmf-conversions @r{(C++ and Objective-C++ only)}
-+@opindex Wno-pmf-conversions
-+@opindex Wpmf-conversions
-+Disable the diagnostic for converting a bound pointer to member function
-+to a plain pointer.
-+
-+@item -Wsign-promo @r{(C++ and Objective-C++ only)}
-+@opindex Wsign-promo
-+@opindex Wno-sign-promo
-+Warn when overload resolution chooses a promotion from unsigned or
-+enumerated type to a signed type, over a conversion to an unsigned type of
-+the same size. Previous versions of G++ would try to preserve
-+unsignedness, but the standard mandates the current behavior.
-+
-+@smallexample
-+struct A @{
-+ operator int ();
-+ A& operator = (int);
-+@};
-+
-+main ()
-+@{
-+ A a,b;
-+ a = b;
-+@}
-+@end smallexample
-+
-+In this example, G++ will synthesize a default @samp{A& operator =
-+(const A&);}, while cfront will use the user-defined @samp{operator =}.
-+@end table
-+
-+@node Objective-C and Objective-C++ Dialect Options
-+@section Options Controlling Objective-C and Objective-C++ Dialects
-+
-+@cindex compiler options, Objective-C and Objective-C++
-+@cindex Objective-C and Objective-C++ options, command line
-+@cindex options, Objective-C and Objective-C++
-+(NOTE: This manual does not describe the Objective-C and Objective-C++
-+languages themselves. See @xref{Standards,,Language Standards
-+Supported by GCC}, for references.)
-+
-+This section describes the command-line options that are only meaningful
-+for Objective-C and Objective-C++ programs, but you can also use most of
-+the language-independent GNU compiler options.
-+For example, you might compile a file @code{some_class.m} like this:
-+
-+@smallexample
-+gcc -g -fgnu-runtime -O -c some_class.m
-+@end smallexample
-+
-+@noindent
-+In this example, @option{-fgnu-runtime} is an option meant only for
-+Objective-C and Objective-C++ programs; you can use the other options with
-+any language supported by GCC@.
-+
-+Note that since Objective-C is an extension of the C language, Objective-C
-+compilations may also use options specific to the C front-end (e.g.,
-+@option{-Wtraditional}). Similarly, Objective-C++ compilations may use
-+C++-specific options (e.g., @option{-Wabi}).
-+
-+Here is a list of options that are @emph{only} for compiling Objective-C
-+and Objective-C++ programs:
-+
-+@table @gcctabopt
-+@item -fconstant-string-class=@var{class-name}
-+@opindex fconstant-string-class
-+Use @var{class-name} as the name of the class to instantiate for each
-+literal string specified with the syntax @code{@@"@dots{}"}. The default
-+class name is @code{NXConstantString} if the GNU runtime is being used, and
-+@code{NSConstantString} if the NeXT runtime is being used (see below). The
-+@option{-fconstant-cfstrings} option, if also present, will override the
-+@option{-fconstant-string-class} setting and cause @code{@@"@dots{}"} literals
-+to be laid out as constant CoreFoundation strings.
-+
-+@item -fgnu-runtime
-+@opindex fgnu-runtime
-+Generate object code compatible with the standard GNU Objective-C
-+runtime. This is the default for most types of systems.
-+
-+@item -fnext-runtime
-+@opindex fnext-runtime
-+Generate output compatible with the NeXT runtime. This is the default
-+for NeXT-based systems, including Darwin and Mac OS X@. The macro
-+@code{__NEXT_RUNTIME__} is predefined if (and only if) this option is
-+used.
-+
-+@item -fno-nil-receivers
-+@opindex fno-nil-receivers
-+Assume that all Objective-C message dispatches (e.g.,
-+@code{[receiver message:arg]}) in this translation unit ensure that the receiver
-+is not @code{nil}. This allows for more efficient entry points in the runtime
-+to be used. Currently, this option is only available in conjunction with
-+the NeXT runtime on Mac OS X 10.3 and later.
-+
-+@item -fobjc-call-cxx-cdtors
-+@opindex fobjc-call-cxx-cdtors
-+For each Objective-C class, check if any of its instance variables is a
-+C++ object with a non-trivial default constructor. If so, synthesize a
-+special @code{- (id) .cxx_construct} instance method that will run
-+non-trivial default constructors on any such instance variables, in order,
-+and then return @code{self}. Similarly, check if any instance variable
-+is a C++ object with a non-trivial destructor, and if so, synthesize a
-+special @code{- (void) .cxx_destruct} method that will run
-+all such default destructors, in reverse order.
-+
-+The @code{- (id) .cxx_construct} and/or @code{- (void) .cxx_destruct} methods
-+thusly generated will only operate on instance variables declared in the
-+current Objective-C class, and not those inherited from superclasses. It
-+is the responsibility of the Objective-C runtime to invoke all such methods
-+in an object's inheritance hierarchy. The @code{- (id) .cxx_construct} methods
-+will be invoked by the runtime immediately after a new object
-+instance is allocated; the @code{- (void) .cxx_destruct} methods will
-+be invoked immediately before the runtime deallocates an object instance.
-+
-+As of this writing, only the NeXT runtime on Mac OS X 10.4 and later has
-+support for invoking the @code{- (id) .cxx_construct} and
-+@code{- (void) .cxx_destruct} methods.
-+
-+@item -fobjc-direct-dispatch
-+@opindex fobjc-direct-dispatch
-+Allow fast jumps to the message dispatcher. On Darwin this is
-+accomplished via the comm page.
-+
-+@item -fobjc-exceptions
-+@opindex fobjc-exceptions
-+Enable syntactic support for structured exception handling in Objective-C,
-+similar to what is offered by C++ and Java. This option is
-+unavailable in conjunction with the NeXT runtime on Mac OS X 10.2 and
-+earlier.
-+
-+@smallexample
-+ @@try @{
-+ @dots{}
-+ @@throw expr;
-+ @dots{}
-+ @}
-+ @@catch (AnObjCClass *exc) @{
-+ @dots{}
-+ @@throw expr;
-+ @dots{}
-+ @@throw;
-+ @dots{}
-+ @}
-+ @@catch (AnotherClass *exc) @{
-+ @dots{}
-+ @}
-+ @@catch (id allOthers) @{
-+ @dots{}
-+ @}
-+ @@finally @{
-+ @dots{}
-+ @@throw expr;
-+ @dots{}
-+ @}
-+@end smallexample
-+
-+The @code{@@throw} statement may appear anywhere in an Objective-C or
-+Objective-C++ program; when used inside of a @code{@@catch} block, the
-+@code{@@throw} may appear without an argument (as shown above), in which case
-+the object caught by the @code{@@catch} will be rethrown.
-+
-+Note that only (pointers to) Objective-C objects may be thrown and
-+caught using this scheme. When an object is thrown, it will be caught
-+by the nearest @code{@@catch} clause capable of handling objects of that type,
-+analogously to how @code{catch} blocks work in C++ and Java. A
-+@code{@@catch(id @dots{})} clause (as shown above) may also be provided to catch
-+any and all Objective-C exceptions not caught by previous @code{@@catch}
-+clauses (if any).
-+
-+The @code{@@finally} clause, if present, will be executed upon exit from the
-+immediately preceding @code{@@try @dots{} @@catch} section. This will happen
-+regardless of whether any exceptions are thrown, caught or rethrown
-+inside the @code{@@try @dots{} @@catch} section, analogously to the behavior
-+of the @code{finally} clause in Java.
-+
-+There are several caveats to using the new exception mechanism:
-+
-+@itemize @bullet
-+@item
-+Although currently designed to be binary compatible with @code{NS_HANDLER}-style
-+idioms provided by the @code{NSException} class, the new
-+exceptions can only be used on Mac OS X 10.3 (Panther) and later
-+systems, due to additional functionality needed in the (NeXT) Objective-C
-+runtime.
-+
-+@item
-+As mentioned above, the new exceptions do not support handling
-+types other than Objective-C objects. Furthermore, when used from
-+Objective-C++, the Objective-C exception model does not interoperate with C++
-+exceptions at this time. This means you cannot @code{@@throw} an exception
-+from Objective-C and @code{catch} it in C++, or vice versa
-+(i.e., @code{throw @dots{} @@catch}).
-+@end itemize
-+
-+The @option{-fobjc-exceptions} switch also enables the use of synchronization
-+blocks for thread-safe execution:
-+
-+@smallexample
-+ @@synchronized (ObjCClass *guard) @{
-+ @dots{}
-+ @}
-+@end smallexample
-+
-+Upon entering the @code{@@synchronized} block, a thread of execution shall
-+first check whether a lock has been placed on the corresponding @code{guard}
-+object by another thread. If it has, the current thread shall wait until
-+the other thread relinquishes its lock. Once @code{guard} becomes available,
-+the current thread will place its own lock on it, execute the code contained in
-+the @code{@@synchronized} block, and finally relinquish the lock (thereby
-+making @code{guard} available to other threads).
-+
-+Unlike Java, Objective-C does not allow for entire methods to be marked
-+@code{@@synchronized}. Note that throwing exceptions out of
-+@code{@@synchronized} blocks is allowed, and will cause the guarding object
-+to be unlocked properly.
-+
-+@item -fobjc-gc
-+@opindex fobjc-gc
-+Enable garbage collection (GC) in Objective-C and Objective-C++ programs.
-+
-+@item -freplace-objc-classes
-+@opindex freplace-objc-classes
-+Emit a special marker instructing @command{ld(1)} not to statically link in
-+the resulting object file, and allow @command{dyld(1)} to load it in at
-+run time instead. This is used in conjunction with the Fix-and-Continue
-+debugging mode, where the object file in question may be recompiled and
-+dynamically reloaded in the course of program execution, without the need
-+to restart the program itself. Currently, Fix-and-Continue functionality
-+is only available in conjunction with the NeXT runtime on Mac OS X 10.3
-+and later.
-+
-+@item -fzero-link
-+@opindex fzero-link
-+When compiling for the NeXT runtime, the compiler ordinarily replaces calls
-+to @code{objc_getClass("@dots{}")} (when the name of the class is known at
-+compile time) with static class references that get initialized at load time,
-+which improves run-time performance. Specifying the @option{-fzero-link} flag
-+suppresses this behavior and causes calls to @code{objc_getClass("@dots{}")}
-+to be retained. This is useful in Zero-Link debugging mode, since it allows
-+for individual class implementations to be modified during program execution.
-+
-+@item -gen-decls
-+@opindex gen-decls
-+Dump interface declarations for all classes seen in the source file to a
-+file named @file{@var{sourcename}.decl}.
-+
-+@item -Wassign-intercept @r{(Objective-C and Objective-C++ only)}
-+@opindex Wassign-intercept
-+@opindex Wno-assign-intercept
-+Warn whenever an Objective-C assignment is being intercepted by the
-+garbage collector.
-+
-+@item -Wno-protocol @r{(Objective-C and Objective-C++ only)}
-+@opindex Wno-protocol
-+@opindex Wprotocol
-+If a class is declared to implement a protocol, a warning is issued for
-+every method in the protocol that is not implemented by the class. The
-+default behavior is to issue a warning for every method not explicitly
-+implemented in the class, even if a method implementation is inherited
-+from the superclass. If you use the @option{-Wno-protocol} option, then
-+methods inherited from the superclass are considered to be implemented,
-+and no warning is issued for them.
-+
-+@item -Wselector @r{(Objective-C and Objective-C++ only)}
-+@opindex Wselector
-+@opindex Wno-selector
-+Warn if multiple methods of different types for the same selector are
-+found during compilation. The check is performed on the list of methods
-+in the final stage of compilation. Additionally, a check is performed
-+for each selector appearing in a @code{@@selector(@dots{})}
-+expression, and a corresponding method for that selector has been found
-+during compilation. Because these checks scan the method table only at
-+the end of compilation, these warnings are not produced if the final
-+stage of compilation is not reached, for example because an error is
-+found during compilation, or because the @option{-fsyntax-only} option is
-+being used.
-+
-+@item -Wstrict-selector-match @r{(Objective-C and Objective-C++ only)}
-+@opindex Wstrict-selector-match
-+@opindex Wno-strict-selector-match
-+Warn if multiple methods with differing argument and/or return types are
-+found for a given selector when attempting to send a message using this
-+selector to a receiver of type @code{id} or @code{Class}. When this flag
-+is off (which is the default behavior), the compiler will omit such warnings
-+if any differences found are confined to types which share the same size
-+and alignment.
-+
-+@item -Wundeclared-selector @r{(Objective-C and Objective-C++ only)}
-+@opindex Wundeclared-selector
-+@opindex Wno-undeclared-selector
-+Warn if a @code{@@selector(@dots{})} expression referring to an
-+undeclared selector is found. A selector is considered undeclared if no
-+method with that name has been declared before the
-+@code{@@selector(@dots{})} expression, either explicitly in an
-+@code{@@interface} or @code{@@protocol} declaration, or implicitly in
-+an @code{@@implementation} section. This option always performs its
-+checks as soon as a @code{@@selector(@dots{})} expression is found,
-+while @option{-Wselector} only performs its checks in the final stage of
-+compilation. This also enforces the coding style convention
-+that methods and selectors must be declared before being used.
-+
-+@item -print-objc-runtime-info
-+@opindex print-objc-runtime-info
-+Generate C header describing the largest structure that is passed by
-+value, if any.
-+
-+@end table
-+
-+@node Language Independent Options
-+@section Options to Control Diagnostic Messages Formatting
-+@cindex options to control diagnostics formatting
-+@cindex diagnostic messages
-+@cindex message formatting
-+
-+Traditionally, diagnostic messages have been formatted irrespective of
-+the output device's aspect (e.g.@: its width, @dots{}). The options described
-+below can be used to control the diagnostic messages formatting
-+algorithm, e.g.@: how many characters per line, how often source location
-+information should be reported. Right now, only the C++ front end can
-+honor these options. However it is expected, in the near future, that
-+the remaining front ends would be able to digest them correctly.
-+
-+@table @gcctabopt
-+@item -fmessage-length=@var{n}
-+@opindex fmessage-length
-+Try to format error messages so that they fit on lines of about @var{n}
-+characters. The default is 72 characters for @command{g++} and 0 for the rest of
-+the front ends supported by GCC@. If @var{n} is zero, then no
-+line-wrapping will be done; each error message will appear on a single
-+line.
-+
-+@opindex fdiagnostics-show-location
-+@item -fdiagnostics-show-location=once
-+Only meaningful in line-wrapping mode. Instructs the diagnostic messages
-+reporter to emit @emph{once} source location information; that is, in
-+case the message is too long to fit on a single physical line and has to
-+be wrapped, the source location won't be emitted (as prefix) again,
-+over and over, in subsequent continuation lines. This is the default
-+behavior.
-+
-+@item -fdiagnostics-show-location=every-line
-+Only meaningful in line-wrapping mode. Instructs the diagnostic
-+messages reporter to emit the same source location information (as
-+prefix) for physical lines that result from the process of breaking
-+a message which is too long to fit on a single line.
-+
-+@item -fdiagnostics-show-option
-+@opindex fdiagnostics-show-option
-+This option instructs the diagnostic machinery to add text to each
-+diagnostic emitted, which indicates which command line option directly
-+controls that diagnostic, when such an option is known to the
-+diagnostic machinery.
-+
-+@item -Wcoverage-mismatch
-+@opindex Wcoverage-mismatch
-+Warn if feedback profiles do not match when using the
-+@option{-fprofile-use} option.
-+If a source file was changed between @option{-fprofile-gen} and
-+@option{-fprofile-use}, the files with the profile feedback can fail
-+to match the source file and GCC can not use the profile feedback
-+information. By default, GCC emits an error message in this case.
-+The option @option{-Wcoverage-mismatch} emits a warning instead of an
-+error. GCC does not use appropriate feedback profiles, so using this
-+option can result in poorly optimized code. This option is useful
-+only in the case of very minor changes such as bug fixes to an
-+existing code-base.
-+
-+@end table
-+
-+@node Warning Options
-+@section Options to Request or Suppress Warnings
-+@cindex options to control warnings
-+@cindex warning messages
-+@cindex messages, warning
-+@cindex suppressing warnings
-+
-+Warnings are diagnostic messages that report constructions which
-+are not inherently erroneous but which are risky or suggest there
-+may have been an error.
-+
-+The following language-independent options do not enable specific
-+warnings but control the kinds of diagnostics produced by GCC.
-+
-+@table @gcctabopt
-+@cindex syntax checking
-+@item -fsyntax-only
-+@opindex fsyntax-only
-+Check the code for syntax errors, but don't do anything beyond that.
-+
-+@item -w
-+@opindex w
-+Inhibit all warning messages.
-+
-+@item -Werror
-+@opindex Werror
-+@opindex Wno-error
-+Make all warnings into errors.
-+
-+@item -Werror=
-+@opindex Werror=
-+@opindex Wno-error=
-+Make the specified warning into an error. The specifier for a warning
-+is appended, for example @option{-Werror=switch} turns the warnings
-+controlled by @option{-Wswitch} into errors. This switch takes a
-+negative form, to be used to negate @option{-Werror} for specific
-+warnings, for example @option{-Wno-error=switch} makes
-+@option{-Wswitch} warnings not be errors, even when @option{-Werror}
-+is in effect. You can use the @option{-fdiagnostics-show-option}
-+option to have each controllable warning amended with the option which
-+controls it, to determine what to use with this option.
-+
-+Note that specifying @option{-Werror=}@var{foo} automatically implies
-+@option{-W}@var{foo}. However, @option{-Wno-error=}@var{foo} does not
-+imply anything.
-+
-+@item -Wfatal-errors
-+@opindex Wfatal-errors
-+@opindex Wno-fatal-errors
-+This option causes the compiler to abort compilation on the first error
-+occurred rather than trying to keep going and printing further error
-+messages.
-+
-+@end table
-+
-+You can request many specific warnings with options beginning
-+@samp{-W}, for example @option{-Wimplicit} to request warnings on
-+implicit declarations. Each of these specific warning options also
-+has a negative form beginning @samp{-Wno-} to turn off warnings; for
-+example, @option{-Wno-implicit}. This manual lists only one of the
-+two forms, whichever is not the default. For further,
-+language-specific options also refer to @ref{C++ Dialect Options} and
-+@ref{Objective-C and Objective-C++ Dialect Options}.
-+
-+@table @gcctabopt
-+@item -pedantic
-+@opindex pedantic
-+Issue all the warnings demanded by strict ISO C and ISO C++;
-+reject all programs that use forbidden extensions, and some other
-+programs that do not follow ISO C and ISO C++. For ISO C, follows the
-+version of the ISO C standard specified by any @option{-std} option used.
-+
-+Valid ISO C and ISO C++ programs should compile properly with or without
-+this option (though a rare few will require @option{-ansi} or a
-+@option{-std} option specifying the required version of ISO C)@. However,
-+without this option, certain GNU extensions and traditional C and C++
-+features are supported as well. With this option, they are rejected.
-+
-+@option{-pedantic} does not cause warning messages for use of the
-+alternate keywords whose names begin and end with @samp{__}. Pedantic
-+warnings are also disabled in the expression that follows
-+@code{__extension__}. However, only system header files should use
-+these escape routes; application programs should avoid them.
-+@xref{Alternate Keywords}.
-+
-+Some users try to use @option{-pedantic} to check programs for strict ISO
-+C conformance. They soon find that it does not do quite what they want:
-+it finds some non-ISO practices, but not all---only those for which
-+ISO C @emph{requires} a diagnostic, and some others for which
-+diagnostics have been added.
-+
-+A feature to report any failure to conform to ISO C might be useful in
-+some instances, but would require considerable additional work and would
-+be quite different from @option{-pedantic}. We don't have plans to
-+support such a feature in the near future.
-+
-+Where the standard specified with @option{-std} represents a GNU
-+extended dialect of C, such as @samp{gnu89} or @samp{gnu99}, there is a
-+corresponding @dfn{base standard}, the version of ISO C on which the GNU
-+extended dialect is based. Warnings from @option{-pedantic} are given
-+where they are required by the base standard. (It would not make sense
-+for such warnings to be given only for features not in the specified GNU
-+C dialect, since by definition the GNU dialects of C include all
-+features the compiler supports with the given option, and there would be
-+nothing to warn about.)
-+
-+@item -pedantic-errors
-+@opindex pedantic-errors
-+Like @option{-pedantic}, except that errors are produced rather than
-+warnings.
-+
-+@item -Wall
-+@opindex Wall
-+@opindex Wno-all
-+This enables all the warnings about constructions that some users
-+consider questionable, and that are easy to avoid (or modify to
-+prevent the warning), even in conjunction with macros. This also
-+enables some language-specific warnings described in @ref{C++ Dialect
-+Options} and @ref{Objective-C and Objective-C++ Dialect Options}.
-+
-+@option{-Wall} turns on the following warning flags:
-+
-+@gccoptlist{-Waddress @gol
-+-Warray-bounds @r{(only with} @option{-O2}@r{)} @gol
-+-Wc++0x-compat @gol
-+-Wchar-subscripts @gol
-+-Wimplicit-int @gol
-+-Wimplicit-function-declaration @gol
-+-Wcomment @gol
-+-Wformat @gol
-+-Wmain @r{(only for C/ObjC and unless} @option{-ffreestanding}@r{)} @gol
-+-Wmissing-braces @gol
-+-Wnonnull @gol
-+-Wparentheses @gol
-+-Wpointer-sign @gol
-+-Wreorder @gol
-+-Wreturn-type @gol
-+-Wsequence-point @gol
-+-Wsign-compare @r{(only in C++)} @gol
-+-Wstrict-aliasing @gol
-+-Wstrict-overflow=1 @gol
-+-Wswitch @gol
-+-Wtrigraphs @gol
-+-Wuninitialized @gol
-+-Wunknown-pragmas @gol
-+-Wunused-function @gol
-+-Wunused-label @gol
-+-Wunused-value @gol
-+-Wunused-variable @gol
-+-Wvolatile-register-var @gol
-+}
-+
-+Note that some warning flags are not implied by @option{-Wall}. Some of
-+them warn about constructions that users generally do not consider
-+questionable, but which occasionally you might wish to check for;
-+others warn about constructions that are necessary or hard to avoid in
-+some cases, and there is no simple way to modify the code to suppress
-+the warning. Some of them are enabled by @option{-Wextra} but many of
-+them must be enabled individually.
-+
-+@item -Wextra
-+@opindex W
-+@opindex Wextra
-+@opindex Wno-extra
-+This enables some extra warning flags that are not enabled by
-+@option{-Wall}. (This option used to be called @option{-W}. The older
-+name is still supported, but the newer name is more descriptive.)
-+
-+@gccoptlist{-Wclobbered @gol
-+-Wempty-body @gol
-+-Wignored-qualifiers @gol
-+-Wmissing-field-initializers @gol
-+-Wmissing-parameter-type @r{(C only)} @gol
-+-Wold-style-declaration @r{(C only)} @gol
-+-Woverride-init @gol
-+-Wsign-compare @gol
-+-Wtype-limits @gol
-+-Wuninitialized @gol
-+-Wunused-parameter @r{(only with} @option{-Wunused} @r{or} @option{-Wall}@r{)} @gol
-+}
-+
-+The option @option{-Wextra} also prints warning messages for the
-+following cases:
-+
-+@itemize @bullet
-+
-+@item
-+A pointer is compared against integer zero with @samp{<}, @samp{<=},
-+@samp{>}, or @samp{>=}.
-+
-+@item
-+(C++ only) An enumerator and a non-enumerator both appear in a
-+conditional expression.
-+
-+@item
-+(C++ only) Ambiguous virtual bases.
-+
-+@item
-+(C++ only) Subscripting an array which has been declared @samp{register}.
-+
-+@item
-+(C++ only) Taking the address of a variable which has been declared
-+@samp{register}.
-+
-+@item
-+(C++ only) A base class is not initialized in a derived class' copy
-+constructor.
-+
-+@end itemize
-+
-+@item -Wchar-subscripts
-+@opindex Wchar-subscripts
-+@opindex Wno-char-subscripts
-+Warn if an array subscript has type @code{char}. This is a common cause
-+of error, as programmers often forget that this type is signed on some
-+machines.
-+This warning is enabled by @option{-Wall}.
-+
-+@item -Wcomment
-+@opindex Wcomment
-+@opindex Wno-comment
-+Warn whenever a comment-start sequence @samp{/*} appears in a @samp{/*}
-+comment, or whenever a Backslash-Newline appears in a @samp{//} comment.
-+This warning is enabled by @option{-Wall}.
-+
-+@item -Wformat
-+@opindex Wformat
-+@opindex Wno-format
-+@opindex ffreestanding
-+@opindex fno-builtin
-+Check calls to @code{printf} and @code{scanf}, etc., to make sure that
-+the arguments supplied have types appropriate to the format string
-+specified, and that the conversions specified in the format string make
-+sense. This includes standard functions, and others specified by format
-+attributes (@pxref{Function Attributes}), in the @code{printf},
-+@code{scanf}, @code{strftime} and @code{strfmon} (an X/Open extension,
-+not in the C standard) families (or other target-specific families).
-+Which functions are checked without format attributes having been
-+specified depends on the standard version selected, and such checks of
-+functions without the attribute specified are disabled by
-+@option{-ffreestanding} or @option{-fno-builtin}.
-+
-+The formats are checked against the format features supported by GNU
-+libc version 2.2. These include all ISO C90 and C99 features, as well
-+as features from the Single Unix Specification and some BSD and GNU
-+extensions. Other library implementations may not support all these
-+features; GCC does not support warning about features that go beyond a
-+particular library's limitations. However, if @option{-pedantic} is used
-+with @option{-Wformat}, warnings will be given about format features not
-+in the selected standard version (but not for @code{strfmon} formats,
-+since those are not in any version of the C standard). @xref{C Dialect
-+Options,,Options Controlling C Dialect}.
-+
-+Since @option{-Wformat} also checks for null format arguments for
-+several functions, @option{-Wformat} also implies @option{-Wnonnull}.
-+
-+@option{-Wformat} is included in @option{-Wall}. For more control over some
-+aspects of format checking, the options @option{-Wformat-y2k},
-+@option{-Wno-format-extra-args}, @option{-Wno-format-zero-length},
-+@option{-Wformat-nonliteral}, @option{-Wformat-security}, and
-+@option{-Wformat=2} are available, but are not included in @option{-Wall}.
-+
-+@item -Wformat-y2k
-+@opindex Wformat-y2k
-+@opindex Wno-format-y2k
-+If @option{-Wformat} is specified, also warn about @code{strftime}
-+formats which may yield only a two-digit year.
-+
-+@item -Wno-format-contains-nul
-+@opindex Wno-format-contains-nul
-+@opindex Wformat-contains-nul
-+If @option{-Wformat} is specified, do not warn about format strings that
-+contain NUL bytes.
-+
-+@item -Wno-format-extra-args
-+@opindex Wno-format-extra-args
-+@opindex Wformat-extra-args
-+If @option{-Wformat} is specified, do not warn about excess arguments to a
-+@code{printf} or @code{scanf} format function. The C standard specifies
-+that such arguments are ignored.
-+
-+Where the unused arguments lie between used arguments that are
-+specified with @samp{$} operand number specifications, normally
-+warnings are still given, since the implementation could not know what
-+type to pass to @code{va_arg} to skip the unused arguments. However,
-+in the case of @code{scanf} formats, this option will suppress the
-+warning if the unused arguments are all pointers, since the Single
-+Unix Specification says that such unused arguments are allowed.
-+
-+@item -Wno-format-zero-length @r{(C and Objective-C only)}
-+@opindex Wno-format-zero-length
-+@opindex Wformat-zero-length
-+If @option{-Wformat} is specified, do not warn about zero-length formats.
-+The C standard specifies that zero-length formats are allowed.
-+
-+@item -Wformat-nonliteral
-+@opindex Wformat-nonliteral
-+@opindex Wno-format-nonliteral
-+If @option{-Wformat} is specified, also warn if the format string is not a
-+string literal and so cannot be checked, unless the format function
-+takes its format arguments as a @code{va_list}.
-+
-+@item -Wformat-security
-+@opindex Wformat-security
-+@opindex Wno-format-security
-+If @option{-Wformat} is specified, also warn about uses of format
-+functions that represent possible security problems. At present, this
-+warns about calls to @code{printf} and @code{scanf} functions where the
-+format string is not a string literal and there are no format arguments,
-+as in @code{printf (foo);}. This may be a security hole if the format
-+string came from untrusted input and contains @samp{%n}. (This is
-+currently a subset of what @option{-Wformat-nonliteral} warns about, but
-+in future warnings may be added to @option{-Wformat-security} that are not
-+included in @option{-Wformat-nonliteral}.)
-+
-+@item -Wformat=2
-+@opindex Wformat=2
-+@opindex Wno-format=2
-+Enable @option{-Wformat} plus format checks not included in
-+@option{-Wformat}. Currently equivalent to @samp{-Wformat
-+-Wformat-nonliteral -Wformat-security -Wformat-y2k}.
-+
-+@item -Wnonnull @r{(C and Objective-C only)}
-+@opindex Wnonnull
-+@opindex Wno-nonnull
-+Warn about passing a null pointer for arguments marked as
-+requiring a non-null value by the @code{nonnull} function attribute.
-+
-+@option{-Wnonnull} is included in @option{-Wall} and @option{-Wformat}. It
-+can be disabled with the @option{-Wno-nonnull} option.
-+
-+@item -Winit-self @r{(C, C++, Objective-C and Objective-C++ only)}
-+@opindex Winit-self
-+@opindex Wno-init-self
-+Warn about uninitialized variables which are initialized with themselves.
-+Note this option can only be used with the @option{-Wuninitialized} option.
-+
-+For example, GCC will warn about @code{i} being uninitialized in the
-+following snippet only when @option{-Winit-self} has been specified:
-+@smallexample
-+@group
-+int f()
-+@{
-+ int i = i;
-+ return i;
-+@}
-+@end group
-+@end smallexample
-+
-+@item -Wimplicit-int @r{(C and Objective-C only)}
-+@opindex Wimplicit-int
-+@opindex Wno-implicit-int
-+Warn when a declaration does not specify a type.
-+This warning is enabled by @option{-Wall}.
-+
-+@item -Wimplicit-function-declaration @r{(C and Objective-C only)}
-+@opindex Wimplicit-function-declaration
-+@opindex Wno-implicit-function-declaration
-+Give a warning whenever a function is used before being declared. In
-+C99 mode (@option{-std=c99} or @option{-std=gnu99}), this warning is
-+enabled by default and it is made into an error by
-+@option{-pedantic-errors}. This warning is also enabled by
-+@option{-Wall}.
-+
-+@item -Wimplicit
-+@opindex Wimplicit
-+@opindex Wno-implicit
-+Same as @option{-Wimplicit-int} and @option{-Wimplicit-function-declaration}.
-+This warning is enabled by @option{-Wall}.
-+
-+@item -Wignored-qualifiers @r{(C and C++ only)}
-+@opindex Wignored-qualifiers
-+@opindex Wno-ignored-qualifiers
-+Warn if the return type of a function has a type qualifier
-+such as @code{const}. For ISO C such a type qualifier has no effect,
-+since the value returned by a function is not an lvalue.
-+For C++, the warning is only emitted for scalar types or @code{void}.
-+ISO C prohibits qualified @code{void} return types on function
-+definitions, so such return types always receive a warning
-+even without this option.
-+
-+This warning is also enabled by @option{-Wextra}.
-+
-+@item -Wmain
-+@opindex Wmain
-+@opindex Wno-main
-+Warn if the type of @samp{main} is suspicious. @samp{main} should be
-+a function with external linkage, returning int, taking either zero
-+arguments, two, or three arguments of appropriate types. This warning
-+is enabled by default in C++ and is enabled by either @option{-Wall}
-+or @option{-pedantic}.
-+
-+@item -Wmissing-braces
-+@opindex Wmissing-braces
-+@opindex Wno-missing-braces
-+Warn if an aggregate or union initializer is not fully bracketed. In
-+the following example, the initializer for @samp{a} is not fully
-+bracketed, but that for @samp{b} is fully bracketed.
-+
-+@smallexample
-+int a[2][2] = @{ 0, 1, 2, 3 @};
-+int b[2][2] = @{ @{ 0, 1 @}, @{ 2, 3 @} @};
-+@end smallexample
-+
-+This warning is enabled by @option{-Wall}.
-+
-+@item -Wmissing-include-dirs @r{(C, C++, Objective-C and Objective-C++ only)}
-+@opindex Wmissing-include-dirs
-+@opindex Wno-missing-include-dirs
-+Warn if a user-supplied include directory does not exist.
-+
-+@item -Wparentheses
-+@opindex Wparentheses
-+@opindex Wno-parentheses
-+Warn if parentheses are omitted in certain contexts, such
-+as when there is an assignment in a context where a truth value
-+is expected, or when operators are nested whose precedence people
-+often get confused about.
-+
-+Also warn if a comparison like @samp{x<=y<=z} appears; this is
-+equivalent to @samp{(x<=y ? 1 : 0) <= z}, which is a different
-+interpretation from that of ordinary mathematical notation.
-+
-+Also warn about constructions where there may be confusion to which
-+@code{if} statement an @code{else} branch belongs. Here is an example of
-+such a case:
-+
-+@smallexample
-+@group
-+@{
-+ if (a)
-+ if (b)
-+ foo ();
-+ else
-+ bar ();
-+@}
-+@end group
-+@end smallexample
-+
-+In C/C++, every @code{else} branch belongs to the innermost possible
-+@code{if} statement, which in this example is @code{if (b)}. This is
-+often not what the programmer expected, as illustrated in the above
-+example by indentation the programmer chose. When there is the
-+potential for this confusion, GCC will issue a warning when this flag
-+is specified. To eliminate the warning, add explicit braces around
-+the innermost @code{if} statement so there is no way the @code{else}
-+could belong to the enclosing @code{if}. The resulting code would
-+look like this:
-+
-+@smallexample
-+@group
-+@{
-+ if (a)
-+ @{
-+ if (b)
-+ foo ();
-+ else
-+ bar ();
-+ @}
-+@}
-+@end group
-+@end smallexample
-+
-+This warning is enabled by @option{-Wall}.
-+
-+@item -Wsequence-point
-+@opindex Wsequence-point
-+@opindex Wno-sequence-point
-+Warn about code that may have undefined semantics because of violations
-+of sequence point rules in the C and C++ standards.
-+
-+The C and C++ standards defines the order in which expressions in a C/C++
-+program are evaluated in terms of @dfn{sequence points}, which represent
-+a partial ordering between the execution of parts of the program: those
-+executed before the sequence point, and those executed after it. These
-+occur after the evaluation of a full expression (one which is not part
-+of a larger expression), after the evaluation of the first operand of a
-+@code{&&}, @code{||}, @code{? :} or @code{,} (comma) operator, before a
-+function is called (but after the evaluation of its arguments and the
-+expression denoting the called function), and in certain other places.
-+Other than as expressed by the sequence point rules, the order of
-+evaluation of subexpressions of an expression is not specified. All
-+these rules describe only a partial order rather than a total order,
-+since, for example, if two functions are called within one expression
-+with no sequence point between them, the order in which the functions
-+are called is not specified. However, the standards committee have
-+ruled that function calls do not overlap.
-+
-+It is not specified when between sequence points modifications to the
-+values of objects take effect. Programs whose behavior depends on this
-+have undefined behavior; the C and C++ standards specify that ``Between
-+the previous and next sequence point an object shall have its stored
-+value modified at most once by the evaluation of an expression.
-+Furthermore, the prior value shall be read only to determine the value
-+to be stored.''. If a program breaks these rules, the results on any
-+particular implementation are entirely unpredictable.
-+
-+Examples of code with undefined behavior are @code{a = a++;}, @code{a[n]
-+= b[n++]} and @code{a[i++] = i;}. Some more complicated cases are not
-+diagnosed by this option, and it may give an occasional false positive
-+result, but in general it has been found fairly effective at detecting
-+this sort of problem in programs.
-+
-+The standard is worded confusingly, therefore there is some debate
-+over the precise meaning of the sequence point rules in subtle cases.
-+Links to discussions of the problem, including proposed formal
-+definitions, may be found on the GCC readings page, at
-+@w{@uref{http://gcc.gnu.org/readings.html}}.
-+
-+This warning is enabled by @option{-Wall} for C and C++.
-+
-+@item -Wreturn-type
-+@opindex Wreturn-type
-+@opindex Wno-return-type
-+Warn whenever a function is defined with a return-type that defaults
-+to @code{int}. Also warn about any @code{return} statement with no
-+return-value in a function whose return-type is not @code{void}
-+(falling off the end of the function body is considered returning
-+without a value), and about a @code{return} statement with a
-+expression in a function whose return-type is @code{void}.
-+
-+For C++, a function without return type always produces a diagnostic
-+message, even when @option{-Wno-return-type} is specified. The only
-+exceptions are @samp{main} and functions defined in system headers.
-+
-+This warning is enabled by @option{-Wall}.
-+
-+@item -Wswitch
-+@opindex Wswitch
-+@opindex Wno-switch
-+Warn whenever a @code{switch} statement has an index of enumerated type
-+and lacks a @code{case} for one or more of the named codes of that
-+enumeration. (The presence of a @code{default} label prevents this
-+warning.) @code{case} labels outside the enumeration range also
-+provoke warnings when this option is used.
-+This warning is enabled by @option{-Wall}.
-+
-+@item -Wswitch-default
-+@opindex Wswitch-default
-+@opindex Wno-switch-default
-+Warn whenever a @code{switch} statement does not have a @code{default}
-+case.
-+
-+@item -Wswitch-enum
-+@opindex Wswitch-enum
-+@opindex Wno-switch-enum
-+Warn whenever a @code{switch} statement has an index of enumerated type
-+and lacks a @code{case} for one or more of the named codes of that
-+enumeration. @code{case} labels outside the enumeration range also
-+provoke warnings when this option is used.
-+
-+@item -Wsync-nand @r{(C and C++ only)}
-+@opindex Wsync-nand
-+@opindex Wno-sync-nand
-+Warn when @code{__sync_fetch_and_nand} and @code{__sync_nand_and_fetch}
-+built-in functions are used. These functions changed semantics in GCC 4.4.
-+
-+@item -Wtrigraphs
-+@opindex Wtrigraphs
-+@opindex Wno-trigraphs
-+Warn if any trigraphs are encountered that might change the meaning of
-+the program (trigraphs within comments are not warned about).
-+This warning is enabled by @option{-Wall}.
-+
-+@item -Wunused-function
-+@opindex Wunused-function
-+@opindex Wno-unused-function
-+Warn whenever a static function is declared but not defined or a
-+non-inline static function is unused.
-+This warning is enabled by @option{-Wall}.
-+
-+@item -Wunused-label
-+@opindex Wunused-label
-+@opindex Wno-unused-label
-+Warn whenever a label is declared but not used.
-+This warning is enabled by @option{-Wall}.
-+
-+To suppress this warning use the @samp{unused} attribute
-+(@pxref{Variable Attributes}).
-+
-+@item -Wunused-parameter
-+@opindex Wunused-parameter
-+@opindex Wno-unused-parameter
-+Warn whenever a function parameter is unused aside from its declaration.
-+
-+To suppress this warning use the @samp{unused} attribute
-+(@pxref{Variable Attributes}).
-+
-+@item -Wunused-variable
-+@opindex Wunused-variable
-+@opindex Wno-unused-variable
-+Warn whenever a local variable or non-constant static variable is unused
-+aside from its declaration.
-+This warning is enabled by @option{-Wall}.
-+
-+To suppress this warning use the @samp{unused} attribute
-+(@pxref{Variable Attributes}).
-+
-+@item -Wunused-value
-+@opindex Wunused-value
-+@opindex Wno-unused-value
-+Warn whenever a statement computes a result that is explicitly not
-+used. To suppress this warning cast the unused expression to
-+@samp{void}. This includes an expression-statement or the left-hand
-+side of a comma expression that contains no side effects. For example,
-+an expression such as @samp{x[i,j]} will cause a warning, while
-+@samp{x[(void)i,j]} will not.
-+
-+This warning is enabled by @option{-Wall}.
-+
-+@item -Wunused
-+@opindex Wunused
-+@opindex Wno-unused
-+All the above @option{-Wunused} options combined.
-+
-+In order to get a warning about an unused function parameter, you must
-+either specify @samp{-Wextra -Wunused} (note that @samp{-Wall} implies
-+@samp{-Wunused}), or separately specify @option{-Wunused-parameter}.
-+
-+@item -Wuninitialized
-+@opindex Wuninitialized
-+@opindex Wno-uninitialized
-+Warn if an automatic variable is used without first being initialized
-+or if a variable may be clobbered by a @code{setjmp} call. In C++,
-+warn if a non-static reference or non-static @samp{const} member
-+appears in a class without constructors.
-+
-+If you want to warn about code which uses the uninitialized value of the
-+variable in its own initializer, use the @option{-Winit-self} option.
-+
-+These warnings occur for individual uninitialized or clobbered
-+elements of structure, union or array variables as well as for
-+variables which are uninitialized or clobbered as a whole. They do
-+not occur for variables or elements declared @code{volatile}. Because
-+these warnings depend on optimization, the exact variables or elements
-+for which there are warnings will depend on the precise optimization
-+options and version of GCC used.
-+
-+Note that there may be no warning about a variable that is used only
-+to compute a value that itself is never used, because such
-+computations may be deleted by data flow analysis before the warnings
-+are printed.
-+
-+These warnings are made optional because GCC is not smart
-+enough to see all the reasons why the code might be correct
-+despite appearing to have an error. Here is one example of how
-+this can happen:
-+
-+@smallexample
-+@group
-+@{
-+ int x;
-+ switch (y)
-+ @{
-+ case 1: x = 1;
-+ break;
-+ case 2: x = 4;
-+ break;
-+ case 3: x = 5;
-+ @}
-+ foo (x);
-+@}
-+@end group
-+@end smallexample
-+
-+@noindent
-+If the value of @code{y} is always 1, 2 or 3, then @code{x} is
-+always initialized, but GCC doesn't know this. Here is
-+another common case:
-+
-+@smallexample
-+@{
-+ int save_y;
-+ if (change_y) save_y = y, y = new_y;
-+ @dots{}
-+ if (change_y) y = save_y;
-+@}
-+@end smallexample
-+
-+@noindent
-+This has no bug because @code{save_y} is used only if it is set.
-+
-+@cindex @code{longjmp} warnings
-+This option also warns when a non-volatile automatic variable might be
-+changed by a call to @code{longjmp}. These warnings as well are possible
-+only in optimizing compilation.
-+
-+The compiler sees only the calls to @code{setjmp}. It cannot know
-+where @code{longjmp} will be called; in fact, a signal handler could
-+call it at any point in the code. As a result, you may get a warning
-+even when there is in fact no problem because @code{longjmp} cannot
-+in fact be called at the place which would cause a problem.
-+
-+Some spurious warnings can be avoided if you declare all the functions
-+you use that never return as @code{noreturn}. @xref{Function
-+Attributes}.
-+
-+This warning is enabled by @option{-Wall} or @option{-Wextra}.
-+
-+@item -Wunknown-pragmas
-+@opindex Wunknown-pragmas
-+@opindex Wno-unknown-pragmas
-+@cindex warning for unknown pragmas
-+@cindex unknown pragmas, warning
-+@cindex pragmas, warning of unknown
-+Warn when a #pragma directive is encountered which is not understood by
-+GCC@. If this command line option is used, warnings will even be issued
-+for unknown pragmas in system header files. This is not the case if
-+the warnings were only enabled by the @option{-Wall} command line option.
-+
-+@item -Wno-pragmas
-+@opindex Wno-pragmas
-+@opindex Wpragmas
-+Do not warn about misuses of pragmas, such as incorrect parameters,
-+invalid syntax, or conflicts between pragmas. See also
-+@samp{-Wunknown-pragmas}.
-+
-+@item -Wstrict-aliasing
-+@opindex Wstrict-aliasing
-+@opindex Wno-strict-aliasing
-+This option is only active when @option{-fstrict-aliasing} is active.
-+It warns about code which might break the strict aliasing rules that the
-+compiler is using for optimization. The warning does not catch all
-+cases, but does attempt to catch the more common pitfalls. It is
-+included in @option{-Wall}.
-+It is equivalent to @option{-Wstrict-aliasing=3}
-+
-+@item -Wstrict-aliasing=n
-+@opindex Wstrict-aliasing=n
-+@opindex Wno-strict-aliasing=n
-+This option is only active when @option{-fstrict-aliasing} is active.
-+It warns about code which might break the strict aliasing rules that the
-+compiler is using for optimization.
-+Higher levels correspond to higher accuracy (fewer false positives).
-+Higher levels also correspond to more effort, similar to the way -O works.
-+@option{-Wstrict-aliasing} is equivalent to @option{-Wstrict-aliasing=n},
-+with n=3.
-+
-+Level 1: Most aggressive, quick, least accurate.
-+Possibly useful when higher levels
-+do not warn but -fstrict-aliasing still breaks the code, as it has very few
-+false negatives. However, it has many false positives.
-+Warns for all pointer conversions between possibly incompatible types,
-+even if never dereferenced. Runs in the frontend only.
-+
-+Level 2: Aggressive, quick, not too precise.
-+May still have many false positives (not as many as level 1 though),
-+and few false negatives (but possibly more than level 1).
-+Unlike level 1, it only warns when an address is taken. Warns about
-+incomplete types. Runs in the frontend only.
-+
-+Level 3 (default for @option{-Wstrict-aliasing}):
-+Should have very few false positives and few false
-+negatives. Slightly slower than levels 1 or 2 when optimization is enabled.
-+Takes care of the common punn+dereference pattern in the frontend:
-+@code{*(int*)&some_float}.
-+If optimization is enabled, it also runs in the backend, where it deals
-+with multiple statement cases using flow-sensitive points-to information.
-+Only warns when the converted pointer is dereferenced.
-+Does not warn about incomplete types.
-+
-+@item -Wstrict-overflow
-+@itemx -Wstrict-overflow=@var{n}
-+@opindex Wstrict-overflow
-+@opindex Wno-strict-overflow
-+This option is only active when @option{-fstrict-overflow} is active.
-+It warns about cases where the compiler optimizes based on the
-+assumption that signed overflow does not occur. Note that it does not
-+warn about all cases where the code might overflow: it only warns
-+about cases where the compiler implements some optimization. Thus
-+this warning depends on the optimization level.
-+
-+An optimization which assumes that signed overflow does not occur is
-+perfectly safe if the values of the variables involved are such that
-+overflow never does, in fact, occur. Therefore this warning can
-+easily give a false positive: a warning about code which is not
-+actually a problem. To help focus on important issues, several
-+warning levels are defined. No warnings are issued for the use of
-+undefined signed overflow when estimating how many iterations a loop
-+will require, in particular when determining whether a loop will be
-+executed at all.
-+
-+@table @gcctabopt
-+@item -Wstrict-overflow=1
-+Warn about cases which are both questionable and easy to avoid. For
-+example: @code{x + 1 > x}; with @option{-fstrict-overflow}, the
-+compiler will simplify this to @code{1}. This level of
-+@option{-Wstrict-overflow} is enabled by @option{-Wall}; higher levels
-+are not, and must be explicitly requested.
-+
-+@item -Wstrict-overflow=2
-+Also warn about other cases where a comparison is simplified to a
-+constant. For example: @code{abs (x) >= 0}. This can only be
-+simplified when @option{-fstrict-overflow} is in effect, because
-+@code{abs (INT_MIN)} overflows to @code{INT_MIN}, which is less than
-+zero. @option{-Wstrict-overflow} (with no level) is the same as
-+@option{-Wstrict-overflow=2}.
-+
-+@item -Wstrict-overflow=3
-+Also warn about other cases where a comparison is simplified. For
-+example: @code{x + 1 > 1} will be simplified to @code{x > 0}.
-+
-+@item -Wstrict-overflow=4
-+Also warn about other simplifications not covered by the above cases.
-+For example: @code{(x * 10) / 5} will be simplified to @code{x * 2}.
-+
-+@item -Wstrict-overflow=5
-+Also warn about cases where the compiler reduces the magnitude of a
-+constant involved in a comparison. For example: @code{x + 2 > y} will
-+be simplified to @code{x + 1 >= y}. This is reported only at the
-+highest warning level because this simplification applies to many
-+comparisons, so this warning level will give a very large number of
-+false positives.
-+@end table
-+
-+@item -Warray-bounds
-+@opindex Wno-array-bounds
-+@opindex Warray-bounds
-+This option is only active when @option{-ftree-vrp} is active
-+(default for -O2 and above). It warns about subscripts to arrays
-+that are always out of bounds. This warning is enabled by @option{-Wall}.
-+
-+@item -Wno-div-by-zero
-+@opindex Wno-div-by-zero
-+@opindex Wdiv-by-zero
-+Do not warn about compile-time integer division by zero. Floating point
-+division by zero is not warned about, as it can be a legitimate way of
-+obtaining infinities and NaNs.
-+
-+@item -Wsystem-headers
-+@opindex Wsystem-headers
-+@opindex Wno-system-headers
-+@cindex warnings from system headers
-+@cindex system headers, warnings from
-+Print warning messages for constructs found in system header files.
-+Warnings from system headers are normally suppressed, on the assumption
-+that they usually do not indicate real problems and would only make the
-+compiler output harder to read. Using this command line option tells
-+GCC to emit warnings from system headers as if they occurred in user
-+code. However, note that using @option{-Wall} in conjunction with this
-+option will @emph{not} warn about unknown pragmas in system
-+headers---for that, @option{-Wunknown-pragmas} must also be used.
-+
-+@item -Wfloat-equal
-+@opindex Wfloat-equal
-+@opindex Wno-float-equal
-+Warn if floating point values are used in equality comparisons.
-+
-+The idea behind this is that sometimes it is convenient (for the
-+programmer) to consider floating-point values as approximations to
-+infinitely precise real numbers. If you are doing this, then you need
-+to compute (by analyzing the code, or in some other way) the maximum or
-+likely maximum error that the computation introduces, and allow for it
-+when performing comparisons (and when producing output, but that's a
-+different problem). In particular, instead of testing for equality, you
-+would check to see whether the two values have ranges that overlap; and
-+this is done with the relational operators, so equality comparisons are
-+probably mistaken.
-+
-+@item -Wtraditional @r{(C and Objective-C only)}
-+@opindex Wtraditional
-+@opindex Wno-traditional
-+Warn about certain constructs that behave differently in traditional and
-+ISO C@. Also warn about ISO C constructs that have no traditional C
-+equivalent, and/or problematic constructs which should be avoided.
-+
-+@itemize @bullet
-+@item
-+Macro parameters that appear within string literals in the macro body.
-+In traditional C macro replacement takes place within string literals,
-+but does not in ISO C@.
-+
-+@item
-+In traditional C, some preprocessor directives did not exist.
-+Traditional preprocessors would only consider a line to be a directive
-+if the @samp{#} appeared in column 1 on the line. Therefore
-+@option{-Wtraditional} warns about directives that traditional C
-+understands but would ignore because the @samp{#} does not appear as the
-+first character on the line. It also suggests you hide directives like
-+@samp{#pragma} not understood by traditional C by indenting them. Some
-+traditional implementations would not recognize @samp{#elif}, so it
-+suggests avoiding it altogether.
-+
-+@item
-+A function-like macro that appears without arguments.
-+
-+@item
-+The unary plus operator.
-+
-+@item
-+The @samp{U} integer constant suffix, or the @samp{F} or @samp{L} floating point
-+constant suffixes. (Traditional C does support the @samp{L} suffix on integer
-+constants.) Note, these suffixes appear in macros defined in the system
-+headers of most modern systems, e.g.@: the @samp{_MIN}/@samp{_MAX} macros in @code{<limits.h>}.
-+Use of these macros in user code might normally lead to spurious
-+warnings, however GCC's integrated preprocessor has enough context to
-+avoid warning in these cases.
-+
-+@item
-+A function declared external in one block and then used after the end of
-+the block.
-+
-+@item
-+A @code{switch} statement has an operand of type @code{long}.
-+
-+@item
-+A non-@code{static} function declaration follows a @code{static} one.
-+This construct is not accepted by some traditional C compilers.
-+
-+@item
-+The ISO type of an integer constant has a different width or
-+signedness from its traditional type. This warning is only issued if
-+the base of the constant is ten. I.e.@: hexadecimal or octal values, which
-+typically represent bit patterns, are not warned about.
-+
-+@item
-+Usage of ISO string concatenation is detected.
-+
-+@item
-+Initialization of automatic aggregates.
-+
-+@item
-+Identifier conflicts with labels. Traditional C lacks a separate
-+namespace for labels.
-+
-+@item
-+Initialization of unions. If the initializer is zero, the warning is
-+omitted. This is done under the assumption that the zero initializer in
-+user code appears conditioned on e.g.@: @code{__STDC__} to avoid missing
-+initializer warnings and relies on default initialization to zero in the
-+traditional C case.
-+
-+@item
-+Conversions by prototypes between fixed/floating point values and vice
-+versa. The absence of these prototypes when compiling with traditional
-+C would cause serious problems. This is a subset of the possible
-+conversion warnings, for the full set use @option{-Wtraditional-conversion}.
-+
-+@item
-+Use of ISO C style function definitions. This warning intentionally is
-+@emph{not} issued for prototype declarations or variadic functions
-+because these ISO C features will appear in your code when using
-+libiberty's traditional C compatibility macros, @code{PARAMS} and
-+@code{VPARAMS}. This warning is also bypassed for nested functions
-+because that feature is already a GCC extension and thus not relevant to
-+traditional C compatibility.
-+@end itemize
-+
-+@item -Wtraditional-conversion @r{(C and Objective-C only)}
-+@opindex Wtraditional-conversion
-+@opindex Wno-traditional-conversion
-+Warn if a prototype causes a type conversion that is different from what
-+would happen to the same argument in the absence of a prototype. This
-+includes conversions of fixed point to floating and vice versa, and
-+conversions changing the width or signedness of a fixed point argument
-+except when the same as the default promotion.
-+
-+@item -Wdeclaration-after-statement @r{(C and Objective-C only)}
-+@opindex Wdeclaration-after-statement
-+@opindex Wno-declaration-after-statement
-+Warn when a declaration is found after a statement in a block. This
-+construct, known from C++, was introduced with ISO C99 and is by default
-+allowed in GCC@. It is not supported by ISO C90 and was not supported by
-+GCC versions before GCC 3.0. @xref{Mixed Declarations}.
-+
-+@item -Wundef
-+@opindex Wundef
-+@opindex Wno-undef
-+Warn if an undefined identifier is evaluated in an @samp{#if} directive.
-+
-+@item -Wno-endif-labels
-+@opindex Wno-endif-labels
-+@opindex Wendif-labels
-+Do not warn whenever an @samp{#else} or an @samp{#endif} are followed by text.
-+
-+@item -Wshadow
-+@opindex Wshadow
-+@opindex Wno-shadow
-+Warn whenever a local variable shadows another local variable, parameter or
-+global variable or whenever a built-in function is shadowed.
-+
-+@item -Wlarger-than=@var{len}
-+@opindex Wlarger-than=@var{len}
-+@opindex Wlarger-than-@var{len}
-+Warn whenever an object of larger than @var{len} bytes is defined.
-+
-+@item -Wframe-larger-than=@var{len}
-+@opindex Wframe-larger-than
-+Warn if the size of a function frame is larger than @var{len} bytes.
-+The computation done to determine the stack frame size is approximate
-+and not conservative.
-+The actual requirements may be somewhat greater than @var{len}
-+even if you do not get a warning. In addition, any space allocated
-+via @code{alloca}, variable-length arrays, or related constructs
-+is not included by the compiler when determining
-+whether or not to issue a warning.
-+
-+@item -Wunsafe-loop-optimizations
-+@opindex Wunsafe-loop-optimizations
-+@opindex Wno-unsafe-loop-optimizations
-+Warn if the loop cannot be optimized because the compiler could not
-+assume anything on the bounds of the loop indices. With
-+@option{-funsafe-loop-optimizations} warn if the compiler made
-+such assumptions.
-+
-+@item -Wno-pedantic-ms-format @r{(MinGW targets only)}
-+@opindex Wno-pedantic-ms-format
-+@opindex Wpedantic-ms-format
-+Disables the warnings about non-ISO @code{printf} / @code{scanf} format
-+width specifiers @code{I32}, @code{I64}, and @code{I} used on Windows targets
-+depending on the MS runtime, when you are using the options @option{-Wformat}
-+and @option{-pedantic} without gnu-extensions.
-+
-+@item -Wpointer-arith
-+@opindex Wpointer-arith
-+@opindex Wno-pointer-arith
-+Warn about anything that depends on the ``size of'' a function type or
-+of @code{void}. GNU C assigns these types a size of 1, for
-+convenience in calculations with @code{void *} pointers and pointers
-+to functions. In C++, warn also when an arithmetic operation involves
-+@code{NULL}. This warning is also enabled by @option{-pedantic}.
-+
-+@item -Wtype-limits
-+@opindex Wtype-limits
-+@opindex Wno-type-limits
-+Warn if a comparison is always true or always false due to the limited
-+range of the data type, but do not warn for constant expressions. For
-+example, warn if an unsigned variable is compared against zero with
-+@samp{<} or @samp{>=}. This warning is also enabled by
-+@option{-Wextra}.
-+
-+@item -Wbad-function-cast @r{(C and Objective-C only)}
-+@opindex Wbad-function-cast
-+@opindex Wno-bad-function-cast
-+Warn whenever a function call is cast to a non-matching type.
-+For example, warn if @code{int malloc()} is cast to @code{anything *}.
-+
-+@item -Wc++-compat @r{(C and Objective-C only)}
-+Warn about ISO C constructs that are outside of the common subset of
-+ISO C and ISO C++, e.g.@: request for implicit conversion from
-+@code{void *} to a pointer to non-@code{void} type.
-+
-+@item -Wc++0x-compat @r{(C++ and Objective-C++ only)}
-+Warn about C++ constructs whose meaning differs between ISO C++ 1998 and
-+ISO C++ 200x, e.g., identifiers in ISO C++ 1998 that will become keywords
-+in ISO C++ 200x. This warning is enabled by @option{-Wall}.
-+
-+@item -Wcast-qual
-+@opindex Wcast-qual
-+@opindex Wno-cast-qual
-+Warn whenever a pointer is cast so as to remove a type qualifier from
-+the target type. For example, warn if a @code{const char *} is cast
-+to an ordinary @code{char *}.
-+
-+@item -Wcast-align
-+@opindex Wcast-align
-+@opindex Wno-cast-align
-+Warn whenever a pointer is cast such that the required alignment of the
-+target is increased. For example, warn if a @code{char *} is cast to
-+an @code{int *} on machines where integers can only be accessed at
-+two- or four-byte boundaries.
-+
-+@item -Wwrite-strings
-+@opindex Wwrite-strings
-+@opindex Wno-write-strings
-+When compiling C, give string constants the type @code{const
-+char[@var{length}]} so that copying the address of one into a
-+non-@code{const} @code{char *} pointer will get a warning. These
-+warnings will help you find at compile time code that can try to write
-+into a string constant, but only if you have been very careful about
-+using @code{const} in declarations and prototypes. Otherwise, it will
-+just be a nuisance. This is why we did not make @option{-Wall} request
-+these warnings.
-+
-+When compiling C++, warn about the deprecated conversion from string
-+literals to @code{char *}. This warning is enabled by default for C++
-+programs.
-+
-+@item -Wclobbered
-+@opindex Wclobbered
-+@opindex Wno-clobbered
-+Warn for variables that might be changed by @samp{longjmp} or
-+@samp{vfork}. This warning is also enabled by @option{-Wextra}.
-+
-+@item -Wconversion
-+@opindex Wconversion
-+@opindex Wno-conversion
-+Warn for implicit conversions that may alter a value. This includes
-+conversions between real and integer, like @code{abs (x)} when
-+@code{x} is @code{double}; conversions between signed and unsigned,
-+like @code{unsigned ui = -1}; and conversions to smaller types, like
-+@code{sqrtf (M_PI)}. Do not warn for explicit casts like @code{abs
-+((int) x)} and @code{ui = (unsigned) -1}, or if the value is not
-+changed by the conversion like in @code{abs (2.0)}. Warnings about
-+conversions between signed and unsigned integers can be disabled by
-+using @option{-Wno-sign-conversion}.
-+
-+For C++, also warn for conversions between @code{NULL} and non-pointer
-+types; confusing overload resolution for user-defined conversions; and
-+conversions that will never use a type conversion operator:
-+conversions to @code{void}, the same type, a base class or a reference
-+to them. Warnings about conversions between signed and unsigned
-+integers are disabled by default in C++ unless
-+@option{-Wsign-conversion} is explicitly enabled.
-+
-+@item -Wempty-body
-+@opindex Wempty-body
-+@opindex Wno-empty-body
-+Warn if an empty body occurs in an @samp{if}, @samp{else} or @samp{do
-+while} statement. This warning is also enabled by @option{-Wextra}.
-+
-+@item -Wenum-compare @r{(C++ and Objective-C++ only)}
-+@opindex Wenum-compare
-+@opindex Wno-enum-compare
-+Warn about a comparison between values of different enum types. This
-+warning is enabled by default.
-+
-+@item -Wsign-compare
-+@opindex Wsign-compare
-+@opindex Wno-sign-compare
-+@cindex warning for comparison of signed and unsigned values
-+@cindex comparison of signed and unsigned values, warning
-+@cindex signed and unsigned values, comparison warning
-+Warn when a comparison between signed and unsigned values could produce
-+an incorrect result when the signed value is converted to unsigned.
-+This warning is also enabled by @option{-Wextra}; to get the other warnings
-+of @option{-Wextra} without this warning, use @samp{-Wextra -Wno-sign-compare}.
-+
-+@item -Wsign-conversion
-+@opindex Wsign-conversion
-+@opindex Wno-sign-conversion
-+Warn for implicit conversions that may change the sign of an integer
-+value, like assigning a signed integer expression to an unsigned
-+integer variable. An explicit cast silences the warning. In C, this
-+option is enabled also by @option{-Wconversion}.
-+
-+@item -Waddress
-+@opindex Waddress
-+@opindex Wno-address
-+Warn about suspicious uses of memory addresses. These include using
-+the address of a function in a conditional expression, such as
-+@code{void func(void); if (func)}, and comparisons against the memory
-+address of a string literal, such as @code{if (x == "abc")}. Such
-+uses typically indicate a programmer error: the address of a function
-+always evaluates to true, so their use in a conditional usually
-+indicate that the programmer forgot the parentheses in a function
-+call; and comparisons against string literals result in unspecified
-+behavior and are not portable in C, so they usually indicate that the
-+programmer intended to use @code{strcmp}. This warning is enabled by
-+@option{-Wall}.
-+
-+@item -Wlogical-op
-+@opindex Wlogical-op
-+@opindex Wno-logical-op
-+Warn about suspicious uses of logical operators in expressions.
-+This includes using logical operators in contexts where a
-+bit-wise operator is likely to be expected.
-+
-+@item -Waggregate-return
-+@opindex Waggregate-return
-+@opindex Wno-aggregate-return
-+Warn if any functions that return structures or unions are defined or
-+called. (In languages where you can return an array, this also elicits
-+a warning.)
-+
-+@item -Wno-attributes
-+@opindex Wno-attributes
-+@opindex Wattributes
-+Do not warn if an unexpected @code{__attribute__} is used, such as
-+unrecognized attributes, function attributes applied to variables,
-+etc. This will not stop errors for incorrect use of supported
-+attributes.
-+
-+@item -Wno-builtin-macro-redefined
-+@opindex Wno-builtin-macro-redefined
-+@opindex Wbuiltin-macro-redefined
-+Do not warn if certain built-in macros are redefined. This suppresses
-+warnings for redefinition of @code{__TIMESTAMP__}, @code{__TIME__},
-+@code{__DATE__}, @code{__FILE__}, and @code{__BASE_FILE__}.
-+
-+@item -Wstrict-prototypes @r{(C and Objective-C only)}
-+@opindex Wstrict-prototypes
-+@opindex Wno-strict-prototypes
-+Warn if a function is declared or defined without specifying the
-+argument types. (An old-style function definition is permitted without
-+a warning if preceded by a declaration which specifies the argument
-+types.)
-+
-+@item -Wold-style-declaration @r{(C and Objective-C only)}
-+@opindex Wold-style-declaration
-+@opindex Wno-old-style-declaration
-+Warn for obsolescent usages, according to the C Standard, in a
-+declaration. For example, warn if storage-class specifiers like
-+@code{static} are not the first things in a declaration. This warning
-+is also enabled by @option{-Wextra}.
-+
-+@item -Wold-style-definition @r{(C and Objective-C only)}
-+@opindex Wold-style-definition
-+@opindex Wno-old-style-definition
-+Warn if an old-style function definition is used. A warning is given
-+even if there is a previous prototype.
-+
-+@item -Wmissing-parameter-type @r{(C and Objective-C only)}
-+@opindex Wmissing-parameter-type
-+@opindex Wno-missing-parameter-type
-+A function parameter is declared without a type specifier in K&R-style
-+functions:
-+
-+@smallexample
-+void foo(bar) @{ @}
-+@end smallexample
-+
-+This warning is also enabled by @option{-Wextra}.
-+
-+@item -Wmissing-prototypes @r{(C and Objective-C only)}
-+@opindex Wmissing-prototypes
-+@opindex Wno-missing-prototypes
-+Warn if a global function is defined without a previous prototype
-+declaration. This warning is issued even if the definition itself
-+provides a prototype. The aim is to detect global functions that fail
-+to be declared in header files.
-+
-+@item -Wmissing-declarations
-+@opindex Wmissing-declarations
-+@opindex Wno-missing-declarations
-+Warn if a global function is defined without a previous declaration.
-+Do so even if the definition itself provides a prototype.
-+Use this option to detect global functions that are not declared in
-+header files. In C++, no warnings are issued for function templates,
-+or for inline functions, or for functions in anonymous namespaces.
-+
-+@item -Wmissing-field-initializers
-+@opindex Wmissing-field-initializers
-+@opindex Wno-missing-field-initializers
-+@opindex W
-+@opindex Wextra
-+@opindex Wno-extra
-+Warn if a structure's initializer has some fields missing. For
-+example, the following code would cause such a warning, because
-+@code{x.h} is implicitly zero:
-+
-+@smallexample
-+struct s @{ int f, g, h; @};
-+struct s x = @{ 3, 4 @};
-+@end smallexample
-+
-+This option does not warn about designated initializers, so the following
-+modification would not trigger a warning:
-+
-+@smallexample
-+struct s @{ int f, g, h; @};
-+struct s x = @{ .f = 3, .g = 4 @};
-+@end smallexample
-+
-+This warning is included in @option{-Wextra}. To get other @option{-Wextra}
-+warnings without this one, use @samp{-Wextra -Wno-missing-field-initializers}.
-+
-+@item -Wmissing-noreturn
-+@opindex Wmissing-noreturn
-+@opindex Wno-missing-noreturn
-+Warn about functions which might be candidates for attribute @code{noreturn}.
-+Note these are only possible candidates, not absolute ones. Care should
-+be taken to manually verify functions actually do not ever return before
-+adding the @code{noreturn} attribute, otherwise subtle code generation
-+bugs could be introduced. You will not get a warning for @code{main} in
-+hosted C environments.
-+
-+@item -Wmissing-format-attribute
-+@opindex Wmissing-format-attribute
-+@opindex Wno-missing-format-attribute
-+@opindex Wformat
-+@opindex Wno-format
-+Warn about function pointers which might be candidates for @code{format}
-+attributes. Note these are only possible candidates, not absolute ones.
-+GCC will guess that function pointers with @code{format} attributes that
-+are used in assignment, initialization, parameter passing or return
-+statements should have a corresponding @code{format} attribute in the
-+resulting type. I.e.@: the left-hand side of the assignment or
-+initialization, the type of the parameter variable, or the return type
-+of the containing function respectively should also have a @code{format}
-+attribute to avoid the warning.
-+
-+GCC will also warn about function definitions which might be
-+candidates for @code{format} attributes. Again, these are only
-+possible candidates. GCC will guess that @code{format} attributes
-+might be appropriate for any function that calls a function like
-+@code{vprintf} or @code{vscanf}, but this might not always be the
-+case, and some functions for which @code{format} attributes are
-+appropriate may not be detected.
-+
-+@item -Wno-multichar
-+@opindex Wno-multichar
-+@opindex Wmultichar
-+Do not warn if a multicharacter constant (@samp{'FOOF'}) is used.
-+Usually they indicate a typo in the user's code, as they have
-+implementation-defined values, and should not be used in portable code.
-+
-+@item -Wnormalized=<none|id|nfc|nfkc>
-+@opindex Wnormalized=
-+@cindex NFC
-+@cindex NFKC
-+@cindex character set, input normalization
-+In ISO C and ISO C++, two identifiers are different if they are
-+different sequences of characters. However, sometimes when characters
-+outside the basic ASCII character set are used, you can have two
-+different character sequences that look the same. To avoid confusion,
-+the ISO 10646 standard sets out some @dfn{normalization rules} which
-+when applied ensure that two sequences that look the same are turned into
-+the same sequence. GCC can warn you if you are using identifiers which
-+have not been normalized; this option controls that warning.
-+
-+There are four levels of warning that GCC supports. The default is
-+@option{-Wnormalized=nfc}, which warns about any identifier which is
-+not in the ISO 10646 ``C'' normalized form, @dfn{NFC}. NFC is the
-+recommended form for most uses.
-+
-+Unfortunately, there are some characters which ISO C and ISO C++ allow
-+in identifiers that when turned into NFC aren't allowable as
-+identifiers. That is, there's no way to use these symbols in portable
-+ISO C or C++ and have all your identifiers in NFC@.
-+@option{-Wnormalized=id} suppresses the warning for these characters.
-+It is hoped that future versions of the standards involved will correct
-+this, which is why this option is not the default.
-+
-+You can switch the warning off for all characters by writing
-+@option{-Wnormalized=none}. You would only want to do this if you
-+were using some other normalization scheme (like ``D''), because
-+otherwise you can easily create bugs that are literally impossible to see.
-+
-+Some characters in ISO 10646 have distinct meanings but look identical
-+in some fonts or display methodologies, especially once formatting has
-+been applied. For instance @code{\u207F}, ``SUPERSCRIPT LATIN SMALL
-+LETTER N'', will display just like a regular @code{n} which has been
-+placed in a superscript. ISO 10646 defines the @dfn{NFKC}
-+normalization scheme to convert all these into a standard form as
-+well, and GCC will warn if your code is not in NFKC if you use
-+@option{-Wnormalized=nfkc}. This warning is comparable to warning
-+about every identifier that contains the letter O because it might be
-+confused with the digit 0, and so is not the default, but may be
-+useful as a local coding convention if the programming environment is
-+unable to be fixed to display these characters distinctly.
-+
-+@item -Wno-deprecated
-+@opindex Wno-deprecated
-+@opindex Wdeprecated
-+Do not warn about usage of deprecated features. @xref{Deprecated Features}.
-+
-+@item -Wno-deprecated-declarations
-+@opindex Wno-deprecated-declarations
-+@opindex Wdeprecated-declarations
-+Do not warn about uses of functions (@pxref{Function Attributes}),
-+variables (@pxref{Variable Attributes}), and types (@pxref{Type
-+Attributes}) marked as deprecated by using the @code{deprecated}
-+attribute.
-+
-+@item -Wno-overflow
-+@opindex Wno-overflow
-+@opindex Woverflow
-+Do not warn about compile-time overflow in constant expressions.
-+
-+@item -Woverride-init @r{(C and Objective-C only)}
-+@opindex Woverride-init
-+@opindex Wno-override-init
-+@opindex W
-+@opindex Wextra
-+@opindex Wno-extra
-+Warn if an initialized field without side effects is overridden when
-+using designated initializers (@pxref{Designated Inits, , Designated
-+Initializers}).
-+
-+This warning is included in @option{-Wextra}. To get other
-+@option{-Wextra} warnings without this one, use @samp{-Wextra
-+-Wno-override-init}.
-+
-+@item -Wpacked
-+@opindex Wpacked
-+@opindex Wno-packed
-+Warn if a structure is given the packed attribute, but the packed
-+attribute has no effect on the layout or size of the structure.
-+Such structures may be mis-aligned for little benefit. For
-+instance, in this code, the variable @code{f.x} in @code{struct bar}
-+will be misaligned even though @code{struct bar} does not itself
-+have the packed attribute:
-+
-+@smallexample
-+@group
-+struct foo @{
-+ int x;
-+ char a, b, c, d;
-+@} __attribute__((packed));
-+struct bar @{
-+ char z;
-+ struct foo f;
-+@};
-+@end group
-+@end smallexample
-+
-+@item -Wpacked-bitfield-compat
-+@opindex Wpacked-bitfield-compat
-+@opindex Wno-packed-bitfield-compat
-+The 4.1, 4.2 and 4.3 series of GCC ignore the @code{packed} attribute
-+on bit-fields of type @code{char}. This has been fixed in GCC 4.4 but
-+the change can lead to differences in the structure layout. GCC
-+informs you when the offset of such a field has changed in GCC 4.4.
-+For example there is no longer a 4-bit padding between field @code{a}
-+and @code{b} in this structure:
-+
-+@smallexample
-+struct foo
-+@{
-+ char a:4;
-+ char b:8;
-+@} __attribute__ ((packed));
-+@end smallexample
-+
-+This warning is enabled by default. Use
-+@option{-Wno-packed-bitfield-compat} to disable this warning.
-+
-+@item -Wpadded
-+@opindex Wpadded
-+@opindex Wno-padded
-+Warn if padding is included in a structure, either to align an element
-+of the structure or to align the whole structure. Sometimes when this
-+happens it is possible to rearrange the fields of the structure to
-+reduce the padding and so make the structure smaller.
-+
-+@item -Wredundant-decls
-+@opindex Wredundant-decls
-+@opindex Wno-redundant-decls
-+Warn if anything is declared more than once in the same scope, even in
-+cases where multiple declaration is valid and changes nothing.
-+
-+@item -Wnested-externs @r{(C and Objective-C only)}
-+@opindex Wnested-externs
-+@opindex Wno-nested-externs
-+Warn if an @code{extern} declaration is encountered within a function.
-+
-+@item -Wunreachable-code
-+@opindex Wunreachable-code
-+@opindex Wno-unreachable-code
-+Warn if the compiler detects that code will never be executed.
-+
-+This option is intended to warn when the compiler detects that at
-+least a whole line of source code will never be executed, because
-+some condition is never satisfied or because it is after a
-+procedure that never returns.
-+
-+It is possible for this option to produce a warning even though there
-+are circumstances under which part of the affected line can be executed,
-+so care should be taken when removing apparently-unreachable code.
-+
-+For instance, when a function is inlined, a warning may mean that the
-+line is unreachable in only one inlined copy of the function.
-+
-+This option is not made part of @option{-Wall} because in a debugging
-+version of a program there is often substantial code which checks
-+correct functioning of the program and is, hopefully, unreachable
-+because the program does work. Another common use of unreachable
-+code is to provide behavior which is selectable at compile-time.
-+
-+@item -Winline
-+@opindex Winline
-+@opindex Wno-inline
-+Warn if a function can not be inlined and it was declared as inline.
-+Even with this option, the compiler will not warn about failures to
-+inline functions declared in system headers.
-+
-+The compiler uses a variety of heuristics to determine whether or not
-+to inline a function. For example, the compiler takes into account
-+the size of the function being inlined and the amount of inlining
-+that has already been done in the current function. Therefore,
-+seemingly insignificant changes in the source program can cause the
-+warnings produced by @option{-Winline} to appear or disappear.
-+
-+@item -Wno-invalid-offsetof @r{(C++ and Objective-C++ only)}
-+@opindex Wno-invalid-offsetof
-+@opindex Winvalid-offsetof
-+Suppress warnings from applying the @samp{offsetof} macro to a non-POD
-+type. According to the 1998 ISO C++ standard, applying @samp{offsetof}
-+to a non-POD type is undefined. In existing C++ implementations,
-+however, @samp{offsetof} typically gives meaningful results even when
-+applied to certain kinds of non-POD types. (Such as a simple
-+@samp{struct} that fails to be a POD type only by virtue of having a
-+constructor.) This flag is for users who are aware that they are
-+writing nonportable code and who have deliberately chosen to ignore the
-+warning about it.
-+
-+The restrictions on @samp{offsetof} may be relaxed in a future version
-+of the C++ standard.
-+
-+@item -Wno-int-to-pointer-cast @r{(C and Objective-C only)}
-+@opindex Wno-int-to-pointer-cast
-+@opindex Wint-to-pointer-cast
-+Suppress warnings from casts to pointer type of an integer of a
-+different size.
-+
-+@item -Wno-pointer-to-int-cast @r{(C and Objective-C only)}
-+@opindex Wno-pointer-to-int-cast
-+@opindex Wpointer-to-int-cast
-+Suppress warnings from casts from a pointer to an integer type of a
-+different size.
-+
-+@item -Winvalid-pch
-+@opindex Winvalid-pch
-+@opindex Wno-invalid-pch
-+Warn if a precompiled header (@pxref{Precompiled Headers}) is found in
-+the search path but can't be used.
-+
-+@item -Wlong-long
-+@opindex Wlong-long
-+@opindex Wno-long-long
-+Warn if @samp{long long} type is used. This is default. To inhibit
-+the warning messages, use @option{-Wno-long-long}. Flags
-+@option{-Wlong-long} and @option{-Wno-long-long} are taken into account
-+only when @option{-pedantic} flag is used.
-+
-+@item -Wvariadic-macros
-+@opindex Wvariadic-macros
-+@opindex Wno-variadic-macros
-+Warn if variadic macros are used in pedantic ISO C90 mode, or the GNU
-+alternate syntax when in pedantic ISO C99 mode. This is default.
-+To inhibit the warning messages, use @option{-Wno-variadic-macros}.
-+
-+@item -Wvla
-+@opindex Wvla
-+@opindex Wno-vla
-+Warn if variable length array is used in the code.
-+@option{-Wno-vla} will prevent the @option{-pedantic} warning of
-+the variable length array.
-+
-+@item -Wvolatile-register-var
-+@opindex Wvolatile-register-var
-+@opindex Wno-volatile-register-var
-+Warn if a register variable is declared volatile. The volatile
-+modifier does not inhibit all optimizations that may eliminate reads
-+and/or writes to register variables. This warning is enabled by
-+@option{-Wall}.
-+
-+@item -Wdisabled-optimization
-+@opindex Wdisabled-optimization
-+@opindex Wno-disabled-optimization
-+Warn if a requested optimization pass is disabled. This warning does
-+not generally indicate that there is anything wrong with your code; it
-+merely indicates that GCC's optimizers were unable to handle the code
-+effectively. Often, the problem is that your code is too big or too
-+complex; GCC will refuse to optimize programs when the optimization
-+itself is likely to take inordinate amounts of time.
-+
-+@item -Wpointer-sign @r{(C and Objective-C only)}
-+@opindex Wpointer-sign
-+@opindex Wno-pointer-sign
-+Warn for pointer argument passing or assignment with different signedness.
-+This option is only supported for C and Objective-C@. It is implied by
-+@option{-Wall} and by @option{-pedantic}, which can be disabled with
-+@option{-Wno-pointer-sign}.
-+
-+@item -Wstack-protector
-+@opindex Wstack-protector
-+@opindex Wno-stack-protector
-+This option is only active when @option{-fstack-protector} is active. It
-+warns about functions that will not be protected against stack smashing.
-+
-+@item -Wno-mudflap
-+@opindex Wno-mudflap
-+Suppress warnings about constructs that cannot be instrumented by
-+@option{-fmudflap}.
-+
-+@item -Woverlength-strings
-+@opindex Woverlength-strings
-+@opindex Wno-overlength-strings
-+Warn about string constants which are longer than the ``minimum
-+maximum'' length specified in the C standard. Modern compilers
-+generally allow string constants which are much longer than the
-+standard's minimum limit, but very portable programs should avoid
-+using longer strings.
-+
-+The limit applies @emph{after} string constant concatenation, and does
-+not count the trailing NUL@. In C89, the limit was 509 characters; in
-+C99, it was raised to 4095. C++98 does not specify a normative
-+minimum maximum, so we do not diagnose overlength strings in C++@.
-+
-+This option is implied by @option{-pedantic}, and can be disabled with
-+@option{-Wno-overlength-strings}.
-+@end table
-+
-+@node Debugging Options
-+@section Options for Debugging Your Program or GCC
-+@cindex options, debugging
-+@cindex debugging information options
-+
-+GCC has various special options that are used for debugging
-+either your program or GCC:
-+
-+@table @gcctabopt
-+@item -g
-+@opindex g
-+Produce debugging information in the operating system's native format
-+(stabs, COFF, XCOFF, or DWARF 2)@. GDB can work with this debugging
-+information.
-+
-+On most systems that use stabs format, @option{-g} enables use of extra
-+debugging information that only GDB can use; this extra information
-+makes debugging work better in GDB but will probably make other debuggers
-+crash or
-+refuse to read the program. If you want to control for certain whether
-+to generate the extra information, use @option{-gstabs+}, @option{-gstabs},
-+@option{-gxcoff+}, @option{-gxcoff}, or @option{-gvms} (see below).
-+
-+GCC allows you to use @option{-g} with
-+@option{-O}. The shortcuts taken by optimized code may occasionally
-+produce surprising results: some variables you declared may not exist
-+at all; flow of control may briefly move where you did not expect it;
-+some statements may not be executed because they compute constant
-+results or their values were already at hand; some statements may
-+execute in different places because they were moved out of loops.
-+
-+Nevertheless it proves possible to debug optimized output. This makes
-+it reasonable to use the optimizer for programs that might have bugs.
-+
-+The following options are useful when GCC is generated with the
-+capability for more than one debugging format.
-+
-+@item -ggdb
-+@opindex ggdb
-+Produce debugging information for use by GDB@. This means to use the
-+most expressive format available (DWARF 2, stabs, or the native format
-+if neither of those are supported), including GDB extensions if at all
-+possible.
-+
-+@item -gstabs
-+@opindex gstabs
-+Produce debugging information in stabs format (if that is supported),
-+without GDB extensions. This is the format used by DBX on most BSD
-+systems. On MIPS, Alpha and System V Release 4 systems this option
-+produces stabs debugging output which is not understood by DBX or SDB@.
-+On System V Release 4 systems this option requires the GNU assembler.
-+
-+@item -feliminate-unused-debug-symbols
-+@opindex feliminate-unused-debug-symbols
-+Produce debugging information in stabs format (if that is supported),
-+for only symbols that are actually used.
-+
-+@item -femit-class-debug-always
-+Instead of emitting debugging information for a C++ class in only one
-+object file, emit it in all object files using the class. This option
-+should be used only with debuggers that are unable to handle the way GCC
-+normally emits debugging information for classes because using this
-+option will increase the size of debugging information by as much as a
-+factor of two.
-+
-+@item -gstabs+
-+@opindex gstabs+
-+Produce debugging information in stabs format (if that is supported),
-+using GNU extensions understood only by the GNU debugger (GDB)@. The
-+use of these extensions is likely to make other debuggers crash or
-+refuse to read the program.
-+
-+@item -gcoff
-+@opindex gcoff
-+Produce debugging information in COFF format (if that is supported).
-+This is the format used by SDB on most System V systems prior to
-+System V Release 4.
-+
-+@item -gxcoff
-+@opindex gxcoff
-+Produce debugging information in XCOFF format (if that is supported).
-+This is the format used by the DBX debugger on IBM RS/6000 systems.
-+
-+@item -gxcoff+
-+@opindex gxcoff+
-+Produce debugging information in XCOFF format (if that is supported),
-+using GNU extensions understood only by the GNU debugger (GDB)@. The
-+use of these extensions is likely to make other debuggers crash or
-+refuse to read the program, and may cause assemblers other than the GNU
-+assembler (GAS) to fail with an error.
-+
-+@item -gdwarf-2
-+@opindex gdwarf-2
-+Produce debugging information in DWARF version 2 format (if that is
-+supported). This is the format used by DBX on IRIX 6. With this
-+option, GCC uses features of DWARF version 3 when they are useful;
-+version 3 is upward compatible with version 2, but may still cause
-+problems for older debuggers.
-+
-+@item -gvms
-+@opindex gvms
-+Produce debugging information in VMS debug format (if that is
-+supported). This is the format used by DEBUG on VMS systems.
-+
-+@item -g@var{level}
-+@itemx -ggdb@var{level}
-+@itemx -gstabs@var{level}
-+@itemx -gcoff@var{level}
-+@itemx -gxcoff@var{level}
-+@itemx -gvms@var{level}
-+Request debugging information and also use @var{level} to specify how
-+much information. The default level is 2.
-+
-+Level 0 produces no debug information at all. Thus, @option{-g0} negates
-+@option{-g}.
-+
-+Level 1 produces minimal information, enough for making backtraces in
-+parts of the program that you don't plan to debug. This includes
-+descriptions of functions and external variables, but no information
-+about local variables and no line numbers.
-+
-+Level 3 includes extra information, such as all the macro definitions
-+present in the program. Some debuggers support macro expansion when
-+you use @option{-g3}.
-+
-+@option{-gdwarf-2} does not accept a concatenated debug level, because
-+GCC used to support an option @option{-gdwarf} that meant to generate
-+debug information in version 1 of the DWARF format (which is very
-+different from version 2), and it would have been too confusing. That
-+debug format is long obsolete, but the option cannot be changed now.
-+Instead use an additional @option{-g@var{level}} option to change the
-+debug level for DWARF2.
-+
-+@item -feliminate-dwarf2-dups
-+@opindex feliminate-dwarf2-dups
-+Compress DWARF2 debugging information by eliminating duplicated
-+information about each symbol. This option only makes sense when
-+generating DWARF2 debugging information with @option{-gdwarf-2}.
-+
-+@item -femit-struct-debug-baseonly
-+Emit debug information for struct-like types
-+only when the base name of the compilation source file
-+matches the base name of file in which the struct was defined.
-+
-+This option substantially reduces the size of debugging information,
-+but at significant potential loss in type information to the debugger.
-+See @option{-femit-struct-debug-reduced} for a less aggressive option.
-+See @option{-femit-struct-debug-detailed} for more detailed control.
-+
-+This option works only with DWARF 2.
-+
-+@item -femit-struct-debug-reduced
-+Emit debug information for struct-like types
-+only when the base name of the compilation source file
-+matches the base name of file in which the type was defined,
-+unless the struct is a template or defined in a system header.
-+
-+This option significantly reduces the size of debugging information,
-+with some potential loss in type information to the debugger.
-+See @option{-femit-struct-debug-baseonly} for a more aggressive option.
-+See @option{-femit-struct-debug-detailed} for more detailed control.
-+
-+This option works only with DWARF 2.
-+
-+@item -femit-struct-debug-detailed@r{[}=@var{spec-list}@r{]}
-+Specify the struct-like types
-+for which the compiler will generate debug information.
-+The intent is to reduce duplicate struct debug information
-+between different object files within the same program.
-+
-+This option is a detailed version of
-+@option{-femit-struct-debug-reduced} and @option{-femit-struct-debug-baseonly},
-+which will serve for most needs.
-+
-+A specification has the syntax
-+[@samp{dir:}|@samp{ind:}][@samp{ord:}|@samp{gen:}](@samp{any}|@samp{sys}|@samp{base}|@samp{none})
-+
-+The optional first word limits the specification to
-+structs that are used directly (@samp{dir:}) or used indirectly (@samp{ind:}).
-+A struct type is used directly when it is the type of a variable, member.
-+Indirect uses arise through pointers to structs.
-+That is, when use of an incomplete struct would be legal, the use is indirect.
-+An example is
-+@samp{struct one direct; struct two * indirect;}.
-+
-+The optional second word limits the specification to
-+ordinary structs (@samp{ord:}) or generic structs (@samp{gen:}).
-+Generic structs are a bit complicated to explain.
-+For C++, these are non-explicit specializations of template classes,
-+or non-template classes within the above.
-+Other programming languages have generics,
-+but @samp{-femit-struct-debug-detailed} does not yet implement them.
-+
-+The third word specifies the source files for those
-+structs for which the compiler will emit debug information.
-+The values @samp{none} and @samp{any} have the normal meaning.
-+The value @samp{base} means that
-+the base of name of the file in which the type declaration appears
-+must match the base of the name of the main compilation file.
-+In practice, this means that
-+types declared in @file{foo.c} and @file{foo.h} will have debug information,
-+but types declared in other header will not.
-+The value @samp{sys} means those types satisfying @samp{base}
-+or declared in system or compiler headers.
-+
-+You may need to experiment to determine the best settings for your application.
-+
-+The default is @samp{-femit-struct-debug-detailed=all}.
-+
-+This option works only with DWARF 2.
-+
-+@item -fno-merge-debug-strings
-+@opindex fmerge-debug-strings
-+@opindex fno-merge-debug-strings
-+Direct the linker to not merge together strings in the debugging
-+information which are identical in different object files. Merging is
-+not supported by all assemblers or linkers. Merging decreases the size
-+of the debug information in the output file at the cost of increasing
-+link processing time. Merging is enabled by default.
-+
-+@item -fdebug-prefix-map=@var{old}=@var{new}
-+@opindex fdebug-prefix-map
-+When compiling files in directory @file{@var{old}}, record debugging
-+information describing them as in @file{@var{new}} instead.
-+
-+@item -fno-dwarf2-cfi-asm
-+@opindex fdwarf2-cfi-asm
-+@opindex fno-dwarf2-cfi-asm
-+Emit DWARF 2 unwind info as compiler generated @code{.eh_frame} section
-+instead of using GAS @code{.cfi_*} directives.
-+
-+@cindex @command{prof}
-+@item -p
-+@opindex p
-+Generate extra code to write profile information suitable for the
-+analysis program @command{prof}. You must use this option when compiling
-+the source files you want data about, and you must also use it when
-+linking.
-+
-+@cindex @command{gprof}
-+@item -pg
-+@opindex pg
-+Generate extra code to write profile information suitable for the
-+analysis program @command{gprof}. You must use this option when compiling
-+the source files you want data about, and you must also use it when
-+linking.
-+
-+@item -Q
-+@opindex Q
-+Makes the compiler print out each function name as it is compiled, and
-+print some statistics about each pass when it finishes.
-+
-+@item -ftime-report
-+@opindex ftime-report
-+Makes the compiler print some statistics about the time consumed by each
-+pass when it finishes.
-+
-+@item -fmem-report
-+@opindex fmem-report
-+Makes the compiler print some statistics about permanent memory
-+allocation when it finishes.
-+
-+@item -fpre-ipa-mem-report
-+@opindex fpre-ipa-mem-report
-+@item -fpost-ipa-mem-report
-+@opindex fpost-ipa-mem-report
-+Makes the compiler print some statistics about permanent memory
-+allocation before or after interprocedural optimization.
-+
-+@item -fprofile-arcs
-+@opindex fprofile-arcs
-+Add code so that program flow @dfn{arcs} are instrumented. During
-+execution the program records how many times each branch and call is
-+executed and how many times it is taken or returns. When the compiled
-+program exits it saves this data to a file called
-+@file{@var{auxname}.gcda} for each source file. The data may be used for
-+profile-directed optimizations (@option{-fbranch-probabilities}), or for
-+test coverage analysis (@option{-ftest-coverage}). Each object file's
-+@var{auxname} is generated from the name of the output file, if
-+explicitly specified and it is not the final executable, otherwise it is
-+the basename of the source file. In both cases any suffix is removed
-+(e.g.@: @file{foo.gcda} for input file @file{dir/foo.c}, or
-+@file{dir/foo.gcda} for output file specified as @option{-o dir/foo.o}).
-+@xref{Cross-profiling}.
-+
-+@cindex @command{gcov}
-+@item --coverage
-+@opindex coverage
-+
-+This option is used to compile and link code instrumented for coverage
-+analysis. The option is a synonym for @option{-fprofile-arcs}
-+@option{-ftest-coverage} (when compiling) and @option{-lgcov} (when
-+linking). See the documentation for those options for more details.
-+
-+@itemize
-+
-+@item
-+Compile the source files with @option{-fprofile-arcs} plus optimization
-+and code generation options. For test coverage analysis, use the
-+additional @option{-ftest-coverage} option. You do not need to profile
-+every source file in a program.
-+
-+@item
-+Link your object files with @option{-lgcov} or @option{-fprofile-arcs}
-+(the latter implies the former).
-+
-+@item
-+Run the program on a representative workload to generate the arc profile
-+information. This may be repeated any number of times. You can run
-+concurrent instances of your program, and provided that the file system
-+supports locking, the data files will be correctly updated. Also
-+@code{fork} calls are detected and correctly handled (double counting
-+will not happen).
-+
-+@item
-+For profile-directed optimizations, compile the source files again with
-+the same optimization and code generation options plus
-+@option{-fbranch-probabilities} (@pxref{Optimize Options,,Options that
-+Control Optimization}).
-+
-+@item
-+For test coverage analysis, use @command{gcov} to produce human readable
-+information from the @file{.gcno} and @file{.gcda} files. Refer to the
-+@command{gcov} documentation for further information.
-+
-+@end itemize
-+
-+With @option{-fprofile-arcs}, for each function of your program GCC
-+creates a program flow graph, then finds a spanning tree for the graph.
-+Only arcs that are not on the spanning tree have to be instrumented: the
-+compiler adds code to count the number of times that these arcs are
-+executed. When an arc is the only exit or only entrance to a block, the
-+instrumentation code can be added to the block; otherwise, a new basic
-+block must be created to hold the instrumentation code.
-+
-+@need 2000
-+@item -ftest-coverage
-+@opindex ftest-coverage
-+Produce a notes file that the @command{gcov} code-coverage utility
-+(@pxref{Gcov,, @command{gcov}---a Test Coverage Program}) can use to
-+show program coverage. Each source file's note file is called
-+@file{@var{auxname}.gcno}. Refer to the @option{-fprofile-arcs} option
-+above for a description of @var{auxname} and instructions on how to
-+generate test coverage data. Coverage data will match the source files
-+more closely, if you do not optimize.
-+
-+@item -fdbg-cnt-list
-+@opindex fdbg-cnt-list
-+Print the name and the counter upperbound for all debug counters.
-+
-+@item -fdbg-cnt=@var{counter-value-list}
-+@opindex fdbg-cnt
-+Set the internal debug counter upperbound. @var{counter-value-list}
-+is a comma-separated list of @var{name}:@var{value} pairs
-+which sets the upperbound of each debug counter @var{name} to @var{value}.
-+All debug counters have the initial upperbound of @var{UINT_MAX},
-+thus dbg_cnt() returns true always unless the upperbound is set by this option.
-+e.g. With -fdbg-cnt=dce:10,tail_call:0
-+dbg_cnt(dce) will return true only for first 10 invocations
-+and dbg_cnt(tail_call) will return false always.
-+
-+@item -d@var{letters}
-+@itemx -fdump-rtl-@var{pass}
-+@opindex d
-+Says to make debugging dumps during compilation at times specified by
-+@var{letters}. This is used for debugging the RTL-based passes of the
-+compiler. The file names for most of the dumps are made by appending a
-+pass number and a word to the @var{dumpname}. @var{dumpname} is generated
-+from the name of the output file, if explicitly specified and it is not
-+an executable, otherwise it is the basename of the source file. These
-+switches may have different effects when @option{-E} is used for
-+preprocessing.
-+
-+Debug dumps can be enabled with a @option{-fdump-rtl} switch or some
-+@option{-d} option @var{letters}. Here are the possible
-+letters for use in @var{pass} and @var{letters}, and their meanings:
-+
-+@table @gcctabopt
-+
-+@item -fdump-rtl-alignments
-+@opindex fdump-rtl-alignments
-+Dump after branch alignments have been computed.
-+
-+@item -fdump-rtl-asmcons
-+@opindex fdump-rtl-asmcons
-+Dump after fixing rtl statements that have unsatisfied in/out constraints.
-+
-+@item -fdump-rtl-auto_inc_dec
-+@opindex fdump-rtl-auto_inc_dec
-+Dump after auto-inc-dec discovery. This pass is only run on
-+architectures that have auto inc or auto dec instructions.
-+
-+@item -fdump-rtl-barriers
-+@opindex fdump-rtl-barriers
-+Dump after cleaning up the barrier instructions.
-+
-+@item -fdump-rtl-bbpart
-+@opindex fdump-rtl-bbpart
-+Dump after partitioning hot and cold basic blocks.
-+
-+@item -fdump-rtl-bbro
-+@opindex fdump-rtl-bbro
-+Dump after block reordering.
-+
-+@item -fdump-rtl-btl1
-+@itemx -fdump-rtl-btl2
-+@opindex fdump-rtl-btl2
-+@opindex fdump-rtl-btl2
-+@option{-fdump-rtl-btl1} and @option{-fdump-rtl-btl2} enable dumping
-+after the two branch
-+target load optimization passes.
-+
-+@item -fdump-rtl-bypass
-+@opindex fdump-rtl-bypass
-+Dump after jump bypassing and control flow optimizations.
-+
-+@item -fdump-rtl-combine
-+@opindex fdump-rtl-combine
-+Dump after the RTL instruction combination pass.
-+
-+@item -fdump-rtl-compgotos
-+@opindex fdump-rtl-compgotos
-+Dump after duplicating the computed gotos.
-+
-+@item -fdump-rtl-ce1
-+@itemx -fdump-rtl-ce2
-+@itemx -fdump-rtl-ce3
-+@opindex fdump-rtl-ce1
-+@opindex fdump-rtl-ce2
-+@opindex fdump-rtl-ce3
-+@option{-fdump-rtl-ce1}, @option{-fdump-rtl-ce2}, and
-+@option{-fdump-rtl-ce3} enable dumping after the three
-+if conversion passes.
-+
-+@itemx -fdump-rtl-cprop_hardreg
-+@opindex fdump-rtl-cprop_hardreg
-+Dump after hard register copy propagation.
-+
-+@itemx -fdump-rtl-csa
-+@opindex fdump-rtl-csa
-+Dump after combining stack adjustments.
-+
-+@item -fdump-rtl-cse1
-+@itemx -fdump-rtl-cse2
-+@opindex fdump-rtl-cse1
-+@opindex fdump-rtl-cse2
-+@option{-fdump-rtl-cse1} and @option{-fdump-rtl-cse2} enable dumping after
-+the two common sub-expression elimination passes.
-+
-+@itemx -fdump-rtl-dce
-+@opindex fdump-rtl-dce
-+Dump after the standalone dead code elimination passes.
-+
-+@itemx -fdump-rtl-dbr
-+@opindex fdump-rtl-dbr
-+Dump after delayed branch scheduling.
-+
-+@item -fdump-rtl-dce1
-+@itemx -fdump-rtl-dce2
-+@opindex fdump-rtl-dce1
-+@opindex fdump-rtl-dce2
-+@option{-fdump-rtl-dce1} and @option{-fdump-rtl-dce2} enable dumping after
-+the two dead store elimination passes.
-+
-+@item -fdump-rtl-eh
-+@opindex fdump-rtl-eh
-+Dump after finalization of EH handling code.
-+
-+@item -fdump-rtl-eh_ranges
-+@opindex fdump-rtl-eh_ranges
-+Dump after conversion of EH handling range regions.
-+
-+@item -fdump-rtl-expand
-+@opindex fdump-rtl-expand
-+Dump after RTL generation.
-+
-+@item -fdump-rtl-fwprop1
-+@itemx -fdump-rtl-fwprop2
-+@opindex fdump-rtl-fwprop1
-+@opindex fdump-rtl-fwprop2
-+@option{-fdump-rtl-fwprop1} and @option{-fdump-rtl-fwprop2} enable
-+dumping after the two forward propagation passes.
-+
-+@item -fdump-rtl-gcse1
-+@itemx -fdump-rtl-gcse2
-+@opindex fdump-rtl-gcse1
-+@opindex fdump-rtl-gcse2
-+@option{-fdump-rtl-gcse1} and @option{-fdump-rtl-gcse2} enable dumping
-+after global common subexpression elimination.
-+
-+@item -fdump-rtl-init-regs
-+@opindex fdump-rtl-init-regs
-+Dump after the initialization of the registers.
-+
-+@item -fdump-rtl-initvals
-+@opindex fdump-rtl-initvals
-+Dump after the computation of the initial value sets.
-+
-+@itemx -fdump-rtl-into_cfglayout
-+@opindex fdump-rtl-into_cfglayout
-+Dump after converting to cfglayout mode.
-+
-+@item -fdump-rtl-ira
-+@opindex fdump-rtl-ira
-+Dump after iterated register allocation.
-+
-+@item -fdump-rtl-jump
-+@opindex fdump-rtl-jump
-+Dump after the second jump optimization.
-+
-+@item -fdump-rtl-loop2
-+@opindex fdump-rtl-loop2
-+@option{-fdump-rtl-loop2} enables dumping after the rtl
-+loop optimization passes.
-+
-+@item -fdump-rtl-mach
-+@opindex fdump-rtl-mach
-+Dump after performing the machine dependent reorganization pass, if that
-+pass exists.
-+
-+@item -fdump-rtl-mode_sw
-+@opindex fdump-rtl-mode_sw
-+Dump after removing redundant mode switches.
-+
-+@item -fdump-rtl-rnreg
-+@opindex fdump-rtl-rnreg
-+Dump after register renumbering.
-+
-+@itemx -fdump-rtl-outof_cfglayout
-+@opindex fdump-rtl-outof_cfglayout
-+Dump after converting from cfglayout mode.
-+
-+@item -fdump-rtl-peephole2
-+@opindex fdump-rtl-peephole2
-+Dump after the peephole pass.
-+
-+@item -fdump-rtl-postreload
-+@opindex fdump-rtl-postreload
-+Dump after post-reload optimizations.
-+
-+@itemx -fdump-rtl-pro_and_epilogue
-+@opindex fdump-rtl-pro_and_epilogue
-+Dump after generating the function pro and epilogues.
-+
-+@item -fdump-rtl-regmove
-+@opindex fdump-rtl-regmove
-+Dump after the register move pass.
-+
-+@item -fdump-rtl-sched1
-+@itemx -fdump-rtl-sched2
-+@opindex fdump-rtl-sched1
-+@opindex fdump-rtl-sched2
-+@option{-fdump-rtl-sched1} and @option{-fdump-rtl-sched2} enable dumping
-+after the basic block scheduling passes.
-+
-+@item -fdump-rtl-see
-+@opindex fdump-rtl-see
-+Dump after sign extension elimination.
-+
-+@item -fdump-rtl-seqabstr
-+@opindex fdump-rtl-seqabstr
-+Dump after common sequence discovery.
-+
-+@item -fdump-rtl-shorten
-+@opindex fdump-rtl-shorten
-+Dump after shortening branches.
-+
-+@item -fdump-rtl-sibling
-+@opindex fdump-rtl-sibling
-+Dump after sibling call optimizations.
-+
-+@item -fdump-rtl-split1
-+@itemx -fdump-rtl-split2
-+@itemx -fdump-rtl-split3
-+@itemx -fdump-rtl-split4
-+@itemx -fdump-rtl-split5
-+@opindex fdump-rtl-split1
-+@opindex fdump-rtl-split2
-+@opindex fdump-rtl-split3
-+@opindex fdump-rtl-split4
-+@opindex fdump-rtl-split5
-+@option{-fdump-rtl-split1}, @option{-fdump-rtl-split2},
-+@option{-fdump-rtl-split3}, @option{-fdump-rtl-split4} and
-+@option{-fdump-rtl-split5} enable dumping after five rounds of
-+instruction splitting.
-+
-+@item -fdump-rtl-sms
-+@opindex fdump-rtl-sms
-+Dump after modulo scheduling. This pass is only run on some
-+architectures.
-+
-+@item -fdump-rtl-stack
-+@opindex fdump-rtl-stack
-+Dump after conversion from GCC's "flat register file" registers to the
-+x87's stack-like registers. This pass is only run on x86 variants.
-+
-+@item -fdump-rtl-subreg1
-+@itemx -fdump-rtl-subreg2
-+@opindex fdump-rtl-subreg1
-+@opindex fdump-rtl-subreg2
-+@option{-fdump-rtl-subreg1} and @option{-fdump-rtl-subreg2} enable dumping after
-+the two subreg expansion passes.
-+
-+@item -fdump-rtl-unshare
-+@opindex fdump-rtl-unshare
-+Dump after all rtl has been unshared.
-+
-+@item -fdump-rtl-vartrack
-+@opindex fdump-rtl-vartrack
-+Dump after variable tracking.
-+
-+@item -fdump-rtl-vregs
-+@opindex fdump-rtl-vregs
-+Dump after converting virtual registers to hard registers.
-+
-+@item -fdump-rtl-web
-+@opindex fdump-rtl-web
-+Dump after live range splitting.
-+
-+@item -fdump-rtl-regclass
-+@itemx -fdump-rtl-subregs_of_mode_init
-+@itemx -fdump-rtl-subregs_of_mode_finish
-+@itemx -fdump-rtl-dfinit
-+@itemx -fdump-rtl-dfinish
-+@opindex fdump-rtl-regclass
-+@opindex fdump-rtl-subregs_of_mode_init
-+@opindex fdump-rtl-subregs_of_mode_finish
-+@opindex fdump-rtl-dfinit
-+@opindex fdump-rtl-dfinish
-+These dumps are defined but always produce empty files.
-+
-+@item -fdump-rtl-all
-+@opindex fdump-rtl-all
-+Produce all the dumps listed above.
-+
-+@item -dA
-+@opindex dA
-+Annotate the assembler output with miscellaneous debugging information.
-+
-+@item -dD
-+@opindex dD
-+Dump all macro definitions, at the end of preprocessing, in addition to
-+normal output.
-+
-+@item -dH
-+@opindex dH
-+Produce a core dump whenever an error occurs.
-+
-+@item -dm
-+@opindex dm
-+Print statistics on memory usage, at the end of the run, to
-+standard error.
-+
-+@item -dp
-+@opindex dp
-+Annotate the assembler output with a comment indicating which
-+pattern and alternative was used. The length of each instruction is
-+also printed.
-+
-+@item -dP
-+@opindex dP
-+Dump the RTL in the assembler output as a comment before each instruction.
-+Also turns on @option{-dp} annotation.
-+
-+@item -dv
-+@opindex dv
-+For each of the other indicated dump files (@option{-fdump-rtl-@var{pass}}),
-+dump a representation of the control flow graph suitable for viewing with VCG
-+to @file{@var{file}.@var{pass}.vcg}.
-+
-+@item -dx
-+@opindex dx
-+Just generate RTL for a function instead of compiling it. Usually used
-+with @option{-fdump-rtl-expand}.
-+
-+@item -dy
-+@opindex dy
-+Dump debugging information during parsing, to standard error.
-+@end table
-+
-+@item -fdump-noaddr
-+@opindex fdump-noaddr
-+When doing debugging dumps, suppress address output. This makes it more
-+feasible to use diff on debugging dumps for compiler invocations with
-+different compiler binaries and/or different
-+text / bss / data / heap / stack / dso start locations.
-+
-+@item -fdump-unnumbered
-+@opindex fdump-unnumbered
-+When doing debugging dumps, suppress instruction numbers and address output.
-+This makes it more feasible to use diff on debugging dumps for compiler
-+invocations with different options, in particular with and without
-+@option{-g}.
-+
-+@item -fdump-translation-unit @r{(C++ only)}
-+@itemx -fdump-translation-unit-@var{options} @r{(C++ only)}
-+@opindex fdump-translation-unit
-+Dump a representation of the tree structure for the entire translation
-+unit to a file. The file name is made by appending @file{.tu} to the
-+source file name. If the @samp{-@var{options}} form is used, @var{options}
-+controls the details of the dump as described for the
-+@option{-fdump-tree} options.
-+
-+@item -fdump-class-hierarchy @r{(C++ only)}
-+@itemx -fdump-class-hierarchy-@var{options} @r{(C++ only)}
-+@opindex fdump-class-hierarchy
-+Dump a representation of each class's hierarchy and virtual function
-+table layout to a file. The file name is made by appending @file{.class}
-+to the source file name. If the @samp{-@var{options}} form is used,
-+@var{options} controls the details of the dump as described for the
-+@option{-fdump-tree} options.
-+
-+@item -fdump-ipa-@var{switch}
-+@opindex fdump-ipa
-+Control the dumping at various stages of inter-procedural analysis
-+language tree to a file. The file name is generated by appending a switch
-+specific suffix to the source file name. The following dumps are possible:
-+
-+@table @samp
-+@item all
-+Enables all inter-procedural analysis dumps.
-+
-+@item cgraph
-+Dumps information about call-graph optimization, unused function removal,
-+and inlining decisions.
-+
-+@item inline
-+Dump after function inlining.
-+
-+@end table
-+
-+@item -fdump-statistics-@var{option}
-+@opindex -fdump-statistics
-+Enable and control dumping of pass statistics in a separate file. The
-+file name is generated by appending a suffix ending in @samp{.statistics}
-+to the source file name. If the @samp{-@var{option}} form is used,
-+@samp{-stats} will cause counters to be summed over the whole compilation unit
-+while @samp{-details} will dump every event as the passes generate them.
-+The default with no option is to sum counters for each function compiled.
-+
-+@item -fdump-tree-@var{switch}
-+@itemx -fdump-tree-@var{switch}-@var{options}
-+@opindex fdump-tree
-+Control the dumping at various stages of processing the intermediate
-+language tree to a file. The file name is generated by appending a switch
-+specific suffix to the source file name. If the @samp{-@var{options}}
-+form is used, @var{options} is a list of @samp{-} separated options that
-+control the details of the dump. Not all options are applicable to all
-+dumps, those which are not meaningful will be ignored. The following
-+options are available
-+
-+@table @samp
-+@item address
-+Print the address of each node. Usually this is not meaningful as it
-+changes according to the environment and source file. Its primary use
-+is for tying up a dump file with a debug environment.
-+@item slim
-+Inhibit dumping of members of a scope or body of a function merely
-+because that scope has been reached. Only dump such items when they
-+are directly reachable by some other path. When dumping pretty-printed
-+trees, this option inhibits dumping the bodies of control structures.
-+@item raw
-+Print a raw representation of the tree. By default, trees are
-+pretty-printed into a C-like representation.
-+@item details
-+Enable more detailed dumps (not honored by every dump option).
-+@item stats
-+Enable dumping various statistics about the pass (not honored by every dump
-+option).
-+@item blocks
-+Enable showing basic block boundaries (disabled in raw dumps).
-+@item vops
-+Enable showing virtual operands for every statement.
-+@item lineno
-+Enable showing line numbers for statements.
-+@item uid
-+Enable showing the unique ID (@code{DECL_UID}) for each variable.
-+@item verbose
-+Enable showing the tree dump for each statement.
-+@item all
-+Turn on all options, except @option{raw}, @option{slim}, @option{verbose}
-+and @option{lineno}.
-+@end table
-+
-+The following tree dumps are possible:
-+@table @samp
-+
-+@item original
-+Dump before any tree based optimization, to @file{@var{file}.original}.
-+
-+@item optimized
-+Dump after all tree based optimization, to @file{@var{file}.optimized}.
-+
-+@item gimple
-+@opindex fdump-tree-gimple
-+Dump each function before and after the gimplification pass to a file. The
-+file name is made by appending @file{.gimple} to the source file name.
-+
-+@item cfg
-+@opindex fdump-tree-cfg
-+Dump the control flow graph of each function to a file. The file name is
-+made by appending @file{.cfg} to the source file name.
-+
-+@item vcg
-+@opindex fdump-tree-vcg
-+Dump the control flow graph of each function to a file in VCG format. The
-+file name is made by appending @file{.vcg} to the source file name. Note
-+that if the file contains more than one function, the generated file cannot
-+be used directly by VCG@. You will need to cut and paste each function's
-+graph into its own separate file first.
-+
-+@item ch
-+@opindex fdump-tree-ch
-+Dump each function after copying loop headers. The file name is made by
-+appending @file{.ch} to the source file name.
-+
-+@item ssa
-+@opindex fdump-tree-ssa
-+Dump SSA related information to a file. The file name is made by appending
-+@file{.ssa} to the source file name.
-+
-+@item alias
-+@opindex fdump-tree-alias
-+Dump aliasing information for each function. The file name is made by
-+appending @file{.alias} to the source file name.
-+
-+@item ccp
-+@opindex fdump-tree-ccp
-+Dump each function after CCP@. The file name is made by appending
-+@file{.ccp} to the source file name.
-+
-+@item storeccp
-+@opindex fdump-tree-storeccp
-+Dump each function after STORE-CCP@. The file name is made by appending
-+@file{.storeccp} to the source file name.
-+
-+@item pre
-+@opindex fdump-tree-pre
-+Dump trees after partial redundancy elimination. The file name is made
-+by appending @file{.pre} to the source file name.
-+
-+@item fre
-+@opindex fdump-tree-fre
-+Dump trees after full redundancy elimination. The file name is made
-+by appending @file{.fre} to the source file name.
-+
-+@item copyprop
-+@opindex fdump-tree-copyprop
-+Dump trees after copy propagation. The file name is made
-+by appending @file{.copyprop} to the source file name.
-+
-+@item store_copyprop
-+@opindex fdump-tree-store_copyprop
-+Dump trees after store copy-propagation. The file name is made
-+by appending @file{.store_copyprop} to the source file name.
-+
-+@item dce
-+@opindex fdump-tree-dce
-+Dump each function after dead code elimination. The file name is made by
-+appending @file{.dce} to the source file name.
-+
-+@item mudflap
-+@opindex fdump-tree-mudflap
-+Dump each function after adding mudflap instrumentation. The file name is
-+made by appending @file{.mudflap} to the source file name.
-+
-+@item sra
-+@opindex fdump-tree-sra
-+Dump each function after performing scalar replacement of aggregates. The
-+file name is made by appending @file{.sra} to the source file name.
-+
-+@item sink
-+@opindex fdump-tree-sink
-+Dump each function after performing code sinking. The file name is made
-+by appending @file{.sink} to the source file name.
-+
-+@item dom
-+@opindex fdump-tree-dom
-+Dump each function after applying dominator tree optimizations. The file
-+name is made by appending @file{.dom} to the source file name.
-+
-+@item dse
-+@opindex fdump-tree-dse
-+Dump each function after applying dead store elimination. The file
-+name is made by appending @file{.dse} to the source file name.
-+
-+@item phiopt
-+@opindex fdump-tree-phiopt
-+Dump each function after optimizing PHI nodes into straightline code. The file
-+name is made by appending @file{.phiopt} to the source file name.
-+
-+@item forwprop
-+@opindex fdump-tree-forwprop
-+Dump each function after forward propagating single use variables. The file
-+name is made by appending @file{.forwprop} to the source file name.
-+
-+@item copyrename
-+@opindex fdump-tree-copyrename
-+Dump each function after applying the copy rename optimization. The file
-+name is made by appending @file{.copyrename} to the source file name.
-+
-+@item nrv
-+@opindex fdump-tree-nrv
-+Dump each function after applying the named return value optimization on
-+generic trees. The file name is made by appending @file{.nrv} to the source
-+file name.
-+
-+@item vect
-+@opindex fdump-tree-vect
-+Dump each function after applying vectorization of loops. The file name is
-+made by appending @file{.vect} to the source file name.
-+
-+@item vrp
-+@opindex fdump-tree-vrp
-+Dump each function after Value Range Propagation (VRP). The file name
-+is made by appending @file{.vrp} to the source file name.
-+
-+@item all
-+@opindex fdump-tree-all
-+Enable all the available tree dumps with the flags provided in this option.
-+@end table
-+
-+@item -ftree-vectorizer-verbose=@var{n}
-+@opindex ftree-vectorizer-verbose
-+This option controls the amount of debugging output the vectorizer prints.
-+This information is written to standard error, unless
-+@option{-fdump-tree-all} or @option{-fdump-tree-vect} is specified,
-+in which case it is output to the usual dump listing file, @file{.vect}.
-+For @var{n}=0 no diagnostic information is reported.
-+If @var{n}=1 the vectorizer reports each loop that got vectorized,
-+and the total number of loops that got vectorized.
-+If @var{n}=2 the vectorizer also reports non-vectorized loops that passed
-+the first analysis phase (vect_analyze_loop_form) - i.e.@: countable,
-+inner-most, single-bb, single-entry/exit loops. This is the same verbosity
-+level that @option{-fdump-tree-vect-stats} uses.
-+Higher verbosity levels mean either more information dumped for each
-+reported loop, or same amount of information reported for more loops:
-+If @var{n}=3, alignment related information is added to the reports.
-+If @var{n}=4, data-references related information (e.g.@: memory dependences,
-+memory access-patterns) is added to the reports.
-+If @var{n}=5, the vectorizer reports also non-vectorized inner-most loops
-+that did not pass the first analysis phase (i.e., may not be countable, or
-+may have complicated control-flow).
-+If @var{n}=6, the vectorizer reports also non-vectorized nested loops.
-+For @var{n}=7, all the information the vectorizer generates during its
-+analysis and transformation is reported. This is the same verbosity level
-+that @option{-fdump-tree-vect-details} uses.
-+
-+@item -frandom-seed=@var{string}
-+@opindex frandom-string
-+This option provides a seed that GCC uses when it would otherwise use
-+random numbers. It is used to generate certain symbol names
-+that have to be different in every compiled file. It is also used to
-+place unique stamps in coverage data files and the object files that
-+produce them. You can use the @option{-frandom-seed} option to produce
-+reproducibly identical object files.
-+
-+The @var{string} should be different for every file you compile.
-+
-+@item -fsched-verbose=@var{n}
-+@opindex fsched-verbose
-+On targets that use instruction scheduling, this option controls the
-+amount of debugging output the scheduler prints. This information is
-+written to standard error, unless @option{-fdump-rtl-sched1} or
-+@option{-fdump-rtl-sched2} is specified, in which case it is output
-+to the usual dump listing file, @file{.sched} or @file{.sched2}
-+respectively. However for @var{n} greater than nine, the output is
-+always printed to standard error.
-+
-+For @var{n} greater than zero, @option{-fsched-verbose} outputs the
-+same information as @option{-fdump-rtl-sched1} and @option{-fdump-rtl-sched2}.
-+For @var{n} greater than one, it also output basic block probabilities,
-+detailed ready list information and unit/insn info. For @var{n} greater
-+than two, it includes RTL at abort point, control-flow and regions info.
-+And for @var{n} over four, @option{-fsched-verbose} also includes
-+dependence info.
-+
-+@item -save-temps
-+@opindex save-temps
-+Store the usual ``temporary'' intermediate files permanently; place them
-+in the current directory and name them based on the source file. Thus,
-+compiling @file{foo.c} with @samp{-c -save-temps} would produce files
-+@file{foo.i} and @file{foo.s}, as well as @file{foo.o}. This creates a
-+preprocessed @file{foo.i} output file even though the compiler now
-+normally uses an integrated preprocessor.
-+
-+When used in combination with the @option{-x} command line option,
-+@option{-save-temps} is sensible enough to avoid over writing an
-+input source file with the same extension as an intermediate file.
-+The corresponding intermediate file may be obtained by renaming the
-+source file before using @option{-save-temps}.
-+
-+@item -time
-+@opindex time
-+Report the CPU time taken by each subprocess in the compilation
-+sequence. For C source files, this is the compiler proper and assembler
-+(plus the linker if linking is done). The output looks like this:
-+
-+@smallexample
-+# cc1 0.12 0.01
-+# as 0.00 0.01
-+@end smallexample
-+
-+The first number on each line is the ``user time'', that is time spent
-+executing the program itself. The second number is ``system time'',
-+time spent executing operating system routines on behalf of the program.
-+Both numbers are in seconds.
-+
-+@item -fvar-tracking
-+@opindex fvar-tracking
-+Run variable tracking pass. It computes where variables are stored at each
-+position in code. Better debugging information is then generated
-+(if the debugging information format supports this information).
-+
-+It is enabled by default when compiling with optimization (@option{-Os},
-+@option{-O}, @option{-O2}, @dots{}), debugging information (@option{-g}) and
-+the debug info format supports it.
-+
-+@item -print-file-name=@var{library}
-+@opindex print-file-name
-+Print the full absolute name of the library file @var{library} that
-+would be used when linking---and don't do anything else. With this
-+option, GCC does not compile or link anything; it just prints the
-+file name.
-+
-+@item -print-multi-directory
-+@opindex print-multi-directory
-+Print the directory name corresponding to the multilib selected by any
-+other switches present in the command line. This directory is supposed
-+to exist in @env{GCC_EXEC_PREFIX}.
-+
-+@item -print-multi-lib
-+@opindex print-multi-lib
-+Print the mapping from multilib directory names to compiler switches
-+that enable them. The directory name is separated from the switches by
-+@samp{;}, and each switch starts with an @samp{@@} instead of the
-+@samp{-}, without spaces between multiple switches. This is supposed to
-+ease shell-processing.
-+
-+@item -print-prog-name=@var{program}
-+@opindex print-prog-name
-+Like @option{-print-file-name}, but searches for a program such as @samp{cpp}.
-+
-+@item -print-libgcc-file-name
-+@opindex print-libgcc-file-name
-+Same as @option{-print-file-name=libgcc.a}.
-+
-+This is useful when you use @option{-nostdlib} or @option{-nodefaultlibs}
-+but you do want to link with @file{libgcc.a}. You can do
-+
-+@smallexample
-+gcc -nostdlib @var{files}@dots{} `gcc -print-libgcc-file-name`
-+@end smallexample
-+
-+@item -print-search-dirs
-+@opindex print-search-dirs
-+Print the name of the configured installation directory and a list of
-+program and library directories @command{gcc} will search---and don't do anything else.
-+
-+This is useful when @command{gcc} prints the error message
-+@samp{installation problem, cannot exec cpp0: No such file or directory}.
-+To resolve this you either need to put @file{cpp0} and the other compiler
-+components where @command{gcc} expects to find them, or you can set the environment
-+variable @env{GCC_EXEC_PREFIX} to the directory where you installed them.
-+Don't forget the trailing @samp{/}.
-+@xref{Environment Variables}.
-+
-+@item -print-sysroot
-+@opindex print-sysroot
-+Print the target sysroot directory that will be used during
-+compilation. This is the target sysroot specified either at configure
-+time or using the @option{--sysroot} option, possibly with an extra
-+suffix that depends on compilation options. If no target sysroot is
-+specified, the option prints nothing.
-+
-+@item -print-sysroot-headers-suffix
-+@opindex print-sysroot-headers-suffix
-+Print the suffix added to the target sysroot when searching for
-+headers, or give an error if the compiler is not configured with such
-+a suffix---and don't do anything else.
-+
-+@item -dumpmachine
-+@opindex dumpmachine
-+Print the compiler's target machine (for example,
-+@samp{i686-pc-linux-gnu})---and don't do anything else.
-+
-+@item -dumpversion
-+@opindex dumpversion
-+Print the compiler version (for example, @samp{3.0})---and don't do
-+anything else.
-+
-+@item -dumpspecs
-+@opindex dumpspecs
-+Print the compiler's built-in specs---and don't do anything else. (This
-+is used when GCC itself is being built.) @xref{Spec Files}.
-+
-+@item -feliminate-unused-debug-types
-+@opindex feliminate-unused-debug-types
-+Normally, when producing DWARF2 output, GCC will emit debugging
-+information for all types declared in a compilation
-+unit, regardless of whether or not they are actually used
-+in that compilation unit. Sometimes this is useful, such as
-+if, in the debugger, you want to cast a value to a type that is
-+not actually used in your program (but is declared). More often,
-+however, this results in a significant amount of wasted space.
-+With this option, GCC will avoid producing debug symbol output
-+for types that are nowhere used in the source file being compiled.
-+@end table
-+
-+@node Optimize Options
-+@section Options That Control Optimization
-+@cindex optimize options
-+@cindex options, optimization
-+
-+These options control various sorts of optimizations.
-+
-+Without any optimization option, the compiler's goal is to reduce the
-+cost of compilation and to make debugging produce the expected
-+results. Statements are independent: if you stop the program with a
-+breakpoint between statements, you can then assign a new value to any
-+variable or change the program counter to any other statement in the
-+function and get exactly the results you would expect from the source
-+code.
-+
-+Turning on optimization flags makes the compiler attempt to improve
-+the performance and/or code size at the expense of compilation time
-+and possibly the ability to debug the program.
-+
-+The compiler performs optimization based on the knowledge it has of the
-+program. Compiling multiple files at once to a single output file mode allows
-+the compiler to use information gained from all of the files when compiling
-+each of them.
-+
-+Not all optimizations are controlled directly by a flag. Only
-+optimizations that have a flag are listed.
-+
-+@table @gcctabopt
-+@item -O
-+@itemx -O1
-+@opindex O
-+@opindex O1
-+Optimize. Optimizing compilation takes somewhat more time, and a lot
-+more memory for a large function.
-+
-+With @option{-O}, the compiler tries to reduce code size and execution
-+time, without performing any optimizations that take a great deal of
-+compilation time.
-+
-+@option{-O} turns on the following optimization flags:
-+@gccoptlist{
-+-fauto-inc-dec @gol
-+-fcprop-registers @gol
-+-fdce @gol
-+-fdefer-pop @gol
-+-fdelayed-branch @gol
-+-fdse @gol
-+-fguess-branch-probability @gol
-+-fif-conversion2 @gol
-+-fif-conversion @gol
-+-finline-small-functions @gol
-+-fipa-pure-const @gol
-+-fipa-reference @gol
-+-fmerge-constants
-+-fsplit-wide-types @gol
-+-ftree-builtin-call-dce @gol
-+-ftree-ccp @gol
-+-ftree-ch @gol
-+-ftree-copyrename @gol
-+-ftree-dce @gol
-+-ftree-dominator-opts @gol
-+-ftree-dse @gol
-+-ftree-fre @gol
-+-ftree-sra @gol
-+-ftree-ter @gol
-+-funit-at-a-time}
-+
-+@option{-O} also turns on @option{-fomit-frame-pointer} on machines
-+where doing so does not interfere with debugging.
-+
-+@item -O2
-+@opindex O2
-+Optimize even more. GCC performs nearly all supported optimizations
-+that do not involve a space-speed tradeoff.
-+As compared to @option{-O}, this option increases both compilation time
-+and the performance of the generated code.
-+
-+@option{-O2} turns on all optimization flags specified by @option{-O}. It
-+also turns on the following optimization flags:
-+@gccoptlist{-fthread-jumps @gol
-+-falign-functions -falign-jumps @gol
-+-falign-loops -falign-labels @gol
-+-fcaller-saves @gol
-+-fcrossjumping @gol
-+-fcse-follow-jumps -fcse-skip-blocks @gol
-+-fdelete-null-pointer-checks @gol
-+-fexpensive-optimizations @gol
-+-fgcse -fgcse-lm @gol
-+-findirect-inlining @gol
-+-foptimize-sibling-calls @gol
-+-fpeephole2 @gol
-+-fregmove @gol
-+-freorder-blocks -freorder-functions @gol
-+-frerun-cse-after-loop @gol
-+-fsched-interblock -fsched-spec @gol
-+-fschedule-insns -fschedule-insns2 @gol
-+-fstrict-aliasing -fstrict-overflow @gol
-+-ftree-switch-conversion @gol
-+-ftree-pre @gol
-+-ftree-vrp}
-+
-+Please note the warning under @option{-fgcse} about
-+invoking @option{-O2} on programs that use computed gotos.
-+
-+@item -O3
-+@opindex O3
-+Optimize yet more. @option{-O3} turns on all optimizations specified
-+by @option{-O2} and also turns on the @option{-finline-functions},
-+@option{-funswitch-loops}, @option{-fpredictive-commoning},
-+@option{-fgcse-after-reload}, @option{-ftree-vectorize} and
-+@option{-fipa-cp-clone} options.
-+
-+@item -O0
-+@opindex O0
-+Reduce compilation time and make debugging produce the expected
-+results. This is the default.
-+
-+@item -Os
-+@opindex Os
-+Optimize for size. @option{-Os} enables all @option{-O2} optimizations that
-+do not typically increase code size. It also performs further
-+optimizations designed to reduce code size.
-+
-+@option{-Os} disables the following optimization flags:
-+@gccoptlist{-falign-functions -falign-jumps -falign-loops @gol
-+-falign-labels -freorder-blocks -freorder-blocks-and-partition @gol
-+-fprefetch-loop-arrays -ftree-vect-loop-version}
-+
-+If you use multiple @option{-O} options, with or without level numbers,
-+the last such option is the one that is effective.
-+@end table
-+
-+Options of the form @option{-f@var{flag}} specify machine-independent
-+flags. Most flags have both positive and negative forms; the negative
-+form of @option{-ffoo} would be @option{-fno-foo}. In the table
-+below, only one of the forms is listed---the one you typically will
-+use. You can figure out the other form by either removing @samp{no-}
-+or adding it.
-+
-+The following options control specific optimizations. They are either
-+activated by @option{-O} options or are related to ones that are. You
-+can use the following flags in the rare cases when ``fine-tuning'' of
-+optimizations to be performed is desired.
-+
-+@table @gcctabopt
-+@item -fno-default-inline
-+@opindex fno-default-inline
-+Do not make member functions inline by default merely because they are
-+defined inside the class scope (C++ only). Otherwise, when you specify
-+@w{@option{-O}}, member functions defined inside class scope are compiled
-+inline by default; i.e., you don't need to add @samp{inline} in front of
-+the member function name.
-+
-+@item -fno-defer-pop
-+@opindex fno-defer-pop
-+Always pop the arguments to each function call as soon as that function
-+returns. For machines which must pop arguments after a function call,
-+the compiler normally lets arguments accumulate on the stack for several
-+function calls and pops them all at once.
-+
-+Disabled at levels @option{-O}, @option{-O2}, @option{-O3}, @option{-Os}.
-+
-+@item -fforward-propagate
-+@opindex fforward-propagate
-+Perform a forward propagation pass on RTL@. The pass tries to combine two
-+instructions and checks if the result can be simplified. If loop unrolling
-+is active, two passes are performed and the second is scheduled after
-+loop unrolling.
-+
-+This option is enabled by default at optimization levels @option{-O2},
-+@option{-O3}, @option{-Os}.
-+
-+@item -fomit-frame-pointer
-+@opindex fomit-frame-pointer
-+Don't keep the frame pointer in a register for functions that
-+don't need one. This avoids the instructions to save, set up and
-+restore frame pointers; it also makes an extra register available
-+in many functions. @strong{It also makes debugging impossible on
-+some machines.}
-+
-+On some machines, such as the VAX, this flag has no effect, because
-+the standard calling sequence automatically handles the frame pointer
-+and nothing is saved by pretending it doesn't exist. The
-+machine-description macro @code{FRAME_POINTER_REQUIRED} controls
-+whether a target machine supports this flag. @xref{Registers,,Register
-+Usage, gccint, GNU Compiler Collection (GCC) Internals}.
-+
-+Enabled at levels @option{-O}, @option{-O2}, @option{-O3}, @option{-Os}.
-+
-+@item -foptimize-sibling-calls
-+@opindex foptimize-sibling-calls
-+Optimize sibling and tail recursive calls.
-+
-+Enabled at levels @option{-O2}, @option{-O3}, @option{-Os}.
-+
-+@item -fno-inline
-+@opindex fno-inline
-+Don't pay attention to the @code{inline} keyword. Normally this option
-+is used to keep the compiler from expanding any functions inline.
-+Note that if you are not optimizing, no functions can be expanded inline.
-+
-+@item -finline-small-functions
-+@opindex finline-small-functions
-+Integrate functions into their callers when their body is smaller than expected
-+function call code (so overall size of program gets smaller). The compiler
-+heuristically decides which functions are simple enough to be worth integrating
-+in this way.
-+
-+Enabled at level @option{-O2}.
-+
-+@item -findirect-inlining
-+@opindex findirect-inlining
-+Inline also indirect calls that are discovered to be known at compile
-+time thanks to previous inlining. This option has any effect only
-+when inlining itself is turned on by the @option{-finline-functions}
-+or @option{-finline-small-functions} options.
-+
-+Enabled at level @option{-O2}.
-+
-+@item -finline-functions
-+@opindex finline-functions
-+Integrate all simple functions into their callers. The compiler
-+heuristically decides which functions are simple enough to be worth
-+integrating in this way.
-+
-+If all calls to a given function are integrated, and the function is
-+declared @code{static}, then the function is normally not output as
-+assembler code in its own right.
-+
-+Enabled at level @option{-O3}.
-+
-+@item -finline-functions-called-once
-+@opindex finline-functions-called-once
-+Consider all @code{static} functions called once for inlining into their
-+caller even if they are not marked @code{inline}. If a call to a given
-+function is integrated, then the function is not output as assembler code
-+in its own right.
-+
-+Enabled at levels @option{-O1}, @option{-O2}, @option{-O3} and @option{-Os}.
-+
-+@item -fearly-inlining
-+@opindex fearly-inlining
-+Inline functions marked by @code{always_inline} and functions whose body seems
-+smaller than the function call overhead early before doing
-+@option{-fprofile-generate} instrumentation and real inlining pass. Doing so
-+makes profiling significantly cheaper and usually inlining faster on programs
-+having large chains of nested wrapper functions.
-+
-+Enabled by default.
-+
-+@item -finline-limit=@var{n}
-+@opindex finline-limit
-+By default, GCC limits the size of functions that can be inlined. This flag
-+allows coarse control of this limit. @var{n} is the size of functions that
-+can be inlined in number of pseudo instructions.
-+
-+Inlining is actually controlled by a number of parameters, which may be
-+specified individually by using @option{--param @var{name}=@var{value}}.
-+The @option{-finline-limit=@var{n}} option sets some of these parameters
-+as follows:
-+
-+@table @gcctabopt
-+@item max-inline-insns-single
-+is set to @var{n}/2.
-+@item max-inline-insns-auto
-+is set to @var{n}/2.
-+@end table
-+
-+See below for a documentation of the individual
-+parameters controlling inlining and for the defaults of these parameters.
-+
-+@emph{Note:} there may be no value to @option{-finline-limit} that results
-+in default behavior.
-+
-+@emph{Note:} pseudo instruction represents, in this particular context, an
-+abstract measurement of function's size. In no way does it represent a count
-+of assembly instructions and as such its exact meaning might change from one
-+release to an another.
-+
-+@item -fkeep-inline-functions
-+@opindex fkeep-inline-functions
-+In C, emit @code{static} functions that are declared @code{inline}
-+into the object file, even if the function has been inlined into all
-+of its callers. This switch does not affect functions using the
-+@code{extern inline} extension in GNU C89@. In C++, emit any and all
-+inline functions into the object file.
-+
-+@item -fkeep-static-consts
-+@opindex fkeep-static-consts
-+Emit variables declared @code{static const} when optimization isn't turned
-+on, even if the variables aren't referenced.
-+
-+GCC enables this option by default. If you want to force the compiler to
-+check if the variable was referenced, regardless of whether or not
-+optimization is turned on, use the @option{-fno-keep-static-consts} option.
-+
-+@item -fmerge-constants
-+@opindex fmerge-constants
-+Attempt to merge identical constants (string constants and floating point
-+constants) across compilation units.
-+
-+This option is the default for optimized compilation if the assembler and
-+linker support it. Use @option{-fno-merge-constants} to inhibit this
-+behavior.
-+
-+Enabled at levels @option{-O}, @option{-O2}, @option{-O3}, @option{-Os}.
-+
-+@item -fmerge-all-constants
-+@opindex fmerge-all-constants
-+Attempt to merge identical constants and identical variables.
-+
-+This option implies @option{-fmerge-constants}. In addition to
-+@option{-fmerge-constants} this considers e.g.@: even constant initialized
-+arrays or initialized constant variables with integral or floating point
-+types. Languages like C or C++ require each variable, including multiple
-+instances of the same variable in recursive calls, to have distinct locations,
-+so using this option will result in non-conforming
-+behavior.
-+
-+@item -fmodulo-sched
-+@opindex fmodulo-sched
-+Perform swing modulo scheduling immediately before the first scheduling
-+pass. This pass looks at innermost loops and reorders their
-+instructions by overlapping different iterations.
-+
-+@item -fmodulo-sched-allow-regmoves
-+@opindex fmodulo-sched-allow-regmoves
-+Perform more aggressive SMS based modulo scheduling with register moves
-+allowed. By setting this flag certain anti-dependences edges will be
-+deleted which will trigger the generation of reg-moves based on the
-+life-range analysis. This option is effective only with
-+@option{-fmodulo-sched} enabled.
-+
-+@item -fno-branch-count-reg
-+@opindex fno-branch-count-reg
-+Do not use ``decrement and branch'' instructions on a count register,
-+but instead generate a sequence of instructions that decrement a
-+register, compare it against zero, then branch based upon the result.
-+This option is only meaningful on architectures that support such
-+instructions, which include x86, PowerPC, IA-64 and S/390.
-+
-+The default is @option{-fbranch-count-reg}.
-+
-+@item -fno-function-cse
-+@opindex fno-function-cse
-+Do not put function addresses in registers; make each instruction that
-+calls a constant function contain the function's address explicitly.
-+
-+This option results in less efficient code, but some strange hacks
-+that alter the assembler output may be confused by the optimizations
-+performed when this option is not used.
-+
-+The default is @option{-ffunction-cse}
-+
-+@item -fno-zero-initialized-in-bss
-+@opindex fno-zero-initialized-in-bss
-+If the target supports a BSS section, GCC by default puts variables that
-+are initialized to zero into BSS@. This can save space in the resulting
-+code.
-+
-+This option turns off this behavior because some programs explicitly
-+rely on variables going to the data section. E.g., so that the
-+resulting executable can find the beginning of that section and/or make
-+assumptions based on that.
-+
-+The default is @option{-fzero-initialized-in-bss}.
-+
-+@item -fmudflap -fmudflapth -fmudflapir
-+@opindex fmudflap
-+@opindex fmudflapth
-+@opindex fmudflapir
-+@cindex bounds checking
-+@cindex mudflap
-+For front-ends that support it (C and C++), instrument all risky
-+pointer/array dereferencing operations, some standard library
-+string/heap functions, and some other associated constructs with
-+range/validity tests. Modules so instrumented should be immune to
-+buffer overflows, invalid heap use, and some other classes of C/C++
-+programming errors. The instrumentation relies on a separate runtime
-+library (@file{libmudflap}), which will be linked into a program if
-+@option{-fmudflap} is given at link time. Run-time behavior of the
-+instrumented program is controlled by the @env{MUDFLAP_OPTIONS}
-+environment variable. See @code{env MUDFLAP_OPTIONS=-help a.out}
-+for its options.
-+
-+Use @option{-fmudflapth} instead of @option{-fmudflap} to compile and to
-+link if your program is multi-threaded. Use @option{-fmudflapir}, in
-+addition to @option{-fmudflap} or @option{-fmudflapth}, if
-+instrumentation should ignore pointer reads. This produces less
-+instrumentation (and therefore faster execution) and still provides
-+some protection against outright memory corrupting writes, but allows
-+erroneously read data to propagate within a program.
-+
-+@item -fthread-jumps
-+@opindex fthread-jumps
-+Perform optimizations where we check to see if a jump branches to a
-+location where another comparison subsumed by the first is found. If
-+so, the first branch is redirected to either the destination of the
-+second branch or a point immediately following it, depending on whether
-+the condition is known to be true or false.
-+
-+Enabled at levels @option{-O2}, @option{-O3}, @option{-Os}.
-+
-+@item -fsplit-wide-types
-+@opindex fsplit-wide-types
-+When using a type that occupies multiple registers, such as @code{long
-+long} on a 32-bit system, split the registers apart and allocate them
-+independently. This normally generates better code for those types,
-+but may make debugging more difficult.
-+
-+Enabled at levels @option{-O}, @option{-O2}, @option{-O3},
-+@option{-Os}.
-+
-+@item -fcse-follow-jumps
-+@opindex fcse-follow-jumps
-+In common subexpression elimination (CSE), scan through jump instructions
-+when the target of the jump is not reached by any other path. For
-+example, when CSE encounters an @code{if} statement with an
-+@code{else} clause, CSE will follow the jump when the condition
-+tested is false.
-+
-+Enabled at levels @option{-O2}, @option{-O3}, @option{-Os}.
-+
-+@item -fcse-skip-blocks
-+@opindex fcse-skip-blocks
-+This is similar to @option{-fcse-follow-jumps}, but causes CSE to
-+follow jumps which conditionally skip over blocks. When CSE
-+encounters a simple @code{if} statement with no else clause,
-+@option{-fcse-skip-blocks} causes CSE to follow the jump around the
-+body of the @code{if}.
-+
-+Enabled at levels @option{-O2}, @option{-O3}, @option{-Os}.
-+
-+@item -frerun-cse-after-loop
-+@opindex frerun-cse-after-loop
-+Re-run common subexpression elimination after loop optimizations has been
-+performed.
-+
-+Enabled at levels @option{-O2}, @option{-O3}, @option{-Os}.
-+
-+@item -fgcse
-+@opindex fgcse
-+Perform a global common subexpression elimination pass.
-+This pass also performs global constant and copy propagation.
-+
-+@emph{Note:} When compiling a program using computed gotos, a GCC
-+extension, you may get better runtime performance if you disable
-+the global common subexpression elimination pass by adding
-+@option{-fno-gcse} to the command line.
-+
-+Enabled at levels @option{-O2}, @option{-O3}, @option{-Os}.
-+
-+@item -fgcse-lm
-+@opindex fgcse-lm
-+When @option{-fgcse-lm} is enabled, global common subexpression elimination will
-+attempt to move loads which are only killed by stores into themselves. This
-+allows a loop containing a load/store sequence to be changed to a load outside
-+the loop, and a copy/store within the loop.
-+
-+Enabled by default when gcse is enabled.
-+
-+@item -fgcse-sm
-+@opindex fgcse-sm
-+When @option{-fgcse-sm} is enabled, a store motion pass is run after
-+global common subexpression elimination. This pass will attempt to move
-+stores out of loops. When used in conjunction with @option{-fgcse-lm},
-+loops containing a load/store sequence can be changed to a load before
-+the loop and a store after the loop.
-+
-+Not enabled at any optimization level.
-+
-+@item -fgcse-las
-+@opindex fgcse-las
-+When @option{-fgcse-las} is enabled, the global common subexpression
-+elimination pass eliminates redundant loads that come after stores to the
-+same memory location (both partial and full redundancies).
-+
-+Not enabled at any optimization level.
-+
-+@item -fgcse-after-reload
-+@opindex fgcse-after-reload
-+When @option{-fgcse-after-reload} is enabled, a redundant load elimination
-+pass is performed after reload. The purpose of this pass is to cleanup
-+redundant spilling.
-+
-+@item -funsafe-loop-optimizations
-+@opindex funsafe-loop-optimizations
-+If given, the loop optimizer will assume that loop indices do not
-+overflow, and that the loops with nontrivial exit condition are not
-+infinite. This enables a wider range of loop optimizations even if
-+the loop optimizer itself cannot prove that these assumptions are valid.
-+Using @option{-Wunsafe-loop-optimizations}, the compiler will warn you
-+if it finds this kind of loop.
-+
-+@item -fcrossjumping
-+@opindex fcrossjumping
-+Perform cross-jumping transformation. This transformation unifies equivalent code and save code size. The
-+resulting code may or may not perform better than without cross-jumping.
-+
-+Enabled at levels @option{-O2}, @option{-O3}, @option{-Os}.
-+
-+@item -fauto-inc-dec
-+@opindex fauto-inc-dec
-+Combine increments or decrements of addresses with memory accesses.
-+This pass is always skipped on architectures that do not have
-+instructions to support this. Enabled by default at @option{-O} and
-+higher on architectures that support this.
-+
-+@item -fdce
-+@opindex fdce
-+Perform dead code elimination (DCE) on RTL@.
-+Enabled by default at @option{-O} and higher.
-+
-+@item -fdse
-+@opindex fdse
-+Perform dead store elimination (DSE) on RTL@.
-+Enabled by default at @option{-O} and higher.
-+
-+@item -fif-conversion
-+@opindex fif-conversion
-+Attempt to transform conditional jumps into branch-less equivalents. This
-+include use of conditional moves, min, max, set flags and abs instructions, and
-+some tricks doable by standard arithmetics. The use of conditional execution
-+on chips where it is available is controlled by @code{if-conversion2}.
-+
-+Enabled at levels @option{-O}, @option{-O2}, @option{-O3}, @option{-Os}.
-+
-+@item -fif-conversion2
-+@opindex fif-conversion2
-+Use conditional execution (where available) to transform conditional jumps into
-+branch-less equivalents.
-+
-+Enabled at levels @option{-O}, @option{-O2}, @option{-O3}, @option{-Os}.
-+
-+@item -fdelete-null-pointer-checks
-+@opindex fdelete-null-pointer-checks
-+Use global dataflow analysis to identify and eliminate useless checks
-+for null pointers. The compiler assumes that dereferencing a null
-+pointer would have halted the program. If a pointer is checked after
-+it has already been dereferenced, it cannot be null.
-+
-+In some environments, this assumption is not true, and programs can
-+safely dereference null pointers. Use
-+@option{-fno-delete-null-pointer-checks} to disable this optimization
-+for programs which depend on that behavior.
-+
-+Enabled at levels @option{-O2}, @option{-O3}, @option{-Os}.
-+
-+@item -fexpensive-optimizations
-+@opindex fexpensive-optimizations
-+Perform a number of minor optimizations that are relatively expensive.
-+
-+Enabled at levels @option{-O2}, @option{-O3}, @option{-Os}.
-+
-+@item -foptimize-register-move
-+@itemx -fregmove
-+@opindex foptimize-register-move
-+@opindex fregmove
-+Attempt to reassign register numbers in move instructions and as
-+operands of other simple instructions in order to maximize the amount of
-+register tying. This is especially helpful on machines with two-operand
-+instructions.
-+
-+Note @option{-fregmove} and @option{-foptimize-register-move} are the same
-+optimization.
-+
-+Enabled at levels @option{-O2}, @option{-O3}, @option{-Os}.
-+
-+@item -fira-algorithm=@var{algorithm}
-+Use specified coloring algorithm for the integrated register
-+allocator. The @var{algorithm} argument should be @code{priority} or
-+@code{CB}. The first algorithm specifies Chow's priority coloring,
-+the second one specifies Chaitin-Briggs coloring. The second
-+algorithm can be unimplemented for some architectures. If it is
-+implemented, it is the default because Chaitin-Briggs coloring as a
-+rule generates a better code.
-+
-+@item -fira-region=@var{region}
-+Use specified regions for the integrated register allocator. The
-+@var{region} argument should be one of @code{all}, @code{mixed}, or
-+@code{one}. The first value means using all loops as register
-+allocation regions, the second value which is the default means using
-+all loops except for loops with small register pressure as the
-+regions, and third one means using all function as a single region.
-+The first value can give best result for machines with small size and
-+irregular register set, the third one results in faster and generates
-+decent code and the smallest size code, and the default value usually
-+give the best results in most cases and for most architectures.
-+
-+@item -fira-coalesce
-+@opindex fira-coalesce
-+Do optimistic register coalescing. This option might be profitable for
-+architectures with big regular register files.
-+
-+@item -fno-ira-share-save-slots
-+@opindex fno-ira-share-save-slots
-+Switch off sharing stack slots used for saving call used hard
-+registers living through a call. Each hard register will get a
-+separate stack slot and as a result function stack frame will be
-+bigger.
-+
-+@item -fno-ira-share-spill-slots
-+@opindex fno-ira-share-spill-slots
-+Switch off sharing stack slots allocated for pseudo-registers. Each
-+pseudo-register which did not get a hard register will get a separate
-+stack slot and as a result function stack frame will be bigger.
-+
-+@item -fira-verbose=@var{n}
-+@opindex fira-verbose
-+Set up how verbose dump file for the integrated register allocator
-+will be. Default value is 5. If the value is greater or equal to 10,
-+the dump file will be stderr as if the value were @var{n} minus 10.
-+
-+@item -fdelayed-branch
-+@opindex fdelayed-branch
-+If supported for the target machine, attempt to reorder instructions
-+to exploit instruction slots available after delayed branch
-+instructions.
-+
-+Enabled at levels @option{-O}, @option{-O2}, @option{-O3}, @option{-Os}.
-+
-+@item -fschedule-insns
-+@opindex fschedule-insns
-+If supported for the target machine, attempt to reorder instructions to
-+eliminate execution stalls due to required data being unavailable. This
-+helps machines that have slow floating point or memory load instructions
-+by allowing other instructions to be issued until the result of the load
-+or floating point instruction is required.
-+
-+Enabled at levels @option{-O2}, @option{-O3}, @option{-Os}.
-+
-+@item -fschedule-insns2
-+@opindex fschedule-insns2
-+Similar to @option{-fschedule-insns}, but requests an additional pass of
-+instruction scheduling after register allocation has been done. This is
-+especially useful on machines with a relatively small number of
-+registers and where memory load instructions take more than one cycle.
-+
-+Enabled at levels @option{-O2}, @option{-O3}, @option{-Os}.
-+
-+@item -fno-sched-interblock
-+@opindex fno-sched-interblock
-+Don't schedule instructions across basic blocks. This is normally
-+enabled by default when scheduling before register allocation, i.e.@:
-+with @option{-fschedule-insns} or at @option{-O2} or higher.
-+
-+@item -fno-sched-spec
-+@opindex fno-sched-spec
-+Don't allow speculative motion of non-load instructions. This is normally
-+enabled by default when scheduling before register allocation, i.e.@:
-+with @option{-fschedule-insns} or at @option{-O2} or higher.
-+
-+@item -fsched-spec-load
-+@opindex fsched-spec-load
-+Allow speculative motion of some load instructions. This only makes
-+sense when scheduling before register allocation, i.e.@: with
-+@option{-fschedule-insns} or at @option{-O2} or higher.
-+
-+@item -fsched-spec-load-dangerous
-+@opindex fsched-spec-load-dangerous
-+Allow speculative motion of more load instructions. This only makes
-+sense when scheduling before register allocation, i.e.@: with
-+@option{-fschedule-insns} or at @option{-O2} or higher.
-+
-+@item -fsched-stalled-insns
-+@itemx -fsched-stalled-insns=@var{n}
-+@opindex fsched-stalled-insns
-+Define how many insns (if any) can be moved prematurely from the queue
-+of stalled insns into the ready list, during the second scheduling pass.
-+@option{-fno-sched-stalled-insns} means that no insns will be moved
-+prematurely, @option{-fsched-stalled-insns=0} means there is no limit
-+on how many queued insns can be moved prematurely.
-+@option{-fsched-stalled-insns} without a value is equivalent to
-+@option{-fsched-stalled-insns=1}.
-+
-+@item -fsched-stalled-insns-dep
-+@itemx -fsched-stalled-insns-dep=@var{n}
-+@opindex fsched-stalled-insns-dep
-+Define how many insn groups (cycles) will be examined for a dependency
-+on a stalled insn that is candidate for premature removal from the queue
-+of stalled insns. This has an effect only during the second scheduling pass,
-+and only if @option{-fsched-stalled-insns} is used.
-+@option{-fno-sched-stalled-insns-dep} is equivalent to
-+@option{-fsched-stalled-insns-dep=0}.
-+@option{-fsched-stalled-insns-dep} without a value is equivalent to
-+@option{-fsched-stalled-insns-dep=1}.
-+
-+@item -fsched2-use-superblocks
-+@opindex fsched2-use-superblocks
-+When scheduling after register allocation, do use superblock scheduling
-+algorithm. Superblock scheduling allows motion across basic block boundaries
-+resulting on faster schedules. This option is experimental, as not all machine
-+descriptions used by GCC model the CPU closely enough to avoid unreliable
-+results from the algorithm.
-+
-+This only makes sense when scheduling after register allocation, i.e.@: with
-+@option{-fschedule-insns2} or at @option{-O2} or higher.
-+
-+@item -fsched2-use-traces
-+@opindex fsched2-use-traces
-+Use @option{-fsched2-use-superblocks} algorithm when scheduling after register
-+allocation and additionally perform code duplication in order to increase the
-+size of superblocks using tracer pass. See @option{-ftracer} for details on
-+trace formation.
-+
-+This mode should produce faster but significantly longer programs. Also
-+without @option{-fbranch-probabilities} the traces constructed may not
-+match the reality and hurt the performance. This only makes
-+sense when scheduling after register allocation, i.e.@: with
-+@option{-fschedule-insns2} or at @option{-O2} or higher.
-+
-+@item -fsee
-+@opindex fsee
-+Eliminate redundant sign extension instructions and move the non-redundant
-+ones to optimal placement using lazy code motion (LCM).
-+
-+@item -freschedule-modulo-scheduled-loops
-+@opindex freschedule-modulo-scheduled-loops
-+The modulo scheduling comes before the traditional scheduling, if a loop
-+was modulo scheduled we may want to prevent the later scheduling passes
-+from changing its schedule, we use this option to control that.
-+
-+@item -fselective-scheduling
-+@opindex fselective-scheduling
-+Schedule instructions using selective scheduling algorithm. Selective
-+scheduling runs instead of the first scheduler pass.
-+
-+@item -fselective-scheduling2
-+@opindex fselective-scheduling2
-+Schedule instructions using selective scheduling algorithm. Selective
-+scheduling runs instead of the second scheduler pass.
-+
-+@item -fsel-sched-pipelining
-+@opindex fsel-sched-pipelining
-+Enable software pipelining of innermost loops during selective scheduling.
-+This option has no effect until one of @option{-fselective-scheduling} or
-+@option{-fselective-scheduling2} is turned on.
-+
-+@item -fsel-sched-pipelining-outer-loops
-+@opindex fsel-sched-pipelining-outer-loops
-+When pipelining loops during selective scheduling, also pipeline outer loops.
-+This option has no effect until @option{-fsel-sched-pipelining} is turned on.
-+
-+@item -fcaller-saves
-+@opindex fcaller-saves
-+Enable values to be allocated in registers that will be clobbered by
-+function calls, by emitting extra instructions to save and restore the
-+registers around such calls. Such allocation is done only when it
-+seems to result in better code than would otherwise be produced.
-+
-+This option is always enabled by default on certain machines, usually
-+those which have no call-preserved registers to use instead.
-+
-+Enabled at levels @option{-O2}, @option{-O3}, @option{-Os}.
-+
-+@item -fconserve-stack
-+@opindex fconserve-stack
-+Attempt to minimize stack usage. The compiler will attempt to use less
-+stack space, even if that makes the program slower. This option
-+implies setting the @option{large-stack-frame} parameter to 100
-+and the @option{large-stack-frame-growth} parameter to 400.
-+
-+@item -ftree-reassoc
-+@opindex ftree-reassoc
-+Perform reassociation on trees. This flag is enabled by default
-+at @option{-O} and higher.
-+
-+@item -ftree-pre
-+@opindex ftree-pre
-+Perform partial redundancy elimination (PRE) on trees. This flag is
-+enabled by default at @option{-O2} and @option{-O3}.
-+
-+@item -ftree-fre
-+@opindex ftree-fre
-+Perform full redundancy elimination (FRE) on trees. The difference
-+between FRE and PRE is that FRE only considers expressions
-+that are computed on all paths leading to the redundant computation.
-+This analysis is faster than PRE, though it exposes fewer redundancies.
-+This flag is enabled by default at @option{-O} and higher.
-+
-+@item -ftree-copy-prop
-+@opindex ftree-copy-prop
-+Perform copy propagation on trees. This pass eliminates unnecessary
-+copy operations. This flag is enabled by default at @option{-O} and
-+higher.
-+
-+@item -fipa-pure-const
-+@opindex fipa-pure-const
-+Discover which functions are pure or constant.
-+Enabled by default at @option{-O} and higher.
-+
-+@item -fipa-reference
-+@opindex fipa-reference
-+Discover which static variables do not escape cannot escape the
-+compilation unit.
-+Enabled by default at @option{-O} and higher.
-+
-+@item -fipa-struct-reorg
-+@opindex fipa-struct-reorg
-+Perform structure reorganization optimization, that change C-like structures
-+layout in order to better utilize spatial locality. This transformation is
-+effective for programs containing arrays of structures. Available in two
-+compilation modes: profile-based (enabled with @option{-fprofile-generate})
-+or static (which uses built-in heuristics). Require @option{-fipa-type-escape}
-+to provide the safety of this transformation. It works only in whole program
-+mode, so it requires @option{-fwhole-program} and @option{-combine} to be
-+enabled. Structures considered @samp{cold} by this transformation are not
-+affected (see @option{--param struct-reorg-cold-struct-ratio=@var{value}}).
-+
-+With this flag, the program debug info reflects a new structure layout.
-+
-+@item -fipa-pta
-+@opindex fipa-pta
-+Perform interprocedural pointer analysis. This option is experimental
-+and does not affect generated code.
-+
-+@item -fipa-cp
-+@opindex fipa-cp
-+Perform interprocedural constant propagation.
-+This optimization analyzes the program to determine when values passed
-+to functions are constants and then optimizes accordingly.
-+This optimization can substantially increase performance
-+if the application has constants passed to functions.
-+This flag is enabled by default at @option{-O2}, @option{-Os} and @option{-O3}.
-+
-+@item -fipa-cp-clone
-+@opindex fipa-cp-clone
-+Perform function cloning to make interprocedural constant propagation stronger.
-+When enabled, interprocedural constant propagation will perform function cloning
-+when externally visible function can be called with constant arguments.
-+Because this optimization can create multiple copies of functions,
-+it may significantly increase code size
-+(see @option{--param ipcp-unit-growth=@var{value}}).
-+This flag is enabled by default at @option{-O3}.
-+
-+@item -fipa-matrix-reorg
-+@opindex fipa-matrix-reorg
-+Perform matrix flattening and transposing.
-+Matrix flattening tries to replace a m-dimensional matrix
-+with its equivalent n-dimensional matrix, where n < m.
-+This reduces the level of indirection needed for accessing the elements
-+of the matrix. The second optimization is matrix transposing that
-+attempts to change the order of the matrix's dimensions in order to
-+improve cache locality.
-+Both optimizations need the @option{-fwhole-program} flag.
-+Transposing is enabled only if profiling information is available.
-+
-+
-+@item -ftree-sink
-+@opindex ftree-sink
-+Perform forward store motion on trees. This flag is
-+enabled by default at @option{-O} and higher.
-+
-+@item -ftree-ccp
-+@opindex ftree-ccp
-+Perform sparse conditional constant propagation (CCP) on trees. This
-+pass only operates on local scalar variables and is enabled by default
-+at @option{-O} and higher.
-+
-+@item -ftree-switch-conversion
-+Perform conversion of simple initializations in a switch to
-+initializations from a scalar array. This flag is enabled by default
-+at @option{-O2} and higher.
-+
-+@item -ftree-dce
-+@opindex ftree-dce
-+Perform dead code elimination (DCE) on trees. This flag is enabled by
-+default at @option{-O} and higher.
-+
-+@item -ftree-builtin-call-dce
-+@opindex ftree-builtin-call-dce
-+Perform conditional dead code elimination (DCE) for calls to builtin functions
-+that may set @code{errno} but are otherwise side-effect free. This flag is
-+enabled by default at @option{-O2} and higher if @option{-Os} is not also
-+specified.
-+
-+@item -ftree-dominator-opts
-+@opindex ftree-dominator-opts
-+Perform a variety of simple scalar cleanups (constant/copy
-+propagation, redundancy elimination, range propagation and expression
-+simplification) based on a dominator tree traversal. This also
-+performs jump threading (to reduce jumps to jumps). This flag is
-+enabled by default at @option{-O} and higher.
-+
-+@item -ftree-dse
-+@opindex ftree-dse
-+Perform dead store elimination (DSE) on trees. A dead store is a store into
-+a memory location which will later be overwritten by another store without
-+any intervening loads. In this case the earlier store can be deleted. This
-+flag is enabled by default at @option{-O} and higher.
-+
-+@item -ftree-ch
-+@opindex ftree-ch
-+Perform loop header copying on trees. This is beneficial since it increases
-+effectiveness of code motion optimizations. It also saves one jump. This flag
-+is enabled by default at @option{-O} and higher. It is not enabled
-+for @option{-Os}, since it usually increases code size.
-+
-+@item -ftree-loop-optimize
-+@opindex ftree-loop-optimize
-+Perform loop optimizations on trees. This flag is enabled by default
-+at @option{-O} and higher.
-+
-+@item -ftree-loop-linear
-+@opindex ftree-loop-linear
-+Perform linear loop transformations on tree. This flag can improve cache
-+performance and allow further loop optimizations to take place.
-+
-+@item -floop-interchange
-+Perform loop interchange transformations on loops. Interchanging two
-+nested loops switches the inner and outer loops. For example, given a
-+loop like:
-+@smallexample
-+DO J = 1, M
-+ DO I = 1, N
-+ A(J, I) = A(J, I) * C
-+ ENDDO
-+ENDDO
-+@end smallexample
-+loop interchange will transform the loop as if the user had written:
-+@smallexample
-+DO I = 1, N
-+ DO J = 1, M
-+ A(J, I) = A(J, I) * C
-+ ENDDO
-+ENDDO
-+@end smallexample
-+which can be beneficial when @code{N} is larger than the caches,
-+because in Fortran, the elements of an array are stored in memory
-+contiguously by column, and the original loop iterates over rows,
-+potentially creating at each access a cache miss. This optimization
-+applies to all the languages supported by GCC and is not limited to
-+Fortran. To use this code transformation, GCC has to be configured
-+with @option{--with-ppl} and @option{--with-cloog} to enable the
-+Graphite loop transformation infrastructure.
-+
-+@item -floop-strip-mine
-+Perform loop strip mining transformations on loops. Strip mining
-+splits a loop into two nested loops. The outer loop has strides
-+equal to the strip size and the inner loop has strides of the
-+original loop within a strip. For example, given a loop like:
-+@smallexample
-+DO I = 1, N
-+ A(I) = A(I) + C
-+ENDDO
-+@end smallexample
-+loop strip mining will transform the loop as if the user had written:
-+@smallexample
-+DO II = 1, N, 4
-+ DO I = II, min (II + 3, N)
-+ A(I) = A(I) + C
-+ ENDDO
-+ENDDO
-+@end smallexample
-+This optimization applies to all the languages supported by GCC and is
-+not limited to Fortran. To use this code transformation, GCC has to
-+be configured with @option{--with-ppl} and @option{--with-cloog} to
-+enable the Graphite loop transformation infrastructure.
-+
-+@item -floop-block
-+Perform loop blocking transformations on loops. Blocking strip mines
-+each loop in the loop nest such that the memory accesses of the
-+element loops fit inside caches. For example, given a loop like:
-+@smallexample
-+DO I = 1, N
-+ DO J = 1, M
-+ A(J, I) = B(I) + C(J)
-+ ENDDO
-+ENDDO
-+@end smallexample
-+loop blocking will transform the loop as if the user had written:
-+@smallexample
-+DO II = 1, N, 64
-+ DO JJ = 1, M, 64
-+ DO I = II, min (II + 63, N)
-+ DO J = JJ, min (JJ + 63, M)
-+ A(J, I) = B(I) + C(J)
-+ ENDDO
-+ ENDDO
-+ ENDDO
-+ENDDO
-+@end smallexample
-+which can be beneficial when @code{M} is larger than the caches,
-+because the innermost loop will iterate over a smaller amount of data
-+that can be kept in the caches. This optimization applies to all the
-+languages supported by GCC and is not limited to Fortran. To use this
-+code transformation, GCC has to be configured with @option{--with-ppl}
-+and @option{--with-cloog} to enable the Graphite loop transformation
-+infrastructure.
-+
-+@item -fcheck-data-deps
-+@opindex fcheck-data-deps
-+Compare the results of several data dependence analyzers. This option
-+is used for debugging the data dependence analyzers.
-+
-+@item -ftree-loop-distribution
-+Perform loop distribution. This flag can improve cache performance on
-+big loop bodies and allow further loop optimizations, like
-+parallelization or vectorization, to take place. For example, the loop
-+@smallexample
-+DO I = 1, N
-+ A(I) = B(I) + C
-+ D(I) = E(I) * F
-+ENDDO
-+@end smallexample
-+is transformed to
-+@smallexample
-+DO I = 1, N
-+ A(I) = B(I) + C
-+ENDDO
-+DO I = 1, N
-+ D(I) = E(I) * F
-+ENDDO
-+@end smallexample
-+
-+@item -ftree-loop-im
-+@opindex ftree-loop-im
-+Perform loop invariant motion on trees. This pass moves only invariants that
-+would be hard to handle at RTL level (function calls, operations that expand to
-+nontrivial sequences of insns). With @option{-funswitch-loops} it also moves
-+operands of conditions that are invariant out of the loop, so that we can use
-+just trivial invariantness analysis in loop unswitching. The pass also includes
-+store motion.
-+
-+@item -ftree-loop-ivcanon
-+@opindex ftree-loop-ivcanon
-+Create a canonical counter for number of iterations in the loop for that
-+determining number of iterations requires complicated analysis. Later
-+optimizations then may determine the number easily. Useful especially
-+in connection with unrolling.
-+
-+@item -fivopts
-+@opindex fivopts
-+Perform induction variable optimizations (strength reduction, induction
-+variable merging and induction variable elimination) on trees.
-+
-+@item -ftree-parallelize-loops=n
-+@opindex ftree-parallelize-loops
-+Parallelize loops, i.e., split their iteration space to run in n threads.
-+This is only possible for loops whose iterations are independent
-+and can be arbitrarily reordered. The optimization is only
-+profitable on multiprocessor machines, for loops that are CPU-intensive,
-+rather than constrained e.g.@: by memory bandwidth. This option
-+implies @option{-pthread}, and thus is only supported on targets
-+that have support for @option{-pthread}.
-+
-+@item -ftree-sra
-+@opindex ftree-sra
-+Perform scalar replacement of aggregates. This pass replaces structure
-+references with scalars to prevent committing structures to memory too
-+early. This flag is enabled by default at @option{-O} and higher.
-+
-+@item -ftree-copyrename
-+@opindex ftree-copyrename
-+Perform copy renaming on trees. This pass attempts to rename compiler
-+temporaries to other variables at copy locations, usually resulting in
-+variable names which more closely resemble the original variables. This flag
-+is enabled by default at @option{-O} and higher.
-+
-+@item -ftree-ter
-+@opindex ftree-ter
-+Perform temporary expression replacement during the SSA->normal phase. Single
-+use/single def temporaries are replaced at their use location with their
-+defining expression. This results in non-GIMPLE code, but gives the expanders
-+much more complex trees to work on resulting in better RTL generation. This is
-+enabled by default at @option{-O} and higher.
-+
-+@item -ftree-vectorize
-+@opindex ftree-vectorize
-+Perform loop vectorization on trees. This flag is enabled by default at
-+@option{-O3}.
-+
-+@item -ftree-vect-loop-version
-+@opindex ftree-vect-loop-version
-+Perform loop versioning when doing loop vectorization on trees. When a loop
-+appears to be vectorizable except that data alignment or data dependence cannot
-+be determined at compile time then vectorized and non-vectorized versions of
-+the loop are generated along with runtime checks for alignment or dependence
-+to control which version is executed. This option is enabled by default
-+except at level @option{-Os} where it is disabled.
-+
-+@item -fvect-cost-model
-+@opindex fvect-cost-model
-+Enable cost model for vectorization.
-+
-+@item -ftree-vrp
-+@opindex ftree-vrp
-+Perform Value Range Propagation on trees. This is similar to the
-+constant propagation pass, but instead of values, ranges of values are
-+propagated. This allows the optimizers to remove unnecessary range
-+checks like array bound checks and null pointer checks. This is
-+enabled by default at @option{-O2} and higher. Null pointer check
-+elimination is only done if @option{-fdelete-null-pointer-checks} is
-+enabled.
-+
-+@item -ftracer
-+@opindex ftracer
-+Perform tail duplication to enlarge superblock size. This transformation
-+simplifies the control flow of the function allowing other optimizations to do
-+better job.
-+
-+@item -funroll-loops
-+@opindex funroll-loops
-+Unroll loops whose number of iterations can be determined at compile
-+time or upon entry to the loop. @option{-funroll-loops} implies
-+@option{-frerun-cse-after-loop}. This option makes code larger,
-+and may or may not make it run faster.
-+
-+@item -funroll-all-loops
-+@opindex funroll-all-loops
-+Unroll all loops, even if their number of iterations is uncertain when
-+the loop is entered. This usually makes programs run more slowly.
-+@option{-funroll-all-loops} implies the same options as
-+@option{-funroll-loops},
-+
-+@item -fsplit-ivs-in-unroller
-+@opindex fsplit-ivs-in-unroller
-+Enables expressing of values of induction variables in later iterations
-+of the unrolled loop using the value in the first iteration. This breaks
-+long dependency chains, thus improving efficiency of the scheduling passes.
-+
-+Combination of @option{-fweb} and CSE is often sufficient to obtain the
-+same effect. However in cases the loop body is more complicated than
-+a single basic block, this is not reliable. It also does not work at all
-+on some of the architectures due to restrictions in the CSE pass.
-+
-+This optimization is enabled by default.
-+
-+@item -fvariable-expansion-in-unroller
-+@opindex fvariable-expansion-in-unroller
-+With this option, the compiler will create multiple copies of some
-+local variables when unrolling a loop which can result in superior code.
-+
-+@item -fpredictive-commoning
-+@opindex fpredictive-commoning
-+Perform predictive commoning optimization, i.e., reusing computations
-+(especially memory loads and stores) performed in previous
-+iterations of loops.
-+
-+This option is enabled at level @option{-O3}.
-+
-+@item -fprefetch-loop-arrays
-+@opindex fprefetch-loop-arrays
-+If supported by the target machine, generate instructions to prefetch
-+memory to improve the performance of loops that access large arrays.
-+
-+This option may generate better or worse code; results are highly
-+dependent on the structure of loops within the source code.
-+
-+Disabled at level @option{-Os}.
-+
-+@item -fno-peephole
-+@itemx -fno-peephole2
-+@opindex fno-peephole
-+@opindex fno-peephole2
-+Disable any machine-specific peephole optimizations. The difference
-+between @option{-fno-peephole} and @option{-fno-peephole2} is in how they
-+are implemented in the compiler; some targets use one, some use the
-+other, a few use both.
-+
-+@option{-fpeephole} is enabled by default.
-+@option{-fpeephole2} enabled at levels @option{-O2}, @option{-O3}, @option{-Os}.
-+
-+@item -fno-guess-branch-probability
-+@opindex fno-guess-branch-probability
-+Do not guess branch probabilities using heuristics.
-+
-+GCC will use heuristics to guess branch probabilities if they are
-+not provided by profiling feedback (@option{-fprofile-arcs}). These
-+heuristics are based on the control flow graph. If some branch probabilities
-+are specified by @samp{__builtin_expect}, then the heuristics will be
-+used to guess branch probabilities for the rest of the control flow graph,
-+taking the @samp{__builtin_expect} info into account. The interactions
-+between the heuristics and @samp{__builtin_expect} can be complex, and in
-+some cases, it may be useful to disable the heuristics so that the effects
-+of @samp{__builtin_expect} are easier to understand.
-+
-+The default is @option{-fguess-branch-probability} at levels
-+@option{-O}, @option{-O2}, @option{-O3}, @option{-Os}.
-+
-+@item -freorder-blocks
-+@opindex freorder-blocks
-+Reorder basic blocks in the compiled function in order to reduce number of
-+taken branches and improve code locality.
-+
-+Enabled at levels @option{-O2}, @option{-O3}.
-+
-+@item -freorder-blocks-and-partition
-+@opindex freorder-blocks-and-partition
-+In addition to reordering basic blocks in the compiled function, in order
-+to reduce number of taken branches, partitions hot and cold basic blocks
-+into separate sections of the assembly and .o files, to improve
-+paging and cache locality performance.
-+
-+This optimization is automatically turned off in the presence of
-+exception handling, for linkonce sections, for functions with a user-defined
-+section attribute and on any architecture that does not support named
-+sections.
-+
-+@item -freorder-functions
-+@opindex freorder-functions
-+Reorder functions in the object file in order to
-+improve code locality. This is implemented by using special
-+subsections @code{.text.hot} for most frequently executed functions and
-+@code{.text.unlikely} for unlikely executed functions. Reordering is done by
-+the linker so object file format must support named sections and linker must
-+place them in a reasonable way.
-+
-+Also profile feedback must be available in to make this option effective. See
-+@option{-fprofile-arcs} for details.
-+
-+Enabled at levels @option{-O2}, @option{-O3}, @option{-Os}.
-+
-+@item -fstrict-aliasing
-+@opindex fstrict-aliasing
-+Allow the compiler to assume the strictest aliasing rules applicable to
-+the language being compiled. For C (and C++), this activates
-+optimizations based on the type of expressions. In particular, an
-+object of one type is assumed never to reside at the same address as an
-+object of a different type, unless the types are almost the same. For
-+example, an @code{unsigned int} can alias an @code{int}, but not a
-+@code{void*} or a @code{double}. A character type may alias any other
-+type.
-+
-+@anchor{Type-punning}Pay special attention to code like this:
-+@smallexample
-+union a_union @{
-+ int i;
-+ double d;
-+@};
-+
-+int f() @{
-+ union a_union t;
-+ t.d = 3.0;
-+ return t.i;
-+@}
-+@end smallexample
-+The practice of reading from a different union member than the one most
-+recently written to (called ``type-punning'') is common. Even with
-+@option{-fstrict-aliasing}, type-punning is allowed, provided the memory
-+is accessed through the union type. So, the code above will work as
-+expected. @xref{Structures unions enumerations and bit-fields
-+implementation}. However, this code might not:
-+@smallexample
-+int f() @{
-+ union a_union t;
-+ int* ip;
-+ t.d = 3.0;
-+ ip = &t.i;
-+ return *ip;
-+@}
-+@end smallexample
-+
-+Similarly, access by taking the address, casting the resulting pointer
-+and dereferencing the result has undefined behavior, even if the cast
-+uses a union type, e.g.:
-+@smallexample
-+int f() @{
-+ double d = 3.0;
-+ return ((union a_union *) &d)->i;
-+@}
-+@end smallexample
-+
-+The @option{-fstrict-aliasing} option is enabled at levels
-+@option{-O2}, @option{-O3}, @option{-Os}.
-+
-+@item -fstrict-overflow
-+@opindex fstrict-overflow
-+Allow the compiler to assume strict signed overflow rules, depending
-+on the language being compiled. For C (and C++) this means that
-+overflow when doing arithmetic with signed numbers is undefined, which
-+means that the compiler may assume that it will not happen. This
-+permits various optimizations. For example, the compiler will assume
-+that an expression like @code{i + 10 > i} will always be true for
-+signed @code{i}. This assumption is only valid if signed overflow is
-+undefined, as the expression is false if @code{i + 10} overflows when
-+using twos complement arithmetic. When this option is in effect any
-+attempt to determine whether an operation on signed numbers will
-+overflow must be written carefully to not actually involve overflow.
-+
-+This option also allows the compiler to assume strict pointer
-+semantics: given a pointer to an object, if adding an offset to that
-+pointer does not produce a pointer to the same object, the addition is
-+undefined. This permits the compiler to conclude that @code{p + u >
-+p} is always true for a pointer @code{p} and unsigned integer
-+@code{u}. This assumption is only valid because pointer wraparound is
-+undefined, as the expression is false if @code{p + u} overflows using
-+twos complement arithmetic.
-+
-+See also the @option{-fwrapv} option. Using @option{-fwrapv} means
-+that integer signed overflow is fully defined: it wraps. When
-+@option{-fwrapv} is used, there is no difference between
-+@option{-fstrict-overflow} and @option{-fno-strict-overflow} for
-+integers. With @option{-fwrapv} certain types of overflow are
-+permitted. For example, if the compiler gets an overflow when doing
-+arithmetic on constants, the overflowed value can still be used with
-+@option{-fwrapv}, but not otherwise.
-+
-+The @option{-fstrict-overflow} option is enabled at levels
-+@option{-O2}, @option{-O3}, @option{-Os}.
-+
-+@item -falign-functions
-+@itemx -falign-functions=@var{n}
-+@opindex falign-functions
-+Align the start of functions to the next power-of-two greater than
-+@var{n}, skipping up to @var{n} bytes. For instance,
-+@option{-falign-functions=32} aligns functions to the next 32-byte
-+boundary, but @option{-falign-functions=24} would align to the next
-+32-byte boundary only if this can be done by skipping 23 bytes or less.
-+
-+@option{-fno-align-functions} and @option{-falign-functions=1} are
-+equivalent and mean that functions will not be aligned.
-+
-+Some assemblers only support this flag when @var{n} is a power of two;
-+in that case, it is rounded up.
-+
-+If @var{n} is not specified or is zero, use a machine-dependent default.
-+
-+Enabled at levels @option{-O2}, @option{-O3}.
-+
-+@item -falign-labels
-+@itemx -falign-labels=@var{n}
-+@opindex falign-labels
-+Align all branch targets to a power-of-two boundary, skipping up to
-+@var{n} bytes like @option{-falign-functions}. This option can easily
-+make code slower, because it must insert dummy operations for when the
-+branch target is reached in the usual flow of the code.
-+
-+@option{-fno-align-labels} and @option{-falign-labels=1} are
-+equivalent and mean that labels will not be aligned.
-+
-+If @option{-falign-loops} or @option{-falign-jumps} are applicable and
-+are greater than this value, then their values are used instead.
-+
-+If @var{n} is not specified or is zero, use a machine-dependent default
-+which is very likely to be @samp{1}, meaning no alignment.
-+
-+Enabled at levels @option{-O2}, @option{-O3}.
-+
-+@item -falign-loops
-+@itemx -falign-loops=@var{n}
-+@opindex falign-loops
-+Align loops to a power-of-two boundary, skipping up to @var{n} bytes
-+like @option{-falign-functions}. The hope is that the loop will be
-+executed many times, which will make up for any execution of the dummy
-+operations.
-+
-+@option{-fno-align-loops} and @option{-falign-loops=1} are
-+equivalent and mean that loops will not be aligned.
-+
-+If @var{n} is not specified or is zero, use a machine-dependent default.
-+
-+Enabled at levels @option{-O2}, @option{-O3}.
-+
-+@item -falign-jumps
-+@itemx -falign-jumps=@var{n}
-+@opindex falign-jumps
-+Align branch targets to a power-of-two boundary, for branch targets
-+where the targets can only be reached by jumping, skipping up to @var{n}
-+bytes like @option{-falign-functions}. In this case, no dummy operations
-+need be executed.
-+
-+@option{-fno-align-jumps} and @option{-falign-jumps=1} are
-+equivalent and mean that loops will not be aligned.
-+
-+If @var{n} is not specified or is zero, use a machine-dependent default.
-+
-+Enabled at levels @option{-O2}, @option{-O3}.
-+
-+@item -funit-at-a-time
-+@opindex funit-at-a-time
-+This option is left for compatibility reasons. @option{-funit-at-a-time}
-+has no effect, while @option{-fno-unit-at-a-time} implies
-+@option{-fno-toplevel-reorder} and @option{-fno-section-anchors}.
-+
-+Enabled by default.
-+
-+@item -fno-toplevel-reorder
-+@opindex fno-toplevel-reorder
-+Do not reorder top-level functions, variables, and @code{asm}
-+statements. Output them in the same order that they appear in the
-+input file. When this option is used, unreferenced static variables
-+will not be removed. This option is intended to support existing code
-+which relies on a particular ordering. For new code, it is better to
-+use attributes.
-+
-+Enabled at level @option{-O0}. When disabled explicitly, it also imply
-+@option{-fno-section-anchors} that is otherwise enabled at @option{-O0} on some
-+targets.
-+
-+@item -fweb
-+@opindex fweb
-+Constructs webs as commonly used for register allocation purposes and assign
-+each web individual pseudo register. This allows the register allocation pass
-+to operate on pseudos directly, but also strengthens several other optimization
-+passes, such as CSE, loop optimizer and trivial dead code remover. It can,
-+however, make debugging impossible, since variables will no longer stay in a
-+``home register''.
-+
-+Enabled by default with @option{-funroll-loops}.
-+
-+@item -fwhole-program
-+@opindex fwhole-program
-+Assume that the current compilation unit represents whole program being
-+compiled. All public functions and variables with the exception of @code{main}
-+and those merged by attribute @code{externally_visible} become static functions
-+and in a affect gets more aggressively optimized by interprocedural optimizers.
-+While this option is equivalent to proper use of @code{static} keyword for
-+programs consisting of single file, in combination with option
-+@option{--combine} this flag can be used to compile most of smaller scale C
-+programs since the functions and variables become local for the whole combined
-+compilation unit, not for the single source file itself.
-+
-+This option is not supported for Fortran programs.
-+
-+@item -fcprop-registers
-+@opindex fcprop-registers
-+After register allocation and post-register allocation instruction splitting,
-+we perform a copy-propagation pass to try to reduce scheduling dependencies
-+and occasionally eliminate the copy.
-+
-+Enabled at levels @option{-O}, @option{-O2}, @option{-O3}, @option{-Os}.
-+
-+@item -fprofile-correction
-+@opindex fprofile-correction
-+Profiles collected using an instrumented binary for multi-threaded programs may
-+be inconsistent due to missed counter updates. When this option is specified,
-+GCC will use heuristics to correct or smooth out such inconsistencies. By
-+default, GCC will emit an error message when an inconsistent profile is detected.
-+
-+@item -fprofile-dir=@var{path}
-+@opindex fprofile-dir
-+
-+Set the directory to search the profile data files in to @var{path}.
-+This option affects only the profile data generated by
-+@option{-fprofile-generate}, @option{-ftest-coverage}, @option{-fprofile-arcs}
-+and used by @option{-fprofile-use} and @option{-fbranch-probabilities}
-+and its related options.
-+By default, GCC will use the current directory as @var{path}
-+thus the profile data file will appear in the same directory as the object file.
-+
-+@item -fprofile-generate
-+@itemx -fprofile-generate=@var{path}
-+@opindex fprofile-generate
-+
-+Enable options usually used for instrumenting application to produce
-+profile useful for later recompilation with profile feedback based
-+optimization. You must use @option{-fprofile-generate} both when
-+compiling and when linking your program.
-+
-+The following options are enabled: @code{-fprofile-arcs}, @code{-fprofile-values}, @code{-fvpt}.
-+
-+If @var{path} is specified, GCC will look at the @var{path} to find
-+the profile feedback data files. See @option{-fprofile-dir}.
-+
-+@item -fprofile-use
-+@itemx -fprofile-use=@var{path}
-+@opindex fprofile-use
-+Enable profile feedback directed optimizations, and optimizations
-+generally profitable only with profile feedback available.
-+
-+The following options are enabled: @code{-fbranch-probabilities}, @code{-fvpt},
-+@code{-funroll-loops}, @code{-fpeel-loops}, @code{-ftracer}
-+
-+By default, GCC emits an error message if the feedback profiles do not
-+match the source code. This error can be turned into a warning by using
-+@option{-Wcoverage-mismatch}. Note this may result in poorly optimized
-+code.
-+
-+If @var{path} is specified, GCC will look at the @var{path} to find
-+the profile feedback data files. See @option{-fprofile-dir}.
-+@end table
-+
-+The following options control compiler behavior regarding floating
-+point arithmetic. These options trade off between speed and
-+correctness. All must be specifically enabled.
-+
-+@table @gcctabopt
-+@item -ffloat-store
-+@opindex ffloat-store
-+Do not store floating point variables in registers, and inhibit other
-+options that might change whether a floating point value is taken from a
-+register or memory.
-+
-+@cindex floating point precision
-+This option prevents undesirable excess precision on machines such as
-+the 68000 where the floating registers (of the 68881) keep more
-+precision than a @code{double} is supposed to have. Similarly for the
-+x86 architecture. For most programs, the excess precision does only
-+good, but a few programs rely on the precise definition of IEEE floating
-+point. Use @option{-ffloat-store} for such programs, after modifying
-+them to store all pertinent intermediate computations into variables.
-+
-+@item -ffast-math
-+@opindex ffast-math
-+Sets @option{-fno-math-errno}, @option{-funsafe-math-optimizations},
-+@option{-ffinite-math-only}, @option{-fno-rounding-math},
-+@option{-fno-signaling-nans} and @option{-fcx-limited-range}.
-+
-+This option causes the preprocessor macro @code{__FAST_MATH__} to be defined.
-+
-+This option is not turned on by any @option{-O} option since
-+it can result in incorrect output for programs which depend on
-+an exact implementation of IEEE or ISO rules/specifications for
-+math functions. It may, however, yield faster code for programs
-+that do not require the guarantees of these specifications.
-+
-+@item -fno-math-errno
-+@opindex fno-math-errno
-+Do not set ERRNO after calling math functions that are executed
-+with a single instruction, e.g., sqrt. A program that relies on
-+IEEE exceptions for math error handling may want to use this flag
-+for speed while maintaining IEEE arithmetic compatibility.
-+
-+This option is not turned on by any @option{-O} option since
-+it can result in incorrect output for programs which depend on
-+an exact implementation of IEEE or ISO rules/specifications for
-+math functions. It may, however, yield faster code for programs
-+that do not require the guarantees of these specifications.
-+
-+The default is @option{-fmath-errno}.
-+
-+On Darwin systems, the math library never sets @code{errno}. There is
-+therefore no reason for the compiler to consider the possibility that
-+it might, and @option{-fno-math-errno} is the default.
-+
-+@item -funsafe-math-optimizations
-+@opindex funsafe-math-optimizations
-+
-+Allow optimizations for floating-point arithmetic that (a) assume
-+that arguments and results are valid and (b) may violate IEEE or
-+ANSI standards. When used at link-time, it may include libraries
-+or startup files that change the default FPU control word or other
-+similar optimizations.
-+
-+This option is not turned on by any @option{-O} option since
-+it can result in incorrect output for programs which depend on
-+an exact implementation of IEEE or ISO rules/specifications for
-+math functions. It may, however, yield faster code for programs
-+that do not require the guarantees of these specifications.
-+Enables @option{-fno-signed-zeros}, @option{-fno-trapping-math},
-+@option{-fassociative-math} and @option{-freciprocal-math}.
-+
-+The default is @option{-fno-unsafe-math-optimizations}.
-+
-+@item -fassociative-math
-+@opindex fassociative-math
-+
-+Allow re-association of operands in series of floating-point operations.
-+This violates the ISO C and C++ language standard by possibly changing
-+computation result. NOTE: re-ordering may change the sign of zero as
-+well as ignore NaNs and inhibit or create underflow or overflow (and
-+thus cannot be used on a code which relies on rounding behavior like
-+@code{(x + 2**52) - 2**52)}. May also reorder floating-point comparisons
-+and thus may not be used when ordered comparisons are required.
-+This option requires that both @option{-fno-signed-zeros} and
-+@option{-fno-trapping-math} be in effect. Moreover, it doesn't make
-+much sense with @option{-frounding-math}.
-+
-+The default is @option{-fno-associative-math}.
-+
-+@item -freciprocal-math
-+@opindex freciprocal-math
-+
-+Allow the reciprocal of a value to be used instead of dividing by
-+the value if this enables optimizations. For example @code{x / y}
-+can be replaced with @code{x * (1/y)} which is useful if @code{(1/y)}
-+is subject to common subexpression elimination. Note that this loses
-+precision and increases the number of flops operating on the value.
-+
-+The default is @option{-fno-reciprocal-math}.
-+
-+@item -ffinite-math-only
-+@opindex ffinite-math-only
-+Allow optimizations for floating-point arithmetic that assume
-+that arguments and results are not NaNs or +-Infs.
-+
-+This option is not turned on by any @option{-O} option since
-+it can result in incorrect output for programs which depend on
-+an exact implementation of IEEE or ISO rules/specifications for
-+math functions. It may, however, yield faster code for programs
-+that do not require the guarantees of these specifications.
-+
-+The default is @option{-fno-finite-math-only}.
-+
-+@item -fno-signed-zeros
-+@opindex fno-signed-zeros
-+Allow optimizations for floating point arithmetic that ignore the
-+signedness of zero. IEEE arithmetic specifies the behavior of
-+distinct +0.0 and @minus{}0.0 values, which then prohibits simplification
-+of expressions such as x+0.0 or 0.0*x (even with @option{-ffinite-math-only}).
-+This option implies that the sign of a zero result isn't significant.
-+
-+The default is @option{-fsigned-zeros}.
-+
-+@item -fno-trapping-math
-+@opindex fno-trapping-math
-+Compile code assuming that floating-point operations cannot generate
-+user-visible traps. These traps include division by zero, overflow,
-+underflow, inexact result and invalid operation. This option requires
-+that @option{-fno-signaling-nans} be in effect. Setting this option may
-+allow faster code if one relies on ``non-stop'' IEEE arithmetic, for example.
-+
-+This option should never be turned on by any @option{-O} option since
-+it can result in incorrect output for programs which depend on
-+an exact implementation of IEEE or ISO rules/specifications for
-+math functions.
-+
-+The default is @option{-ftrapping-math}.
-+
-+@item -frounding-math
-+@opindex frounding-math
-+Disable transformations and optimizations that assume default floating
-+point rounding behavior. This is round-to-zero for all floating point
-+to integer conversions, and round-to-nearest for all other arithmetic
-+truncations. This option should be specified for programs that change
-+the FP rounding mode dynamically, or that may be executed with a
-+non-default rounding mode. This option disables constant folding of
-+floating point expressions at compile-time (which may be affected by
-+rounding mode) and arithmetic transformations that are unsafe in the
-+presence of sign-dependent rounding modes.
-+
-+The default is @option{-fno-rounding-math}.
-+
-+This option is experimental and does not currently guarantee to
-+disable all GCC optimizations that are affected by rounding mode.
-+Future versions of GCC may provide finer control of this setting
-+using C99's @code{FENV_ACCESS} pragma. This command line option
-+will be used to specify the default state for @code{FENV_ACCESS}.
-+
-+@item -frtl-abstract-sequences
-+@opindex frtl-abstract-sequences
-+It is a size optimization method. This option is to find identical
-+sequences of code, which can be turned into pseudo-procedures and
-+then replace all occurrences with calls to the newly created
-+subroutine. It is kind of an opposite of @option{-finline-functions}.
-+This optimization runs at RTL level.
-+
-+@item -fsignaling-nans
-+@opindex fsignaling-nans
-+Compile code assuming that IEEE signaling NaNs may generate user-visible
-+traps during floating-point operations. Setting this option disables
-+optimizations that may change the number of exceptions visible with
-+signaling NaNs. This option implies @option{-ftrapping-math}.
-+
-+This option causes the preprocessor macro @code{__SUPPORT_SNAN__} to
-+be defined.
-+
-+The default is @option{-fno-signaling-nans}.
-+
-+This option is experimental and does not currently guarantee to
-+disable all GCC optimizations that affect signaling NaN behavior.
-+
-+@item -fsingle-precision-constant
-+@opindex fsingle-precision-constant
-+Treat floating point constant as single precision constant instead of
-+implicitly converting it to double precision constant.
-+
-+@item -fcx-limited-range
-+@opindex fcx-limited-range
-+When enabled, this option states that a range reduction step is not
-+needed when performing complex division. Also, there is no checking
-+whether the result of a complex multiplication or division is @code{NaN
-++ I*NaN}, with an attempt to rescue the situation in that case. The
-+default is @option{-fno-cx-limited-range}, but is enabled by
-+@option{-ffast-math}.
-+
-+This option controls the default setting of the ISO C99
-+@code{CX_LIMITED_RANGE} pragma. Nevertheless, the option applies to
-+all languages.
-+
-+@item -fcx-fortran-rules
-+@opindex fcx-fortran-rules
-+Complex multiplication and division follow Fortran rules. Range
-+reduction is done as part of complex division, but there is no checking
-+whether the result of a complex multiplication or division is @code{NaN
-++ I*NaN}, with an attempt to rescue the situation in that case.
-+
-+The default is @option{-fno-cx-fortran-rules}.
-+
-+@end table
-+
-+The following options control optimizations that may improve
-+performance, but are not enabled by any @option{-O} options. This
-+section includes experimental options that may produce broken code.
-+
-+@table @gcctabopt
-+@item -fbranch-probabilities
-+@opindex fbranch-probabilities
-+After running a program compiled with @option{-fprofile-arcs}
-+(@pxref{Debugging Options,, Options for Debugging Your Program or
-+@command{gcc}}), you can compile it a second time using
-+@option{-fbranch-probabilities}, to improve optimizations based on
-+the number of times each branch was taken. When the program
-+compiled with @option{-fprofile-arcs} exits it saves arc execution
-+counts to a file called @file{@var{sourcename}.gcda} for each source
-+file. The information in this data file is very dependent on the
-+structure of the generated code, so you must use the same source code
-+and the same optimization options for both compilations.
-+
-+With @option{-fbranch-probabilities}, GCC puts a
-+@samp{REG_BR_PROB} note on each @samp{JUMP_INSN} and @samp{CALL_INSN}.
-+These can be used to improve optimization. Currently, they are only
-+used in one place: in @file{reorg.c}, instead of guessing which path a
-+branch is mostly to take, the @samp{REG_BR_PROB} values are used to
-+exactly determine which path is taken more often.
-+
-+@item -fprofile-values
-+@opindex fprofile-values
-+If combined with @option{-fprofile-arcs}, it adds code so that some
-+data about values of expressions in the program is gathered.
-+
-+With @option{-fbranch-probabilities}, it reads back the data gathered
-+from profiling values of expressions and adds @samp{REG_VALUE_PROFILE}
-+notes to instructions for their later usage in optimizations.
-+
-+Enabled with @option{-fprofile-generate} and @option{-fprofile-use}.
-+
-+@item -fvpt
-+@opindex fvpt
-+If combined with @option{-fprofile-arcs}, it instructs the compiler to add
-+a code to gather information about values of expressions.
-+
-+With @option{-fbranch-probabilities}, it reads back the data gathered
-+and actually performs the optimizations based on them.
-+Currently the optimizations include specialization of division operation
-+using the knowledge about the value of the denominator.
-+
-+@item -frename-registers
-+@opindex frename-registers
-+Attempt to avoid false dependencies in scheduled code by making use
-+of registers left over after register allocation. This optimization
-+will most benefit processors with lots of registers. Depending on the
-+debug information format adopted by the target, however, it can
-+make debugging impossible, since variables will no longer stay in
-+a ``home register''.
-+
-+Enabled by default with @option{-funroll-loops}.
-+
-+@item -ftracer
-+@opindex ftracer
-+Perform tail duplication to enlarge superblock size. This transformation
-+simplifies the control flow of the function allowing other optimizations to do
-+better job.
-+
-+Enabled with @option{-fprofile-use}.
-+
-+@item -funroll-loops
-+@opindex funroll-loops
-+Unroll loops whose number of iterations can be determined at compile time or
-+upon entry to the loop. @option{-funroll-loops} implies
-+@option{-frerun-cse-after-loop}, @option{-fweb} and @option{-frename-registers}.
-+It also turns on complete loop peeling (i.e.@: complete removal of loops with
-+small constant number of iterations). This option makes code larger, and may
-+or may not make it run faster.
-+
-+Enabled with @option{-fprofile-use}.
-+
-+@item -funroll-all-loops
-+@opindex funroll-all-loops
-+Unroll all loops, even if their number of iterations is uncertain when
-+the loop is entered. This usually makes programs run more slowly.
-+@option{-funroll-all-loops} implies the same options as
-+@option{-funroll-loops}.
-+
-+@item -fpeel-loops
-+@opindex fpeel-loops
-+Peels the loops for that there is enough information that they do not
-+roll much (from profile feedback). It also turns on complete loop peeling
-+(i.e.@: complete removal of loops with small constant number of iterations).
-+
-+Enabled with @option{-fprofile-use}.
-+
-+@item -fmove-loop-invariants
-+@opindex fmove-loop-invariants
-+Enables the loop invariant motion pass in the RTL loop optimizer. Enabled
-+at level @option{-O1}
-+
-+@item -funswitch-loops
-+@opindex funswitch-loops
-+Move branches with loop invariant conditions out of the loop, with duplicates
-+of the loop on both branches (modified according to result of the condition).
-+
-+@item -ffunction-sections
-+@itemx -fdata-sections
-+@opindex ffunction-sections
-+@opindex fdata-sections
-+Place each function or data item into its own section in the output
-+file if the target supports arbitrary sections. The name of the
-+function or the name of the data item determines the section's name
-+in the output file.
-+
-+Use these options on systems where the linker can perform optimizations
-+to improve locality of reference in the instruction space. Most systems
-+using the ELF object format and SPARC processors running Solaris 2 have
-+linkers with such optimizations. AIX may have these optimizations in
-+the future.
-+
-+Only use these options when there are significant benefits from doing
-+so. When you specify these options, the assembler and linker will
-+create larger object and executable files and will also be slower.
-+You will not be able to use @code{gprof} on all systems if you
-+specify this option and you may have problems with debugging if
-+you specify both this option and @option{-g}.
-+
-+@item -fbranch-target-load-optimize
-+@opindex fbranch-target-load-optimize
-+Perform branch target register load optimization before prologue / epilogue
-+threading.
-+The use of target registers can typically be exposed only during reload,
-+thus hoisting loads out of loops and doing inter-block scheduling needs
-+a separate optimization pass.
-+
-+@item -fbranch-target-load-optimize2
-+@opindex fbranch-target-load-optimize2
-+Perform branch target register load optimization after prologue / epilogue
-+threading.
-+
-+@item -fbtr-bb-exclusive
-+@opindex fbtr-bb-exclusive
-+When performing branch target register load optimization, don't reuse
-+branch target registers in within any basic block.
-+
-+@item -fstack-protector
-+@opindex fstack-protector
-+Emit extra code to check for buffer overflows, such as stack smashing
-+attacks. This is done by adding a guard variable to functions with
-+vulnerable objects. This includes functions that call alloca, and
-+functions with buffers larger than 8 bytes. The guards are initialized
-+when a function is entered and then checked when the function exits.
-+If a guard check fails, an error message is printed and the program exits.
-+
-+@item -fstack-protector-all
-+@opindex fstack-protector-all
-+Like @option{-fstack-protector} except that all functions are protected.
-+
-+@item -fsection-anchors
-+@opindex fsection-anchors
-+Try to reduce the number of symbolic address calculations by using
-+shared ``anchor'' symbols to address nearby objects. This transformation
-+can help to reduce the number of GOT entries and GOT accesses on some
-+targets.
-+
-+For example, the implementation of the following function @code{foo}:
-+
-+@smallexample
-+static int a, b, c;
-+int foo (void) @{ return a + b + c; @}
-+@end smallexample
-+
-+would usually calculate the addresses of all three variables, but if you
-+compile it with @option{-fsection-anchors}, it will access the variables
-+from a common anchor point instead. The effect is similar to the
-+following pseudocode (which isn't valid C):
-+
-+@smallexample
-+int foo (void)
-+@{
-+ register int *xr = &x;
-+ return xr[&a - &x] + xr[&b - &x] + xr[&c - &x];
-+@}
-+@end smallexample
-+
-+Not all targets support this option.
-+
-+@item --param @var{name}=@var{value}
-+@opindex param
-+In some places, GCC uses various constants to control the amount of
-+optimization that is done. For example, GCC will not inline functions
-+that contain more that a certain number of instructions. You can
-+control some of these constants on the command-line using the
-+@option{--param} option.
-+
-+The names of specific parameters, and the meaning of the values, are
-+tied to the internals of the compiler, and are subject to change
-+without notice in future releases.
-+
-+In each case, the @var{value} is an integer. The allowable choices for
-+@var{name} are given in the following table:
-+
-+@table @gcctabopt
-+@item sra-max-structure-size
-+The maximum structure size, in bytes, at which the scalar replacement
-+of aggregates (SRA) optimization will perform block copies. The
-+default value, 0, implies that GCC will select the most appropriate
-+size itself.
-+
-+@item sra-field-structure-ratio
-+The threshold ratio (as a percentage) between instantiated fields and
-+the complete structure size. We say that if the ratio of the number
-+of bytes in instantiated fields to the number of bytes in the complete
-+structure exceeds this parameter, then block copies are not used. The
-+default is 75.
-+
-+@item struct-reorg-cold-struct-ratio
-+The threshold ratio (as a percentage) between a structure frequency
-+and the frequency of the hottest structure in the program. This parameter
-+is used by struct-reorg optimization enabled by @option{-fipa-struct-reorg}.
-+We say that if the ratio of a structure frequency, calculated by profiling,
-+to the hottest structure frequency in the program is less than this
-+parameter, then structure reorganization is not applied to this structure.
-+The default is 10.
-+
-+@item predictable-branch-cost-outcome
-+When branch is predicted to be taken with probability lower than this threshold
-+(in percent), then it is considered well predictable. The default is 10.
-+
-+@item max-crossjump-edges
-+The maximum number of incoming edges to consider for crossjumping.
-+The algorithm used by @option{-fcrossjumping} is @math{O(N^2)} in
-+the number of edges incoming to each block. Increasing values mean
-+more aggressive optimization, making the compile time increase with
-+probably small improvement in executable size.
-+
-+@item min-crossjump-insns
-+The minimum number of instructions which must be matched at the end
-+of two blocks before crossjumping will be performed on them. This
-+value is ignored in the case where all instructions in the block being
-+crossjumped from are matched. The default value is 5.
-+
-+@item max-grow-copy-bb-insns
-+The maximum code size expansion factor when copying basic blocks
-+instead of jumping. The expansion is relative to a jump instruction.
-+The default value is 8.
-+
-+@item max-goto-duplication-insns
-+The maximum number of instructions to duplicate to a block that jumps
-+to a computed goto. To avoid @math{O(N^2)} behavior in a number of
-+passes, GCC factors computed gotos early in the compilation process,
-+and unfactors them as late as possible. Only computed jumps at the
-+end of a basic blocks with no more than max-goto-duplication-insns are
-+unfactored. The default value is 8.
-+
-+@item max-delay-slot-insn-search
-+The maximum number of instructions to consider when looking for an
-+instruction to fill a delay slot. If more than this arbitrary number of
-+instructions is searched, the time savings from filling the delay slot
-+will be minimal so stop searching. Increasing values mean more
-+aggressive optimization, making the compile time increase with probably
-+small improvement in executable run time.
-+
-+@item max-delay-slot-live-search
-+When trying to fill delay slots, the maximum number of instructions to
-+consider when searching for a block with valid live register
-+information. Increasing this arbitrarily chosen value means more
-+aggressive optimization, increasing the compile time. This parameter
-+should be removed when the delay slot code is rewritten to maintain the
-+control-flow graph.
-+
-+@item max-gcse-memory
-+The approximate maximum amount of memory that will be allocated in
-+order to perform the global common subexpression elimination
-+optimization. If more memory than specified is required, the
-+optimization will not be done.
-+
-+@item max-gcse-passes
-+The maximum number of passes of GCSE to run. The default is 1.
-+
-+@item max-pending-list-length
-+The maximum number of pending dependencies scheduling will allow
-+before flushing the current state and starting over. Large functions
-+with few branches or calls can create excessively large lists which
-+needlessly consume memory and resources.
-+
-+@item max-inline-insns-single
-+Several parameters control the tree inliner used in gcc.
-+This number sets the maximum number of instructions (counted in GCC's
-+internal representation) in a single function that the tree inliner
-+will consider for inlining. This only affects functions declared
-+inline and methods implemented in a class declaration (C++).
-+The default value is 450.
-+
-+@item max-inline-insns-auto
-+When you use @option{-finline-functions} (included in @option{-O3}),
-+a lot of functions that would otherwise not be considered for inlining
-+by the compiler will be investigated. To those functions, a different
-+(more restrictive) limit compared to functions declared inline can
-+be applied.
-+The default value is 90.
-+
-+@item large-function-insns
-+The limit specifying really large functions. For functions larger than this
-+limit after inlining, inlining is constrained by
-+@option{--param large-function-growth}. This parameter is useful primarily
-+to avoid extreme compilation time caused by non-linear algorithms used by the
-+backend.
-+The default value is 2700.
-+
-+@item large-function-growth
-+Specifies maximal growth of large function caused by inlining in percents.
-+The default value is 100 which limits large function growth to 2.0 times
-+the original size.
-+
-+@item large-unit-insns
-+The limit specifying large translation unit. Growth caused by inlining of
-+units larger than this limit is limited by @option{--param inline-unit-growth}.
-+For small units this might be too tight (consider unit consisting of function A
-+that is inline and B that just calls A three time. If B is small relative to
-+A, the growth of unit is 300\% and yet such inlining is very sane. For very
-+large units consisting of small inlineable functions however the overall unit
-+growth limit is needed to avoid exponential explosion of code size. Thus for
-+smaller units, the size is increased to @option{--param large-unit-insns}
-+before applying @option{--param inline-unit-growth}. The default is 10000
-+
-+@item inline-unit-growth
-+Specifies maximal overall growth of the compilation unit caused by inlining.
-+The default value is 30 which limits unit growth to 1.3 times the original
-+size.
-+
-+@item ipcp-unit-growth
-+Specifies maximal overall growth of the compilation unit caused by
-+interprocedural constant propagation. The default value is 10 which limits
-+unit growth to 1.1 times the original size.
-+
-+@item large-stack-frame
-+The limit specifying large stack frames. While inlining the algorithm is trying
-+to not grow past this limit too much. Default value is 256 bytes.
-+
-+@item large-stack-frame-growth
-+Specifies maximal growth of large stack frames caused by inlining in percents.
-+The default value is 1000 which limits large stack frame growth to 11 times
-+the original size.
-+
-+@item max-inline-insns-recursive
-+@itemx max-inline-insns-recursive-auto
-+Specifies maximum number of instructions out-of-line copy of self recursive inline
-+function can grow into by performing recursive inlining.
-+
-+For functions declared inline @option{--param max-inline-insns-recursive} is
-+taken into account. For function not declared inline, recursive inlining
-+happens only when @option{-finline-functions} (included in @option{-O3}) is
-+enabled and @option{--param max-inline-insns-recursive-auto} is used. The
-+default value is 450.
-+
-+@item max-inline-recursive-depth
-+@itemx max-inline-recursive-depth-auto
-+Specifies maximum recursion depth used by the recursive inlining.
-+
-+For functions declared inline @option{--param max-inline-recursive-depth} is
-+taken into account. For function not declared inline, recursive inlining
-+happens only when @option{-finline-functions} (included in @option{-O3}) is
-+enabled and @option{--param max-inline-recursive-depth-auto} is used. The
-+default value is 8.
-+
-+@item min-inline-recursive-probability
-+Recursive inlining is profitable only for function having deep recursion
-+in average and can hurt for function having little recursion depth by
-+increasing the prologue size or complexity of function body to other
-+optimizers.
-+
-+When profile feedback is available (see @option{-fprofile-generate}) the actual
-+recursion depth can be guessed from probability that function will recurse via
-+given call expression. This parameter limits inlining only to call expression
-+whose probability exceeds given threshold (in percents). The default value is
-+10.
-+
-+@item inline-call-cost
-+Specify cost of call instruction relative to simple arithmetics operations
-+(having cost of 1). Increasing this cost disqualifies inlining of non-leaf
-+functions and at the same time increases size of leaf function that is believed to
-+reduce function size by being inlined. In effect it increases amount of
-+inlining for code having large abstraction penalty (many functions that just
-+pass the arguments to other functions) and decrease inlining for code with low
-+abstraction penalty. The default value is 12.
-+
-+@item min-vect-loop-bound
-+The minimum number of iterations under which a loop will not get vectorized
-+when @option{-ftree-vectorize} is used. The number of iterations after
-+vectorization needs to be greater than the value specified by this option
-+to allow vectorization. The default value is 0.
-+
-+@item max-unrolled-insns
-+The maximum number of instructions that a loop should have if that loop
-+is unrolled, and if the loop is unrolled, it determines how many times
-+the loop code is unrolled.
-+
-+@item max-average-unrolled-insns
-+The maximum number of instructions biased by probabilities of their execution
-+that a loop should have if that loop is unrolled, and if the loop is unrolled,
-+it determines how many times the loop code is unrolled.
-+
-+@item max-unroll-times
-+The maximum number of unrollings of a single loop.
-+
-+@item max-peeled-insns
-+The maximum number of instructions that a loop should have if that loop
-+is peeled, and if the loop is peeled, it determines how many times
-+the loop code is peeled.
-+
-+@item max-peel-times
-+The maximum number of peelings of a single loop.
-+
-+@item max-completely-peeled-insns
-+The maximum number of insns of a completely peeled loop.
-+
-+@item max-completely-peel-times
-+The maximum number of iterations of a loop to be suitable for complete peeling.
-+
-+@item max-completely-peel-loop-nest-depth
-+The maximum depth of a loop nest suitable for complete peeling.
-+
-+@item max-unswitch-insns
-+The maximum number of insns of an unswitched loop.
-+
-+@item max-unswitch-level
-+The maximum number of branches unswitched in a single loop.
-+
-+@item lim-expensive
-+The minimum cost of an expensive expression in the loop invariant motion.
-+
-+@item iv-consider-all-candidates-bound
-+Bound on number of candidates for induction variables below that
-+all candidates are considered for each use in induction variable
-+optimizations. Only the most relevant candidates are considered
-+if there are more candidates, to avoid quadratic time complexity.
-+
-+@item iv-max-considered-uses
-+The induction variable optimizations give up on loops that contain more
-+induction variable uses.
-+
-+@item iv-always-prune-cand-set-bound
-+If number of candidates in the set is smaller than this value,
-+we always try to remove unnecessary ivs from the set during its
-+optimization when a new iv is added to the set.
-+
-+@item scev-max-expr-size
-+Bound on size of expressions used in the scalar evolutions analyzer.
-+Large expressions slow the analyzer.
-+
-+@item omega-max-vars
-+The maximum number of variables in an Omega constraint system.
-+The default value is 128.
-+
-+@item omega-max-geqs
-+The maximum number of inequalities in an Omega constraint system.
-+The default value is 256.
-+
-+@item omega-max-eqs
-+The maximum number of equalities in an Omega constraint system.
-+The default value is 128.
-+
-+@item omega-max-wild-cards
-+The maximum number of wildcard variables that the Omega solver will
-+be able to insert. The default value is 18.
-+
-+@item omega-hash-table-size
-+The size of the hash table in the Omega solver. The default value is
-+550.
-+
-+@item omega-max-keys
-+The maximal number of keys used by the Omega solver. The default
-+value is 500.
-+
-+@item omega-eliminate-redundant-constraints
-+When set to 1, use expensive methods to eliminate all redundant
-+constraints. The default value is 0.
-+
-+@item vect-max-version-for-alignment-checks
-+The maximum number of runtime checks that can be performed when
-+doing loop versioning for alignment in the vectorizer. See option
-+ftree-vect-loop-version for more information.
-+
-+@item vect-max-version-for-alias-checks
-+The maximum number of runtime checks that can be performed when
-+doing loop versioning for alias in the vectorizer. See option
-+ftree-vect-loop-version for more information.
-+
-+@item max-iterations-to-track
-+
-+The maximum number of iterations of a loop the brute force algorithm
-+for analysis of # of iterations of the loop tries to evaluate.
-+
-+@item hot-bb-count-fraction
-+Select fraction of the maximal count of repetitions of basic block in program
-+given basic block needs to have to be considered hot.
-+
-+@item hot-bb-frequency-fraction
-+Select fraction of the maximal frequency of executions of basic block in
-+function given basic block needs to have to be considered hot
-+
-+@item max-predicted-iterations
-+The maximum number of loop iterations we predict statically. This is useful
-+in cases where function contain single loop with known bound and other loop
-+with unknown. We predict the known number of iterations correctly, while
-+the unknown number of iterations average to roughly 10. This means that the
-+loop without bounds would appear artificially cold relative to the other one.
-+
-+@item align-threshold
-+
-+Select fraction of the maximal frequency of executions of basic block in
-+function given basic block will get aligned.
-+
-+@item align-loop-iterations
-+
-+A loop expected to iterate at lest the selected number of iterations will get
-+aligned.
-+
-+@item tracer-dynamic-coverage
-+@itemx tracer-dynamic-coverage-feedback
-+
-+This value is used to limit superblock formation once the given percentage of
-+executed instructions is covered. This limits unnecessary code size
-+expansion.
-+
-+The @option{tracer-dynamic-coverage-feedback} is used only when profile
-+feedback is available. The real profiles (as opposed to statically estimated
-+ones) are much less balanced allowing the threshold to be larger value.
-+
-+@item tracer-max-code-growth
-+Stop tail duplication once code growth has reached given percentage. This is
-+rather hokey argument, as most of the duplicates will be eliminated later in
-+cross jumping, so it may be set to much higher values than is the desired code
-+growth.
-+
-+@item tracer-min-branch-ratio
-+
-+Stop reverse growth when the reverse probability of best edge is less than this
-+threshold (in percent).
-+
-+@item tracer-min-branch-ratio
-+@itemx tracer-min-branch-ratio-feedback
-+
-+Stop forward growth if the best edge do have probability lower than this
-+threshold.
-+
-+Similarly to @option{tracer-dynamic-coverage} two values are present, one for
-+compilation for profile feedback and one for compilation without. The value
-+for compilation with profile feedback needs to be more conservative (higher) in
-+order to make tracer effective.
-+
-+@item max-cse-path-length
-+
-+Maximum number of basic blocks on path that cse considers. The default is 10.
-+
-+@item max-cse-insns
-+The maximum instructions CSE process before flushing. The default is 1000.
-+
-+@item max-aliased-vops
-+
-+Maximum number of virtual operands per function allowed to represent
-+aliases before triggering the alias partitioning heuristic. Alias
-+partitioning reduces compile times and memory consumption needed for
-+aliasing at the expense of precision loss in alias information. The
-+default value for this parameter is 100 for -O1, 500 for -O2 and 1000
-+for -O3.
-+
-+Notice that if a function contains more memory statements than the
-+value of this parameter, it is not really possible to achieve this
-+reduction. In this case, the compiler will use the number of memory
-+statements as the value for @option{max-aliased-vops}.
-+
-+@item avg-aliased-vops
-+
-+Average number of virtual operands per statement allowed to represent
-+aliases before triggering the alias partitioning heuristic. This
-+works in conjunction with @option{max-aliased-vops}. If a function
-+contains more than @option{max-aliased-vops} virtual operators, then
-+memory symbols will be grouped into memory partitions until either the
-+total number of virtual operators is below @option{max-aliased-vops}
-+or the average number of virtual operators per memory statement is
-+below @option{avg-aliased-vops}. The default value for this parameter
-+is 1 for -O1 and -O2, and 3 for -O3.
-+
-+@item ggc-min-expand
-+
-+GCC uses a garbage collector to manage its own memory allocation. This
-+parameter specifies the minimum percentage by which the garbage
-+collector's heap should be allowed to expand between collections.
-+Tuning this may improve compilation speed; it has no effect on code
-+generation.
-+
-+The default is 30% + 70% * (RAM/1GB) with an upper bound of 100% when
-+RAM >= 1GB@. If @code{getrlimit} is available, the notion of "RAM" is
-+the smallest of actual RAM and @code{RLIMIT_DATA} or @code{RLIMIT_AS}. If
-+GCC is not able to calculate RAM on a particular platform, the lower
-+bound of 30% is used. Setting this parameter and
-+@option{ggc-min-heapsize} to zero causes a full collection to occur at
-+every opportunity. This is extremely slow, but can be useful for
-+debugging.
-+
-+@item ggc-min-heapsize
-+
-+Minimum size of the garbage collector's heap before it begins bothering
-+to collect garbage. The first collection occurs after the heap expands
-+by @option{ggc-min-expand}% beyond @option{ggc-min-heapsize}. Again,
-+tuning this may improve compilation speed, and has no effect on code
-+generation.
-+
-+The default is the smaller of RAM/8, RLIMIT_RSS, or a limit which
-+tries to ensure that RLIMIT_DATA or RLIMIT_AS are not exceeded, but
-+with a lower bound of 4096 (four megabytes) and an upper bound of
-+131072 (128 megabytes). If GCC is not able to calculate RAM on a
-+particular platform, the lower bound is used. Setting this parameter
-+very large effectively disables garbage collection. Setting this
-+parameter and @option{ggc-min-expand} to zero causes a full collection
-+to occur at every opportunity.
-+
-+@item max-reload-search-insns
-+The maximum number of instruction reload should look backward for equivalent
-+register. Increasing values mean more aggressive optimization, making the
-+compile time increase with probably slightly better performance. The default
-+value is 100.
-+
-+@item max-cselib-memory-locations
-+The maximum number of memory locations cselib should take into account.
-+Increasing values mean more aggressive optimization, making the compile time
-+increase with probably slightly better performance. The default value is 500.
-+
-+@item reorder-blocks-duplicate
-+@itemx reorder-blocks-duplicate-feedback
-+
-+Used by basic block reordering pass to decide whether to use unconditional
-+branch or duplicate the code on its destination. Code is duplicated when its
-+estimated size is smaller than this value multiplied by the estimated size of
-+unconditional jump in the hot spots of the program.
-+
-+The @option{reorder-block-duplicate-feedback} is used only when profile
-+feedback is available and may be set to higher values than
-+@option{reorder-block-duplicate} since information about the hot spots is more
-+accurate.
-+
-+@item max-sched-ready-insns
-+The maximum number of instructions ready to be issued the scheduler should
-+consider at any given time during the first scheduling pass. Increasing
-+values mean more thorough searches, making the compilation time increase
-+with probably little benefit. The default value is 100.
-+
-+@item max-sched-region-blocks
-+The maximum number of blocks in a region to be considered for
-+interblock scheduling. The default value is 10.
-+
-+@item max-pipeline-region-blocks
-+The maximum number of blocks in a region to be considered for
-+pipelining in the selective scheduler. The default value is 15.
-+
-+@item max-sched-region-insns
-+The maximum number of insns in a region to be considered for
-+interblock scheduling. The default value is 100.
-+
-+@item max-pipeline-region-insns
-+The maximum number of insns in a region to be considered for
-+pipelining in the selective scheduler. The default value is 200.
-+
-+@item min-spec-prob
-+The minimum probability (in percents) of reaching a source block
-+for interblock speculative scheduling. The default value is 40.
-+
-+@item max-sched-extend-regions-iters
-+The maximum number of iterations through CFG to extend regions.
-+0 - disable region extension,
-+N - do at most N iterations.
-+The default value is 0.
-+
-+@item max-sched-insn-conflict-delay
-+The maximum conflict delay for an insn to be considered for speculative motion.
-+The default value is 3.
-+
-+@item sched-spec-prob-cutoff
-+The minimal probability of speculation success (in percents), so that
-+speculative insn will be scheduled.
-+The default value is 40.
-+
-+@item sched-mem-true-dep-cost
-+Minimal distance (in CPU cycles) between store and load targeting same
-+memory locations. The default value is 1.
-+
-+@item selsched-max-lookahead
-+The maximum size of the lookahead window of selective scheduling. It is a
-+depth of search for available instructions.
-+The default value is 50.
-+
-+@item selsched-max-sched-times
-+The maximum number of times that an instruction will be scheduled during
-+selective scheduling. This is the limit on the number of iterations
-+through which the instruction may be pipelined. The default value is 2.
-+
-+@item selsched-max-insns-to-rename
-+The maximum number of best instructions in the ready list that are considered
-+for renaming in the selective scheduler. The default value is 2.
-+
-+@item max-last-value-rtl
-+The maximum size measured as number of RTLs that can be recorded in an expression
-+in combiner for a pseudo register as last known value of that register. The default
-+is 10000.
-+
-+@item integer-share-limit
-+Small integer constants can use a shared data structure, reducing the
-+compiler's memory usage and increasing its speed. This sets the maximum
-+value of a shared integer constant. The default value is 256.
-+
-+@item min-virtual-mappings
-+Specifies the minimum number of virtual mappings in the incremental
-+SSA updater that should be registered to trigger the virtual mappings
-+heuristic defined by virtual-mappings-ratio. The default value is
-+100.
-+
-+@item virtual-mappings-ratio
-+If the number of virtual mappings is virtual-mappings-ratio bigger
-+than the number of virtual symbols to be updated, then the incremental
-+SSA updater switches to a full update for those symbols. The default
-+ratio is 3.
-+
-+@item ssp-buffer-size
-+The minimum size of buffers (i.e.@: arrays) that will receive stack smashing
-+protection when @option{-fstack-protection} is used.
-+
-+@item max-jump-thread-duplication-stmts
-+Maximum number of statements allowed in a block that needs to be
-+duplicated when threading jumps.
-+
-+@item max-fields-for-field-sensitive
-+Maximum number of fields in a structure we will treat in
-+a field sensitive manner during pointer analysis. The default is zero
-+for -O0, and -O1 and 100 for -Os, -O2, and -O3.
-+
-+@item prefetch-latency
-+Estimate on average number of instructions that are executed before
-+prefetch finishes. The distance we prefetch ahead is proportional
-+to this constant. Increasing this number may also lead to less
-+streams being prefetched (see @option{simultaneous-prefetches}).
-+
-+@item simultaneous-prefetches
-+Maximum number of prefetches that can run at the same time.
-+
-+@item l1-cache-line-size
-+The size of cache line in L1 cache, in bytes.
-+
-+@item l1-cache-size
-+The size of L1 cache, in kilobytes.
-+
-+@item l2-cache-size
-+The size of L2 cache, in kilobytes.
-+
-+@item use-canonical-types
-+Whether the compiler should use the ``canonical'' type system. By
-+default, this should always be 1, which uses a more efficient internal
-+mechanism for comparing types in C++ and Objective-C++. However, if
-+bugs in the canonical type system are causing compilation failures,
-+set this value to 0 to disable canonical types.
-+
-+@item switch-conversion-max-branch-ratio
-+Switch initialization conversion will refuse to create arrays that are
-+bigger than @option{switch-conversion-max-branch-ratio} times the number of
-+branches in the switch.
-+
-+@item max-partial-antic-length
-+Maximum length of the partial antic set computed during the tree
-+partial redundancy elimination optimization (@option{-ftree-pre}) when
-+optimizing at @option{-O3} and above. For some sorts of source code
-+the enhanced partial redundancy elimination optimization can run away,
-+consuming all of the memory available on the host machine. This
-+parameter sets a limit on the length of the sets that are computed,
-+which prevents the runaway behavior. Setting a value of 0 for
-+this parameter will allow an unlimited set length.
-+
-+@item sccvn-max-scc-size
-+Maximum size of a strongly connected component (SCC) during SCCVN
-+processing. If this limit is hit, SCCVN processing for the whole
-+function will not be done and optimizations depending on it will
-+be disabled. The default maximum SCC size is 10000.
-+
-+@item ira-max-loops-num
-+IRA uses a regional register allocation by default. If a function
-+contains loops more than number given by the parameter, only at most
-+given number of the most frequently executed loops will form regions
-+for the regional register allocation. The default value of the
-+parameter is 100.
-+
-+@item ira-max-conflict-table-size
-+Although IRA uses a sophisticated algorithm of compression conflict
-+table, the table can be still big for huge functions. If the conflict
-+table for a function could be more than size in MB given by the
-+parameter, the conflict table is not built and faster, simpler, and
-+lower quality register allocation algorithm will be used. The
-+algorithm do not use pseudo-register conflicts. The default value of
-+the parameter is 2000.
-+
-+@item loop-invariant-max-bbs-in-loop
-+Loop invariant motion can be very expensive, both in compile time and
-+in amount of needed compile time memory, with very large loops. Loops
-+with more basic blocks than this parameter won't have loop invariant
-+motion optimization performed on them. The default value of the
-+parameter is 1000 for -O1 and 10000 for -O2 and above.
-+
-+@end table
-+@end table
-+
-+@node Preprocessor Options
-+@section Options Controlling the Preprocessor
-+@cindex preprocessor options
-+@cindex options, preprocessor
-+
-+These options control the C preprocessor, which is run on each C source
-+file before actual compilation.
-+
-+If you use the @option{-E} option, nothing is done except preprocessing.
-+Some of these options make sense only together with @option{-E} because
-+they cause the preprocessor output to be unsuitable for actual
-+compilation.
-+
-+@table @gcctabopt
-+@item -Wp,@var{option}
-+@opindex Wp
-+You can use @option{-Wp,@var{option}} to bypass the compiler driver
-+and pass @var{option} directly through to the preprocessor. If
-+@var{option} contains commas, it is split into multiple options at the
-+commas. However, many options are modified, translated or interpreted
-+by the compiler driver before being passed to the preprocessor, and
-+@option{-Wp} forcibly bypasses this phase. The preprocessor's direct
-+interface is undocumented and subject to change, so whenever possible
-+you should avoid using @option{-Wp} and let the driver handle the
-+options instead.
-+
-+@item -Xpreprocessor @var{option}
-+@opindex Xpreprocessor
-+Pass @var{option} as an option to the preprocessor. You can use this to
-+supply system-specific preprocessor options which GCC does not know how to
-+recognize.
-+
-+If you want to pass an option that takes an argument, you must use
-+@option{-Xpreprocessor} twice, once for the option and once for the argument.
-+@end table
-+
-+@include cppopts.texi
-+
-+@node Assembler Options
-+@section Passing Options to the Assembler
-+
-+@c prevent bad page break with this line
-+You can pass options to the assembler.
-+
-+@table @gcctabopt
-+@item -Wa,@var{option}
-+@opindex Wa
-+Pass @var{option} as an option to the assembler. If @var{option}
-+contains commas, it is split into multiple options at the commas.
-+
-+@item -Xassembler @var{option}
-+@opindex Xassembler
-+Pass @var{option} as an option to the assembler. You can use this to
-+supply system-specific assembler options which GCC does not know how to
-+recognize.
-+
-+If you want to pass an option that takes an argument, you must use
-+@option{-Xassembler} twice, once for the option and once for the argument.
-+
-+@end table
-+
-+@node Link Options
-+@section Options for Linking
-+@cindex link options
-+@cindex options, linking
-+
-+These options come into play when the compiler links object files into
-+an executable output file. They are meaningless if the compiler is
-+not doing a link step.
-+
-+@table @gcctabopt
-+@cindex file names
-+@item @var{object-file-name}
-+A file name that does not end in a special recognized suffix is
-+considered to name an object file or library. (Object files are
-+distinguished from libraries by the linker according to the file
-+contents.) If linking is done, these object files are used as input
-+to the linker.
-+
-+@item -c
-+@itemx -S
-+@itemx -E
-+@opindex c
-+@opindex S
-+@opindex E
-+If any of these options is used, then the linker is not run, and
-+object file names should not be used as arguments. @xref{Overall
-+Options}.
-+
-+@cindex Libraries
-+@item -l@var{library}
-+@itemx -l @var{library}
-+@opindex l
-+Search the library named @var{library} when linking. (The second
-+alternative with the library as a separate argument is only for
-+POSIX compliance and is not recommended.)
-+
-+It makes a difference where in the command you write this option; the
-+linker searches and processes libraries and object files in the order they
-+are specified. Thus, @samp{foo.o -lz bar.o} searches library @samp{z}
-+after file @file{foo.o} but before @file{bar.o}. If @file{bar.o} refers
-+to functions in @samp{z}, those functions may not be loaded.
-+
-+The linker searches a standard list of directories for the library,
-+which is actually a file named @file{lib@var{library}.a}. The linker
-+then uses this file as if it had been specified precisely by name.
-+
-+The directories searched include several standard system directories
-+plus any that you specify with @option{-L}.
-+
-+Normally the files found this way are library files---archive files
-+whose members are object files. The linker handles an archive file by
-+scanning through it for members which define symbols that have so far
-+been referenced but not defined. But if the file that is found is an
-+ordinary object file, it is linked in the usual fashion. The only
-+difference between using an @option{-l} option and specifying a file name
-+is that @option{-l} surrounds @var{library} with @samp{lib} and @samp{.a}
-+and searches several directories.
-+
-+@item -lobjc
-+@opindex lobjc
-+You need this special case of the @option{-l} option in order to
-+link an Objective-C or Objective-C++ program.
-+
-+@item -nostartfiles
-+@opindex nostartfiles
-+Do not use the standard system startup files when linking.
-+The standard system libraries are used normally, unless @option{-nostdlib}
-+or @option{-nodefaultlibs} is used.
-+
-+@item -nodefaultlibs
-+@opindex nodefaultlibs
-+Do not use the standard system libraries when linking.
-+Only the libraries you specify will be passed to the linker.
-+The standard startup files are used normally, unless @option{-nostartfiles}
-+is used. The compiler may generate calls to @code{memcmp},
-+@code{memset}, @code{memcpy} and @code{memmove}.
-+These entries are usually resolved by entries in
-+libc. These entry points should be supplied through some other
-+mechanism when this option is specified.
-+
-+@item -nostdlib
-+@opindex nostdlib
-+Do not use the standard system startup files or libraries when linking.
-+No startup files and only the libraries you specify will be passed to
-+the linker. The compiler may generate calls to @code{memcmp}, @code{memset},
-+@code{memcpy} and @code{memmove}.
-+These entries are usually resolved by entries in
-+libc. These entry points should be supplied through some other
-+mechanism when this option is specified.
-+
-+@cindex @option{-lgcc}, use with @option{-nostdlib}
-+@cindex @option{-nostdlib} and unresolved references
-+@cindex unresolved references and @option{-nostdlib}
-+@cindex @option{-lgcc}, use with @option{-nodefaultlibs}
-+@cindex @option{-nodefaultlibs} and unresolved references
-+@cindex unresolved references and @option{-nodefaultlibs}
-+One of the standard libraries bypassed by @option{-nostdlib} and
-+@option{-nodefaultlibs} is @file{libgcc.a}, a library of internal subroutines
-+that GCC uses to overcome shortcomings of particular machines, or special
-+needs for some languages.
-+(@xref{Interface,,Interfacing to GCC Output,gccint,GNU Compiler
-+Collection (GCC) Internals},
-+for more discussion of @file{libgcc.a}.)
-+In most cases, you need @file{libgcc.a} even when you want to avoid
-+other standard libraries. In other words, when you specify @option{-nostdlib}
-+or @option{-nodefaultlibs} you should usually specify @option{-lgcc} as well.
-+This ensures that you have no unresolved references to internal GCC
-+library subroutines. (For example, @samp{__main}, used to ensure C++
-+constructors will be called; @pxref{Collect2,,@code{collect2}, gccint,
-+GNU Compiler Collection (GCC) Internals}.)
-+
-+@item -pie
-+@opindex pie
-+Produce a position independent executable on targets which support it.
-+For predictable results, you must also specify the same set of options
-+that were used to generate code (@option{-fpie}, @option{-fPIE},
-+or model suboptions) when you specify this option.
-+
-+@item -rdynamic
-+@opindex rdynamic
-+Pass the flag @option{-export-dynamic} to the ELF linker, on targets
-+that support it. This instructs the linker to add all symbols, not
-+only used ones, to the dynamic symbol table. This option is needed
-+for some uses of @code{dlopen} or to allow obtaining backtraces
-+from within a program.
-+
-+@item -s
-+@opindex s
-+Remove all symbol table and relocation information from the executable.
-+
-+@item -static
-+@opindex static
-+On systems that support dynamic linking, this prevents linking with the shared
-+libraries. On other systems, this option has no effect.
-+
-+@item -shared
-+@opindex shared
-+Produce a shared object which can then be linked with other objects to
-+form an executable. Not all systems support this option. For predictable
-+results, you must also specify the same set of options that were used to
-+generate code (@option{-fpic}, @option{-fPIC}, or model suboptions)
-+when you specify this option.@footnote{On some systems, @samp{gcc -shared}
-+needs to build supplementary stub code for constructors to work. On
-+multi-libbed systems, @samp{gcc -shared} must select the correct support
-+libraries to link against. Failing to supply the correct flags may lead
-+to subtle defects. Supplying them in cases where they are not necessary
-+is innocuous.}
-+
-+@item -shared-libgcc
-+@itemx -static-libgcc
-+@opindex shared-libgcc
-+@opindex static-libgcc
-+On systems that provide @file{libgcc} as a shared library, these options
-+force the use of either the shared or static version respectively.
-+If no shared version of @file{libgcc} was built when the compiler was
-+configured, these options have no effect.
-+
-+There are several situations in which an application should use the
-+shared @file{libgcc} instead of the static version. The most common
-+of these is when the application wishes to throw and catch exceptions
-+across different shared libraries. In that case, each of the libraries
-+as well as the application itself should use the shared @file{libgcc}.
-+
-+Therefore, the G++ and GCJ drivers automatically add
-+@option{-shared-libgcc} whenever you build a shared library or a main
-+executable, because C++ and Java programs typically use exceptions, so
-+this is the right thing to do.
-+
-+If, instead, you use the GCC driver to create shared libraries, you may
-+find that they will not always be linked with the shared @file{libgcc}.
-+If GCC finds, at its configuration time, that you have a non-GNU linker
-+or a GNU linker that does not support option @option{--eh-frame-hdr},
-+it will link the shared version of @file{libgcc} into shared libraries
-+by default. Otherwise, it will take advantage of the linker and optimize
-+away the linking with the shared version of @file{libgcc}, linking with
-+the static version of libgcc by default. This allows exceptions to
-+propagate through such shared libraries, without incurring relocation
-+costs at library load time.
-+
-+However, if a library or main executable is supposed to throw or catch
-+exceptions, you must link it using the G++ or GCJ driver, as appropriate
-+for the languages used in the program, or using the option
-+@option{-shared-libgcc}, such that it is linked with the shared
-+@file{libgcc}.
-+
-+@item -symbolic
-+@opindex symbolic
-+Bind references to global symbols when building a shared object. Warn
-+about any unresolved references (unless overridden by the link editor
-+option @samp{-Xlinker -z -Xlinker defs}). Only a few systems support
-+this option.
-+
-+@item -T @var{script}
-+@opindex T
-+@cindex linker script
-+Use @var{script} as the linker script. This option is supported by most
-+systems using the GNU linker. On some targets, such as bare-board
-+targets without an operating system, the @option{-T} option may be required
-+when linking to avoid references to undefined symbols.
-+
-+@item -Xlinker @var{option}
-+@opindex Xlinker
-+Pass @var{option} as an option to the linker. You can use this to
-+supply system-specific linker options which GCC does not know how to
-+recognize.
-+
-+If you want to pass an option that takes a separate argument, you must use
-+@option{-Xlinker} twice, once for the option and once for the argument.
-+For example, to pass @option{-assert definitions}, you must write
-+@samp{-Xlinker -assert -Xlinker definitions}. It does not work to write
-+@option{-Xlinker "-assert definitions"}, because this passes the entire
-+string as a single argument, which is not what the linker expects.
-+
-+When using the GNU linker, it is usually more convenient to pass
-+arguments to linker options using the @option{@var{option}=@var{value}}
-+syntax than as separate arguments. For example, you can specify
-+@samp{-Xlinker -Map=output.map} rather than
-+@samp{-Xlinker -Map -Xlinker output.map}. Other linkers may not support
-+this syntax for command-line options.
-+
-+@item -Wl,@var{option}
-+@opindex Wl
-+Pass @var{option} as an option to the linker. If @var{option} contains
-+commas, it is split into multiple options at the commas. You can use this
-+syntax to pass an argument to the option.
-+For example, @samp{-Wl,-Map,output.map} passes @samp{-Map output.map} to the
-+linker. When using the GNU linker, you can also get the same effect with
-+@samp{-Wl,-Map=output.map}.
-+
-+@item -u @var{symbol}
-+@opindex u
-+Pretend the symbol @var{symbol} is undefined, to force linking of
-+library modules to define it. You can use @option{-u} multiple times with
-+different symbols to force loading of additional library modules.
-+@end table
-+
-+@node Directory Options
-+@section Options for Directory Search
-+@cindex directory options
-+@cindex options, directory search
-+@cindex search path
-+
-+These options specify directories to search for header files, for
-+libraries and for parts of the compiler:
-+
-+@table @gcctabopt
-+@item -I@var{dir}
-+@opindex I
-+Add the directory @var{dir} to the head of the list of directories to be
-+searched for header files. This can be used to override a system header
-+file, substituting your own version, since these directories are
-+searched before the system header file directories. However, you should
-+not use this option to add directories that contain vendor-supplied
-+system header files (use @option{-isystem} for that). If you use more than
-+one @option{-I} option, the directories are scanned in left-to-right
-+order; the standard system directories come after.
-+
-+If a standard system include directory, or a directory specified with
-+@option{-isystem}, is also specified with @option{-I}, the @option{-I}
-+option will be ignored. The directory will still be searched but as a
-+system directory at its normal position in the system include chain.
-+This is to ensure that GCC's procedure to fix buggy system headers and
-+the ordering for the include_next directive are not inadvertently changed.
-+If you really need to change the search order for system directories,
-+use the @option{-nostdinc} and/or @option{-isystem} options.
-+
-+@item -iquote@var{dir}
-+@opindex iquote
-+Add the directory @var{dir} to the head of the list of directories to
-+be searched for header files only for the case of @samp{#include
-+"@var{file}"}; they are not searched for @samp{#include <@var{file}>},
-+otherwise just like @option{-I}.
-+
-+@item -L@var{dir}
-+@opindex L
-+Add directory @var{dir} to the list of directories to be searched
-+for @option{-l}.
-+
-+@item -B@var{prefix}
-+@opindex B
-+This option specifies where to find the executables, libraries,
-+include files, and data files of the compiler itself.
-+
-+The compiler driver program runs one or more of the subprograms
-+@file{cpp}, @file{cc1}, @file{as} and @file{ld}. It tries
-+@var{prefix} as a prefix for each program it tries to run, both with and
-+without @samp{@var{machine}/@var{version}/} (@pxref{Target Options}).
-+
-+For each subprogram to be run, the compiler driver first tries the
-+@option{-B} prefix, if any. If that name is not found, or if @option{-B}
-+was not specified, the driver tries two standard prefixes, which are
-+@file{/usr/lib/gcc/} and @file{/usr/local/lib/gcc/}. If neither of
-+those results in a file name that is found, the unmodified program
-+name is searched for using the directories specified in your
-+@env{PATH} environment variable.
-+
-+The compiler will check to see if the path provided by the @option{-B}
-+refers to a directory, and if necessary it will add a directory
-+separator character at the end of the path.
-+
-+@option{-B} prefixes that effectively specify directory names also apply
-+to libraries in the linker, because the compiler translates these
-+options into @option{-L} options for the linker. They also apply to
-+includes files in the preprocessor, because the compiler translates these
-+options into @option{-isystem} options for the preprocessor. In this case,
-+the compiler appends @samp{include} to the prefix.
-+
-+The run-time support file @file{libgcc.a} can also be searched for using
-+the @option{-B} prefix, if needed. If it is not found there, the two
-+standard prefixes above are tried, and that is all. The file is left
-+out of the link if it is not found by those means.
-+
-+Another way to specify a prefix much like the @option{-B} prefix is to use
-+the environment variable @env{GCC_EXEC_PREFIX}. @xref{Environment
-+Variables}.
-+
-+As a special kludge, if the path provided by @option{-B} is
-+@file{[dir/]stage@var{N}/}, where @var{N} is a number in the range 0 to
-+9, then it will be replaced by @file{[dir/]include}. This is to help
-+with boot-strapping the compiler.
-+
-+@item -specs=@var{file}
-+@opindex specs
-+Process @var{file} after the compiler reads in the standard @file{specs}
-+file, in order to override the defaults that the @file{gcc} driver
-+program uses when determining what switches to pass to @file{cc1},
-+@file{cc1plus}, @file{as}, @file{ld}, etc. More than one
-+@option{-specs=@var{file}} can be specified on the command line, and they
-+are processed in order, from left to right.
-+
-+@item --sysroot=@var{dir}
-+@opindex sysroot
-+Use @var{dir} as the logical root directory for headers and libraries.
-+For example, if the compiler would normally search for headers in
-+@file{/usr/include} and libraries in @file{/usr/lib}, it will instead
-+search @file{@var{dir}/usr/include} and @file{@var{dir}/usr/lib}.
-+
-+If you use both this option and the @option{-isysroot} option, then
-+the @option{--sysroot} option will apply to libraries, but the
-+@option{-isysroot} option will apply to header files.
-+
-+The GNU linker (beginning with version 2.16) has the necessary support
-+for this option. If your linker does not support this option, the
-+header file aspect of @option{--sysroot} will still work, but the
-+library aspect will not.
-+
-+@item -I-
-+@opindex I-
-+This option has been deprecated. Please use @option{-iquote} instead for
-+@option{-I} directories before the @option{-I-} and remove the @option{-I-}.
-+Any directories you specify with @option{-I} options before the @option{-I-}
-+option are searched only for the case of @samp{#include "@var{file}"};
-+they are not searched for @samp{#include <@var{file}>}.
-+
-+If additional directories are specified with @option{-I} options after
-+the @option{-I-}, these directories are searched for all @samp{#include}
-+directives. (Ordinarily @emph{all} @option{-I} directories are used
-+this way.)
-+
-+In addition, the @option{-I-} option inhibits the use of the current
-+directory (where the current input file came from) as the first search
-+directory for @samp{#include "@var{file}"}. There is no way to
-+override this effect of @option{-I-}. With @option{-I.} you can specify
-+searching the directory which was current when the compiler was
-+invoked. That is not exactly the same as what the preprocessor does
-+by default, but it is often satisfactory.
-+
-+@option{-I-} does not inhibit the use of the standard system directories
-+for header files. Thus, @option{-I-} and @option{-nostdinc} are
-+independent.
-+@end table
-+
-+@c man end
-+
-+@node Spec Files
-+@section Specifying subprocesses and the switches to pass to them
-+@cindex Spec Files
-+
-+@command{gcc} is a driver program. It performs its job by invoking a
-+sequence of other programs to do the work of compiling, assembling and
-+linking. GCC interprets its command-line parameters and uses these to
-+deduce which programs it should invoke, and which command-line options
-+it ought to place on their command lines. This behavior is controlled
-+by @dfn{spec strings}. In most cases there is one spec string for each
-+program that GCC can invoke, but a few programs have multiple spec
-+strings to control their behavior. The spec strings built into GCC can
-+be overridden by using the @option{-specs=} command-line switch to specify
-+a spec file.
-+
-+@dfn{Spec files} are plaintext files that are used to construct spec
-+strings. They consist of a sequence of directives separated by blank
-+lines. The type of directive is determined by the first non-whitespace
-+character on the line and it can be one of the following:
-+
-+@table @code
-+@item %@var{command}
-+Issues a @var{command} to the spec file processor. The commands that can
-+appear here are:
-+
-+@table @code
-+@item %include <@var{file}>
-+@cindex %include
-+Search for @var{file} and insert its text at the current point in the
-+specs file.
-+
-+@item %include_noerr <@var{file}>
-+@cindex %include_noerr
-+Just like @samp{%include}, but do not generate an error message if the include
-+file cannot be found.
-+
-+@item %rename @var{old_name} @var{new_name}
-+@cindex %rename
-+Rename the spec string @var{old_name} to @var{new_name}.
-+
-+@end table
-+
-+@item *[@var{spec_name}]:
-+This tells the compiler to create, override or delete the named spec
-+string. All lines after this directive up to the next directive or
-+blank line are considered to be the text for the spec string. If this
-+results in an empty string then the spec will be deleted. (Or, if the
-+spec did not exist, then nothing will happened.) Otherwise, if the spec
-+does not currently exist a new spec will be created. If the spec does
-+exist then its contents will be overridden by the text of this
-+directive, unless the first character of that text is the @samp{+}
-+character, in which case the text will be appended to the spec.
-+
-+@item [@var{suffix}]:
-+Creates a new @samp{[@var{suffix}] spec} pair. All lines after this directive
-+and up to the next directive or blank line are considered to make up the
-+spec string for the indicated suffix. When the compiler encounters an
-+input file with the named suffix, it will processes the spec string in
-+order to work out how to compile that file. For example:
-+
-+@smallexample
-+.ZZ:
-+z-compile -input %i
-+@end smallexample
-+
-+This says that any input file whose name ends in @samp{.ZZ} should be
-+passed to the program @samp{z-compile}, which should be invoked with the
-+command-line switch @option{-input} and with the result of performing the
-+@samp{%i} substitution. (See below.)
-+
-+As an alternative to providing a spec string, the text that follows a
-+suffix directive can be one of the following:
-+
-+@table @code
-+@item @@@var{language}
-+This says that the suffix is an alias for a known @var{language}. This is
-+similar to using the @option{-x} command-line switch to GCC to specify a
-+language explicitly. For example:
-+
-+@smallexample
-+.ZZ:
-+@@c++
-+@end smallexample
-+
-+Says that .ZZ files are, in fact, C++ source files.
-+
-+@item #@var{name}
-+This causes an error messages saying:
-+
-+@smallexample
-+@var{name} compiler not installed on this system.
-+@end smallexample
-+@end table
-+
-+GCC already has an extensive list of suffixes built into it.
-+This directive will add an entry to the end of the list of suffixes, but
-+since the list is searched from the end backwards, it is effectively
-+possible to override earlier entries using this technique.
-+
-+@end table
-+
-+GCC has the following spec strings built into it. Spec files can
-+override these strings or create their own. Note that individual
-+targets can also add their own spec strings to this list.
-+
-+@smallexample
-+asm Options to pass to the assembler
-+asm_final Options to pass to the assembler post-processor
-+cpp Options to pass to the C preprocessor
-+cc1 Options to pass to the C compiler
-+cc1plus Options to pass to the C++ compiler
-+endfile Object files to include at the end of the link
-+link Options to pass to the linker
-+lib Libraries to include on the command line to the linker
-+libgcc Decides which GCC support library to pass to the linker
-+linker Sets the name of the linker
-+predefines Defines to be passed to the C preprocessor
-+signed_char Defines to pass to CPP to say whether @code{char} is signed
-+ by default
-+startfile Object files to include at the start of the link
-+@end smallexample
-+
-+Here is a small example of a spec file:
-+
-+@smallexample
-+%rename lib old_lib
-+
-+*lib:
-+--start-group -lgcc -lc -leval1 --end-group %(old_lib)
-+@end smallexample
-+
-+This example renames the spec called @samp{lib} to @samp{old_lib} and
-+then overrides the previous definition of @samp{lib} with a new one.
-+The new definition adds in some extra command-line options before
-+including the text of the old definition.
-+
-+@dfn{Spec strings} are a list of command-line options to be passed to their
-+corresponding program. In addition, the spec strings can contain
-+@samp{%}-prefixed sequences to substitute variable text or to
-+conditionally insert text into the command line. Using these constructs
-+it is possible to generate quite complex command lines.
-+
-+Here is a table of all defined @samp{%}-sequences for spec
-+strings. Note that spaces are not generated automatically around the
-+results of expanding these sequences. Therefore you can concatenate them
-+together or combine them with constant text in a single argument.
-+
-+@table @code
-+@item %%
-+Substitute one @samp{%} into the program name or argument.
-+
-+@item %i
-+Substitute the name of the input file being processed.
-+
-+@item %b
-+Substitute the basename of the input file being processed.
-+This is the substring up to (and not including) the last period
-+and not including the directory.
-+
-+@item %B
-+This is the same as @samp{%b}, but include the file suffix (text after
-+the last period).
-+
-+@item %d
-+Marks the argument containing or following the @samp{%d} as a
-+temporary file name, so that that file will be deleted if GCC exits
-+successfully. Unlike @samp{%g}, this contributes no text to the
-+argument.
-+
-+@item %g@var{suffix}
-+Substitute a file name that has suffix @var{suffix} and is chosen
-+once per compilation, and mark the argument in the same way as
-+@samp{%d}. To reduce exposure to denial-of-service attacks, the file
-+name is now chosen in a way that is hard to predict even when previously
-+chosen file names are known. For example, @samp{%g.s @dots{} %g.o @dots{} %g.s}
-+might turn into @samp{ccUVUUAU.s ccXYAXZ12.o ccUVUUAU.s}. @var{suffix} matches
-+the regexp @samp{[.A-Za-z]*} or the special string @samp{%O}, which is
-+treated exactly as if @samp{%O} had been preprocessed. Previously, @samp{%g}
-+was simply substituted with a file name chosen once per compilation,
-+without regard to any appended suffix (which was therefore treated
-+just like ordinary text), making such attacks more likely to succeed.
-+
-+@item %u@var{suffix}
-+Like @samp{%g}, but generates a new temporary file name even if
-+@samp{%u@var{suffix}} was already seen.
-+
-+@item %U@var{suffix}
-+Substitutes the last file name generated with @samp{%u@var{suffix}}, generating a
-+new one if there is no such last file name. In the absence of any
-+@samp{%u@var{suffix}}, this is just like @samp{%g@var{suffix}}, except they don't share
-+the same suffix @emph{space}, so @samp{%g.s @dots{} %U.s @dots{} %g.s @dots{} %U.s}
-+would involve the generation of two distinct file names, one
-+for each @samp{%g.s} and another for each @samp{%U.s}. Previously, @samp{%U} was
-+simply substituted with a file name chosen for the previous @samp{%u},
-+without regard to any appended suffix.
-+
-+@item %j@var{suffix}
-+Substitutes the name of the @code{HOST_BIT_BUCKET}, if any, and if it is
-+writable, and if save-temps is off; otherwise, substitute the name
-+of a temporary file, just like @samp{%u}. This temporary file is not
-+meant for communication between processes, but rather as a junk
-+disposal mechanism.
-+
-+@item %|@var{suffix}
-+@itemx %m@var{suffix}
-+Like @samp{%g}, except if @option{-pipe} is in effect. In that case
-+@samp{%|} substitutes a single dash and @samp{%m} substitutes nothing at
-+all. These are the two most common ways to instruct a program that it
-+should read from standard input or write to standard output. If you
-+need something more elaborate you can use an @samp{%@{pipe:@code{X}@}}
-+construct: see for example @file{f/lang-specs.h}.
-+
-+@item %.@var{SUFFIX}
-+Substitutes @var{.SUFFIX} for the suffixes of a matched switch's args
-+when it is subsequently output with @samp{%*}. @var{SUFFIX} is
-+terminated by the next space or %.
-+
-+@item %w
-+Marks the argument containing or following the @samp{%w} as the
-+designated output file of this compilation. This puts the argument
-+into the sequence of arguments that @samp{%o} will substitute later.
-+
-+@item %o
-+Substitutes the names of all the output files, with spaces
-+automatically placed around them. You should write spaces
-+around the @samp{%o} as well or the results are undefined.
-+@samp{%o} is for use in the specs for running the linker.
-+Input files whose names have no recognized suffix are not compiled
-+at all, but they are included among the output files, so they will
-+be linked.
-+
-+@item %O
-+Substitutes the suffix for object files. Note that this is
-+handled specially when it immediately follows @samp{%g, %u, or %U},
-+because of the need for those to form complete file names. The
-+handling is such that @samp{%O} is treated exactly as if it had already
-+been substituted, except that @samp{%g, %u, and %U} do not currently
-+support additional @var{suffix} characters following @samp{%O} as they would
-+following, for example, @samp{.o}.
-+
-+@item %p
-+Substitutes the standard macro predefinitions for the
-+current target machine. Use this when running @code{cpp}.
-+
-+@item %P
-+Like @samp{%p}, but puts @samp{__} before and after the name of each
-+predefined macro, except for macros that start with @samp{__} or with
-+@samp{_@var{L}}, where @var{L} is an uppercase letter. This is for ISO
-+C@.
-+
-+@item %I
-+Substitute any of @option{-iprefix} (made from @env{GCC_EXEC_PREFIX}),
-+@option{-isysroot} (made from @env{TARGET_SYSTEM_ROOT}),
-+@option{-isystem} (made from @env{COMPILER_PATH} and @option{-B} options)
-+and @option{-imultilib} as necessary.
-+
-+@item %s
-+Current argument is the name of a library or startup file of some sort.
-+Search for that file in a standard list of directories and substitute
-+the full name found.
-+
-+@item %e@var{str}
-+Print @var{str} as an error message. @var{str} is terminated by a newline.
-+Use this when inconsistent options are detected.
-+
-+@item %(@var{name})
-+Substitute the contents of spec string @var{name} at this point.
-+
-+@item %[@var{name}]
-+Like @samp{%(@dots{})} but put @samp{__} around @option{-D} arguments.
-+
-+@item %x@{@var{option}@}
-+Accumulate an option for @samp{%X}.
-+
-+@item %X
-+Output the accumulated linker options specified by @option{-Wl} or a @samp{%x}
-+spec string.
-+
-+@item %Y
-+Output the accumulated assembler options specified by @option{-Wa}.
-+
-+@item %Z
-+Output the accumulated preprocessor options specified by @option{-Wp}.
-+
-+@item %a
-+Process the @code{asm} spec. This is used to compute the
-+switches to be passed to the assembler.
-+
-+@item %A
-+Process the @code{asm_final} spec. This is a spec string for
-+passing switches to an assembler post-processor, if such a program is
-+needed.
-+
-+@item %l
-+Process the @code{link} spec. This is the spec for computing the
-+command line passed to the linker. Typically it will make use of the
-+@samp{%L %G %S %D and %E} sequences.
-+
-+@item %D
-+Dump out a @option{-L} option for each directory that GCC believes might
-+contain startup files. If the target supports multilibs then the
-+current multilib directory will be prepended to each of these paths.
-+
-+@item %L
-+Process the @code{lib} spec. This is a spec string for deciding which
-+libraries should be included on the command line to the linker.
-+
-+@item %G
-+Process the @code{libgcc} spec. This is a spec string for deciding
-+which GCC support library should be included on the command line to the linker.
-+
-+@item %S
-+Process the @code{startfile} spec. This is a spec for deciding which
-+object files should be the first ones passed to the linker. Typically
-+this might be a file named @file{crt0.o}.
-+
-+@item %E
-+Process the @code{endfile} spec. This is a spec string that specifies
-+the last object files that will be passed to the linker.
-+
-+@item %C
-+Process the @code{cpp} spec. This is used to construct the arguments
-+to be passed to the C preprocessor.
-+
-+@item %1
-+Process the @code{cc1} spec. This is used to construct the options to be
-+passed to the actual C compiler (@samp{cc1}).
-+
-+@item %2
-+Process the @code{cc1plus} spec. This is used to construct the options to be
-+passed to the actual C++ compiler (@samp{cc1plus}).
-+
-+@item %*
-+Substitute the variable part of a matched option. See below.
-+Note that each comma in the substituted string is replaced by
-+a single space.
-+
-+@item %<@code{S}
-+Remove all occurrences of @code{-S} from the command line. Note---this
-+command is position dependent. @samp{%} commands in the spec string
-+before this one will see @code{-S}, @samp{%} commands in the spec string
-+after this one will not.
-+
-+@item %:@var{function}(@var{args})
-+Call the named function @var{function}, passing it @var{args}.
-+@var{args} is first processed as a nested spec string, then split
-+into an argument vector in the usual fashion. The function returns
-+a string which is processed as if it had appeared literally as part
-+of the current spec.
-+
-+The following built-in spec functions are provided:
-+
-+@table @code
-+@item @code{getenv}
-+The @code{getenv} spec function takes two arguments: an environment
-+variable name and a string. If the environment variable is not
-+defined, a fatal error is issued. Otherwise, the return value is the
-+value of the environment variable concatenated with the string. For
-+example, if @env{TOPDIR} is defined as @file{/path/to/top}, then:
-+
-+@smallexample
-+%:getenv(TOPDIR /include)
-+@end smallexample
-+
-+expands to @file{/path/to/top/include}.
-+
-+@item @code{if-exists}
-+The @code{if-exists} spec function takes one argument, an absolute
-+pathname to a file. If the file exists, @code{if-exists} returns the
-+pathname. Here is a small example of its usage:
-+
-+@smallexample
-+*startfile:
-+crt0%O%s %:if-exists(crti%O%s) crtbegin%O%s
-+@end smallexample
-+
-+@item @code{if-exists-else}
-+The @code{if-exists-else} spec function is similar to the @code{if-exists}
-+spec function, except that it takes two arguments. The first argument is
-+an absolute pathname to a file. If the file exists, @code{if-exists-else}
-+returns the pathname. If it does not exist, it returns the second argument.
-+This way, @code{if-exists-else} can be used to select one file or another,
-+based on the existence of the first. Here is a small example of its usage:
-+
-+@smallexample
-+*startfile:
-+crt0%O%s %:if-exists(crti%O%s) \
-+%:if-exists-else(crtbeginT%O%s crtbegin%O%s)
-+@end smallexample
-+
-+@item @code{replace-outfile}
-+The @code{replace-outfile} spec function takes two arguments. It looks for the
-+first argument in the outfiles array and replaces it with the second argument. Here
-+is a small example of its usage:
-+
-+@smallexample
-+%@{fgnu-runtime:%:replace-outfile(-lobjc -lobjc-gnu)@}
-+@end smallexample
-+
-+@item @code{print-asm-header}
-+The @code{print-asm-header} function takes no arguments and simply
-+prints a banner like:
-+
-+@smallexample
-+Assembler options
-+=================
-+
-+Use "-Wa,OPTION" to pass "OPTION" to the assembler.
-+@end smallexample
-+
-+It is used to separate compiler options from assembler options
-+in the @option{--target-help} output.
-+@end table
-+
-+@item %@{@code{S}@}
-+Substitutes the @code{-S} switch, if that switch was given to GCC@.
-+If that switch was not specified, this substitutes nothing. Note that
-+the leading dash is omitted when specifying this option, and it is
-+automatically inserted if the substitution is performed. Thus the spec
-+string @samp{%@{foo@}} would match the command-line option @option{-foo}
-+and would output the command line option @option{-foo}.
-+
-+@item %W@{@code{S}@}
-+Like %@{@code{S}@} but mark last argument supplied within as a file to be
-+deleted on failure.
-+
-+@item %@{@code{S}*@}
-+Substitutes all the switches specified to GCC whose names start
-+with @code{-S}, but which also take an argument. This is used for
-+switches like @option{-o}, @option{-D}, @option{-I}, etc.
-+GCC considers @option{-o foo} as being
-+one switch whose names starts with @samp{o}. %@{o*@} would substitute this
-+text, including the space. Thus two arguments would be generated.
-+
-+@item %@{@code{S}*&@code{T}*@}
-+Like %@{@code{S}*@}, but preserve order of @code{S} and @code{T} options
-+(the order of @code{S} and @code{T} in the spec is not significant).
-+There can be any number of ampersand-separated variables; for each the
-+wild card is optional. Useful for CPP as @samp{%@{D*&U*&A*@}}.
-+
-+@item %@{@code{S}:@code{X}@}
-+Substitutes @code{X}, if the @samp{-S} switch was given to GCC@.
-+
-+@item %@{!@code{S}:@code{X}@}
-+Substitutes @code{X}, if the @samp{-S} switch was @emph{not} given to GCC@.
-+
-+@item %@{@code{S}*:@code{X}@}
-+Substitutes @code{X} if one or more switches whose names start with
-+@code{-S} are specified to GCC@. Normally @code{X} is substituted only
-+once, no matter how many such switches appeared. However, if @code{%*}
-+appears somewhere in @code{X}, then @code{X} will be substituted once
-+for each matching switch, with the @code{%*} replaced by the part of
-+that switch that matched the @code{*}.
-+
-+@item %@{.@code{S}:@code{X}@}
-+Substitutes @code{X}, if processing a file with suffix @code{S}.
-+
-+@item %@{!.@code{S}:@code{X}@}
-+Substitutes @code{X}, if @emph{not} processing a file with suffix @code{S}.
-+
-+@item %@{,@code{S}:@code{X}@}
-+Substitutes @code{X}, if processing a file for language @code{S}.
-+
-+@item %@{!,@code{S}:@code{X}@}
-+Substitutes @code{X}, if not processing a file for language @code{S}.
-+
-+@item %@{@code{S}|@code{P}:@code{X}@}
-+Substitutes @code{X} if either @code{-S} or @code{-P} was given to
-+GCC@. This may be combined with @samp{!}, @samp{.}, @samp{,}, and
-+@code{*} sequences as well, although they have a stronger binding than
-+the @samp{|}. If @code{%*} appears in @code{X}, all of the
-+alternatives must be starred, and only the first matching alternative
-+is substituted.
-+
-+For example, a spec string like this:
-+
-+@smallexample
-+%@{.c:-foo@} %@{!.c:-bar@} %@{.c|d:-baz@} %@{!.c|d:-boggle@}
-+@end smallexample
-+
-+will output the following command-line options from the following input
-+command-line options:
-+
-+@smallexample
-+fred.c -foo -baz
-+jim.d -bar -boggle
-+-d fred.c -foo -baz -boggle
-+-d jim.d -bar -baz -boggle
-+@end smallexample
-+
-+@item %@{S:X; T:Y; :D@}
-+
-+If @code{S} was given to GCC, substitutes @code{X}; else if @code{T} was
-+given to GCC, substitutes @code{Y}; else substitutes @code{D}. There can
-+be as many clauses as you need. This may be combined with @code{.},
-+@code{,}, @code{!}, @code{|}, and @code{*} as needed.
-+
-+
-+@end table
-+
-+The conditional text @code{X} in a %@{@code{S}:@code{X}@} or similar
-+construct may contain other nested @samp{%} constructs or spaces, or
-+even newlines. They are processed as usual, as described above.
-+Trailing white space in @code{X} is ignored. White space may also
-+appear anywhere on the left side of the colon in these constructs,
-+except between @code{.} or @code{*} and the corresponding word.
-+
-+The @option{-O}, @option{-f}, @option{-m}, and @option{-W} switches are
-+handled specifically in these constructs. If another value of
-+@option{-O} or the negated form of a @option{-f}, @option{-m}, or
-+@option{-W} switch is found later in the command line, the earlier
-+switch value is ignored, except with @{@code{S}*@} where @code{S} is
-+just one letter, which passes all matching options.
-+
-+The character @samp{|} at the beginning of the predicate text is used to
-+indicate that a command should be piped to the following command, but
-+only if @option{-pipe} is specified.
-+
-+It is built into GCC which switches take arguments and which do not.
-+(You might think it would be useful to generalize this to allow each
-+compiler's spec to say which switches take arguments. But this cannot
-+be done in a consistent fashion. GCC cannot even decide which input
-+files have been specified without knowing which switches take arguments,
-+and it must know which input files to compile in order to tell which
-+compilers to run).
-+
-+GCC also knows implicitly that arguments starting in @option{-l} are to be
-+treated as compiler output files, and passed to the linker in their
-+proper position among the other output files.
-+
-+@c man begin OPTIONS
-+
-+@node Target Options
-+@section Specifying Target Machine and Compiler Version
-+@cindex target options
-+@cindex cross compiling
-+@cindex specifying machine version
-+@cindex specifying compiler version and target machine
-+@cindex compiler version, specifying
-+@cindex target machine, specifying
-+
-+The usual way to run GCC is to run the executable called @file{gcc}, or
-+@file{<machine>-gcc} when cross-compiling, or
-+@file{<machine>-gcc-<version>} to run a version other than the one that
-+was installed last. Sometimes this is inconvenient, so GCC provides
-+options that will switch to another cross-compiler or version.
-+
-+@table @gcctabopt
-+@item -b @var{machine}
-+@opindex b
-+The argument @var{machine} specifies the target machine for compilation.
-+
-+The value to use for @var{machine} is the same as was specified as the
-+machine type when configuring GCC as a cross-compiler. For
-+example, if a cross-compiler was configured with @samp{configure
-+arm-elf}, meaning to compile for an arm processor with elf binaries,
-+then you would specify @option{-b arm-elf} to run that cross compiler.
-+Because there are other options beginning with @option{-b}, the
-+configuration must contain a hyphen, or @option{-b} alone should be one
-+argument followed by the configuration in the next argument.
-+
-+@item -V @var{version}
-+@opindex V
-+The argument @var{version} specifies which version of GCC to run.
-+This is useful when multiple versions are installed. For example,
-+@var{version} might be @samp{4.0}, meaning to run GCC version 4.0.
-+@end table
-+
-+The @option{-V} and @option{-b} options work by running the
-+@file{<machine>-gcc-<version>} executable, so there's no real reason to
-+use them if you can just run that directly.
-+
-+@node Submodel Options
-+@section Hardware Models and Configurations
-+@cindex submodel options
-+@cindex specifying hardware config
-+@cindex hardware models and configurations, specifying
-+@cindex machine dependent options
-+
-+Earlier we discussed the standard option @option{-b} which chooses among
-+different installed compilers for completely different target
-+machines, such as VAX vs.@: 68000 vs.@: 80386.
-+
-+In addition, each of these target machine types can have its own
-+special options, starting with @samp{-m}, to choose among various
-+hardware models or configurations---for example, 68010 vs 68020,
-+floating coprocessor or none. A single installed version of the
-+compiler can compile for any model or configuration, according to the
-+options specified.
-+
-+Some configurations of the compiler also support additional special
-+options, usually for compatibility with other compilers on the same
-+platform.
-+
-+@c This list is ordered alphanumerically by subsection name.
-+@c It should be the same order and spelling as these options are listed
-+@c in Machine Dependent Options
-+
-+@menu
-+* ARC Options::
-+* ARM Options::
-+* AVR Options::
-+* Blackfin Options::
-+* CRIS Options::
-+* CRX Options::
-+* Darwin Options::
-+* DEC Alpha Options::
-+* DEC Alpha/VMS Options::
-+* FR30 Options::
-+* FRV Options::
-+* GNU/Linux Options::
-+* H8/300 Options::
-+* HPPA Options::
-+* i386 and x86-64 Options::
-+* i386 and x86-64 Windows Options::
-+* IA-64 Options::
-+* M32C Options::
-+* M32R/D Options::
-+* M680x0 Options::
-+* M68hc1x Options::
-+* MCore Options::
-+* MIPS Options::
-+* MMIX Options::
-+* MN10300 Options::
-+* PDP-11 Options::
-+* picoChip Options::
-+* PowerPC Options::
-+* RS/6000 and PowerPC Options::
-+* S/390 and zSeries Options::
-+* Score Options::
-+* SH Options::
-+* SPARC Options::
-+* SPU Options::
-+* System V Options::
-+* V850 Options::
-+* VAX Options::
-+* VxWorks Options::
-+* x86-64 Options::
-+* Xstormy16 Options::
-+* Xtensa Options::
-+* zSeries Options::
-+@end menu
-+
-+@node ARC Options
-+@subsection ARC Options
-+@cindex ARC Options
-+
-+These options are defined for ARC implementations:
-+
-+@table @gcctabopt
-+@item -EL
-+@opindex EL
-+Compile code for little endian mode. This is the default.
-+
-+@item -EB
-+@opindex EB
-+Compile code for big endian mode.
-+
-+@item -mmangle-cpu
-+@opindex mmangle-cpu
-+Prepend the name of the cpu to all public symbol names.
-+In multiple-processor systems, there are many ARC variants with different
-+instruction and register set characteristics. This flag prevents code
-+compiled for one cpu to be linked with code compiled for another.
-+No facility exists for handling variants that are ``almost identical''.
-+This is an all or nothing option.
-+
-+@item -mcpu=@var{cpu}
-+@opindex mcpu
-+Compile code for ARC variant @var{cpu}.
-+Which variants are supported depend on the configuration.
-+All variants support @option{-mcpu=base}, this is the default.
-+
-+@item -mtext=@var{text-section}
-+@itemx -mdata=@var{data-section}
-+@itemx -mrodata=@var{readonly-data-section}
-+@opindex mtext
-+@opindex mdata
-+@opindex mrodata
-+Put functions, data, and readonly data in @var{text-section},
-+@var{data-section}, and @var{readonly-data-section} respectively
-+by default. This can be overridden with the @code{section} attribute.
-+@xref{Variable Attributes}.
-+
-+@item -mfix-cortex-m3-ldrd
-+@opindex mfix-cortex-m3-ldrd
-+Some Cortex-M3 cores can cause data corruption when @code{ldrd} instructions
-+with overlapping destination and base registers are used. This option avoids
-+generating these instructions. This option is enabled by default when
-+@option{-mcpu=cortex-m3} is specified.
-+
-+@end table
-+
-+@node ARM Options
-+@subsection ARM Options
-+@cindex ARM options
-+
-+These @samp{-m} options are defined for Advanced RISC Machines (ARM)
-+architectures:
-+
-+@table @gcctabopt
-+@item -mabi=@var{name}
-+@opindex mabi
-+Generate code for the specified ABI@. Permissible values are: @samp{apcs-gnu},
-+@samp{atpcs}, @samp{aapcs}, @samp{aapcs-linux} and @samp{iwmmxt}.
-+
-+@item -mapcs-frame
-+@opindex mapcs-frame
-+Generate a stack frame that is compliant with the ARM Procedure Call
-+Standard for all functions, even if this is not strictly necessary for
-+correct execution of the code. Specifying @option{-fomit-frame-pointer}
-+with this option will cause the stack frames not to be generated for
-+leaf functions. The default is @option{-mno-apcs-frame}.
-+
-+@item -mapcs
-+@opindex mapcs
-+This is a synonym for @option{-mapcs-frame}.
-+
-+@ignore
-+@c not currently implemented
-+@item -mapcs-stack-check
-+@opindex mapcs-stack-check
-+Generate code to check the amount of stack space available upon entry to
-+every function (that actually uses some stack space). If there is
-+insufficient space available then either the function
-+@samp{__rt_stkovf_split_small} or @samp{__rt_stkovf_split_big} will be
-+called, depending upon the amount of stack space required. The run time
-+system is required to provide these functions. The default is
-+@option{-mno-apcs-stack-check}, since this produces smaller code.
-+
-+@c not currently implemented
-+@item -mapcs-float
-+@opindex mapcs-float
-+Pass floating point arguments using the float point registers. This is
-+one of the variants of the APCS@. This option is recommended if the
-+target hardware has a floating point unit or if a lot of floating point
-+arithmetic is going to be performed by the code. The default is
-+@option{-mno-apcs-float}, since integer only code is slightly increased in
-+size if @option{-mapcs-float} is used.
-+
-+@c not currently implemented
-+@item -mapcs-reentrant
-+@opindex mapcs-reentrant
-+Generate reentrant, position independent code. The default is
-+@option{-mno-apcs-reentrant}.
-+@end ignore
-+
-+@item -mthumb-interwork
-+@opindex mthumb-interwork
-+Generate code which supports calling between the ARM and Thumb
-+instruction sets. Without this option the two instruction sets cannot
-+be reliably used inside one program. The default is
-+@option{-mno-thumb-interwork}, since slightly larger code is generated
-+when @option{-mthumb-interwork} is specified.
-+
-+@item -mno-sched-prolog
-+@opindex mno-sched-prolog
-+Prevent the reordering of instructions in the function prolog, or the
-+merging of those instruction with the instructions in the function's
-+body. This means that all functions will start with a recognizable set
-+of instructions (or in fact one of a choice from a small set of
-+different function prologues), and this information can be used to
-+locate the start if functions inside an executable piece of code. The
-+default is @option{-msched-prolog}.
-+
-+@item -mfloat-abi=@var{name}
-+@opindex mfloat-abi
-+Specifies which floating-point ABI to use. Permissible values
-+are: @samp{soft}, @samp{softfp} and @samp{hard}.
-+
-+Specifying @samp{soft} causes GCC to generate output containing
-+library calls for floating-point operations.
-+@samp{softfp} allows the generation of code using hardware floating-point
-+instructions, but still uses the soft-float calling conventions.
-+@samp{hard} allows generation of floating-point instructions
-+and uses FPU-specific calling conventions.
-+
-+Using @option{-mfloat-abi=hard} with VFP coprocessors is not supported.
-+Use @option{-mfloat-abi=softfp} with the appropriate @option{-mfpu} option
-+to allow the compiler to generate code that makes use of the hardware
-+floating-point capabilities for these CPUs.
-+
-+The default depends on the specific target configuration. Note that
-+the hard-float and soft-float ABIs are not link-compatible; you must
-+compile your entire program with the same ABI, and link with a
-+compatible set of libraries.
-+
-+@item -mhard-float
-+@opindex mhard-float
-+Equivalent to @option{-mfloat-abi=hard}.
-+
-+@item -msoft-float
-+@opindex msoft-float
-+Equivalent to @option{-mfloat-abi=soft}.
-+
-+@item -mlittle-endian
-+@opindex mlittle-endian
-+Generate code for a processor running in little-endian mode. This is
-+the default for all standard configurations.
-+
-+@item -mbig-endian
-+@opindex mbig-endian
-+Generate code for a processor running in big-endian mode; the default is
-+to compile code for a little-endian processor.
-+
-+@item -mwords-little-endian
-+@opindex mwords-little-endian
-+This option only applies when generating code for big-endian processors.
-+Generate code for a little-endian word order but a big-endian byte
-+order. That is, a byte order of the form @samp{32107654}. Note: this
-+option should only be used if you require compatibility with code for
-+big-endian ARM processors generated by versions of the compiler prior to
-+2.8.
-+
-+@item -mcpu=@var{name}
-+@opindex mcpu
-+This specifies the name of the target ARM processor. GCC uses this name
-+to determine what kind of instructions it can emit when generating
-+assembly code. Permissible names are: @samp{arm2}, @samp{arm250},
-+@samp{arm3}, @samp{arm6}, @samp{arm60}, @samp{arm600}, @samp{arm610},
-+@samp{arm620}, @samp{arm7}, @samp{arm7m}, @samp{arm7d}, @samp{arm7dm},
-+@samp{arm7di}, @samp{arm7dmi}, @samp{arm70}, @samp{arm700},
-+@samp{arm700i}, @samp{arm710}, @samp{arm710c}, @samp{arm7100},
-+@samp{arm720},
-+@samp{arm7500}, @samp{arm7500fe}, @samp{arm7tdmi}, @samp{arm7tdmi-s},
-+@samp{arm710t}, @samp{arm720t}, @samp{arm740t},
-+@samp{strongarm}, @samp{strongarm110}, @samp{strongarm1100},
-+@samp{strongarm1110},
-+@samp{arm8}, @samp{arm810}, @samp{arm9}, @samp{arm9e}, @samp{arm920},
-+@samp{arm920t}, @samp{arm922t}, @samp{arm946e-s}, @samp{arm966e-s},
-+@samp{arm968e-s}, @samp{arm926ej-s}, @samp{arm940t}, @samp{arm9tdmi},
-+@samp{arm10tdmi}, @samp{arm1020t}, @samp{arm1026ej-s},
-+@samp{arm10e}, @samp{arm1020e}, @samp{arm1022e},
-+@samp{arm1136j-s}, @samp{arm1136jf-s}, @samp{mpcore}, @samp{mpcorenovfp},
-+@samp{arm1156t2-s}, @samp{arm1176jz-s}, @samp{arm1176jzf-s},
-+@samp{cortex-a8}, @samp{cortex-a9},
-+@samp{cortex-r4}, @samp{cortex-r4f}, @samp{cortex-m3},
-+@samp{cortex-m1},
-+@samp{xscale}, @samp{iwmmxt}, @samp{iwmmxt2}, @samp{ep9312}.
-+
-+@item -mtune=@var{name}
-+@opindex mtune
-+This option is very similar to the @option{-mcpu=} option, except that
-+instead of specifying the actual target processor type, and hence
-+restricting which instructions can be used, it specifies that GCC should
-+tune the performance of the code as if the target were of the type
-+specified in this option, but still choosing the instructions that it
-+will generate based on the cpu specified by a @option{-mcpu=} option.
-+For some ARM implementations better performance can be obtained by using
-+this option.
-+
-+@item -march=@var{name}
-+@opindex march
-+This specifies the name of the target ARM architecture. GCC uses this
-+name to determine what kind of instructions it can emit when generating
-+assembly code. This option can be used in conjunction with or instead
-+of the @option{-mcpu=} option. Permissible names are: @samp{armv2},
-+@samp{armv2a}, @samp{armv3}, @samp{armv3m}, @samp{armv4}, @samp{armv4t},
-+@samp{armv5}, @samp{armv5t}, @samp{armv5e}, @samp{armv5te},
-+@samp{armv6}, @samp{armv6j},
-+@samp{armv6t2}, @samp{armv6z}, @samp{armv6zk}, @samp{armv6-m},
-+@samp{armv7}, @samp{armv7-a}, @samp{armv7-r}, @samp{armv7-m},
-+@samp{iwmmxt}, @samp{iwmmxt2}, @samp{ep9312}.
-+
-+@item -mfpu=@var{name}
-+@itemx -mfpe=@var{number}
-+@itemx -mfp=@var{number}
-+@opindex mfpu
-+@opindex mfpe
-+@opindex mfp
-+This specifies what floating point hardware (or hardware emulation) is
-+available on the target. Permissible names are: @samp{fpa}, @samp{fpe2},
-+@samp{fpe3}, @samp{maverick}, @samp{vfp}, @samp{vfpv3}, @samp{vfpv3-d16} and
-+@samp{neon}. @option{-mfp} and @option{-mfpe}
-+are synonyms for @option{-mfpu}=@samp{fpe}@var{number}, for compatibility
-+with older versions of GCC@.
-+
-+If @option{-msoft-float} is specified this specifies the format of
-+floating point values.
-+
-+@item -mstructure-size-boundary=@var{n}
-+@opindex mstructure-size-boundary
-+The size of all structures and unions will be rounded up to a multiple
-+of the number of bits set by this option. Permissible values are 8, 32
-+and 64. The default value varies for different toolchains. For the COFF
-+targeted toolchain the default value is 8. A value of 64 is only allowed
-+if the underlying ABI supports it.
-+
-+Specifying the larger number can produce faster, more efficient code, but
-+can also increase the size of the program. Different values are potentially
-+incompatible. Code compiled with one value cannot necessarily expect to
-+work with code or libraries compiled with another value, if they exchange
-+information using structures or unions.
-+
-+@item -mabort-on-noreturn
-+@opindex mabort-on-noreturn
-+Generate a call to the function @code{abort} at the end of a
-+@code{noreturn} function. It will be executed if the function tries to
-+return.
-+
-+@item -mlong-calls
-+@itemx -mno-long-calls
-+@opindex mlong-calls
-+@opindex mno-long-calls
-+Tells the compiler to perform function calls by first loading the
-+address of the function into a register and then performing a subroutine
-+call on this register. This switch is needed if the target function
-+will lie outside of the 64 megabyte addressing range of the offset based
-+version of subroutine call instruction.
-+
-+Even if this switch is enabled, not all function calls will be turned
-+into long calls. The heuristic is that static functions, functions
-+which have the @samp{short-call} attribute, functions that are inside
-+the scope of a @samp{#pragma no_long_calls} directive and functions whose
-+definitions have already been compiled within the current compilation
-+unit, will not be turned into long calls. The exception to this rule is
-+that weak function definitions, functions with the @samp{long-call}
-+attribute or the @samp{section} attribute, and functions that are within
-+the scope of a @samp{#pragma long_calls} directive, will always be
-+turned into long calls.
-+
-+This feature is not enabled by default. Specifying
-+@option{-mno-long-calls} will restore the default behavior, as will
-+placing the function calls within the scope of a @samp{#pragma
-+long_calls_off} directive. Note these switches have no effect on how
-+the compiler generates code to handle function calls via function
-+pointers.
-+
-+@item -msingle-pic-base
-+@opindex msingle-pic-base
-+Treat the register used for PIC addressing as read-only, rather than
-+loading it in the prologue for each function. The run-time system is
-+responsible for initializing this register with an appropriate value
-+before execution begins.
-+
-+@item -mpic-register=@var{reg}
-+@opindex mpic-register
-+Specify the register to be used for PIC addressing. The default is R10
-+unless stack-checking is enabled, when R9 is used.
-+
-+@item -mcirrus-fix-invalid-insns
-+@opindex mcirrus-fix-invalid-insns
-+@opindex mno-cirrus-fix-invalid-insns
-+Insert NOPs into the instruction stream to in order to work around
-+problems with invalid Maverick instruction combinations. This option
-+is only valid if the @option{-mcpu=ep9312} option has been used to
-+enable generation of instructions for the Cirrus Maverick floating
-+point co-processor. This option is not enabled by default, since the
-+problem is only present in older Maverick implementations. The default
-+can be re-enabled by use of the @option{-mno-cirrus-fix-invalid-insns}
-+switch.
-+
-+@item -mpoke-function-name
-+@opindex mpoke-function-name
-+Write the name of each function into the text section, directly
-+preceding the function prologue. The generated code is similar to this:
-+
-+@smallexample
-+ t0
-+ .ascii "arm_poke_function_name", 0
-+ .align
-+ t1
-+ .word 0xff000000 + (t1 - t0)
-+ arm_poke_function_name
-+ mov ip, sp
-+ stmfd sp!, @{fp, ip, lr, pc@}
-+ sub fp, ip, #4
-+@end smallexample
-+
-+When performing a stack backtrace, code can inspect the value of
-+@code{pc} stored at @code{fp + 0}. If the trace function then looks at
-+location @code{pc - 12} and the top 8 bits are set, then we know that
-+there is a function name embedded immediately preceding this location
-+and has length @code{((pc[-3]) & 0xff000000)}.
-+
-+@item -mthumb
-+@opindex mthumb
-+Generate code for the Thumb instruction set. The default is to
-+use the 32-bit ARM instruction set.
-+This option automatically enables either 16-bit Thumb-1 or
-+mixed 16/32-bit Thumb-2 instructions based on the @option{-mcpu=@var{name}}
-+and @option{-march=@var{name}} options.
-+
-+@item -mtpcs-frame
-+@opindex mtpcs-frame
-+Generate a stack frame that is compliant with the Thumb Procedure Call
-+Standard for all non-leaf functions. (A leaf function is one that does
-+not call any other functions.) The default is @option{-mno-tpcs-frame}.
-+
-+@item -mtpcs-leaf-frame
-+@opindex mtpcs-leaf-frame
-+Generate a stack frame that is compliant with the Thumb Procedure Call
-+Standard for all leaf functions. (A leaf function is one that does
-+not call any other functions.) The default is @option{-mno-apcs-leaf-frame}.
-+
-+@item -mcallee-super-interworking
-+@opindex mcallee-super-interworking
-+Gives all externally visible functions in the file being compiled an ARM
-+instruction set header which switches to Thumb mode before executing the
-+rest of the function. This allows these functions to be called from
-+non-interworking code.
-+
-+@item -mcaller-super-interworking
-+@opindex mcaller-super-interworking
-+Allows calls via function pointers (including virtual functions) to
-+execute correctly regardless of whether the target code has been
-+compiled for interworking or not. There is a small overhead in the cost
-+of executing a function pointer if this option is enabled.
-+
-+@item -mtp=@var{name}
-+@opindex mtp
-+Specify the access model for the thread local storage pointer. The valid
-+models are @option{soft}, which generates calls to @code{__aeabi_read_tp},
-+@option{cp15}, which fetches the thread pointer from @code{cp15} directly
-+(supported in the arm6k architecture), and @option{auto}, which uses the
-+best available method for the selected processor. The default setting is
-+@option{auto}.
-+
-+@item -mword-relocations
-+@opindex mword-relocations
-+Only generate absolute relocations on word sized values (i.e. R_ARM_ABS32).
-+This is enabled by default on targets (uClinux, SymbianOS) where the runtime
-+loader imposes this restriction, and when @option{-fpic} or @option{-fPIC}
-+is specified.
-+
-+@end table
-+
-+@node AVR Options
-+@subsection AVR Options
-+@cindex AVR Options
-+
-+These options are defined for AVR implementations:
-+
-+@table @gcctabopt
-+@item -mmcu=@var{mcu}
-+@opindex mmcu
-+Specify ATMEL AVR instruction set or MCU type.
-+
-+Instruction set avr1 is for the minimal AVR core, not supported by the C
-+compiler, only for assembler programs (MCU types: at90s1200, attiny10,
-+attiny11, attiny12, attiny15, attiny28).
-+
-+Instruction set avr2 (default) is for the classic AVR core with up to
-+8K program memory space (MCU types: at90s2313, at90s2323, attiny22,
-+at90s2333, at90s2343, at90s4414, at90s4433, at90s4434, at90s8515,
-+at90c8534, at90s8535).
-+
-+Instruction set avr3 is for the classic AVR core with up to 128K program
-+memory space (MCU types: atmega103, atmega603, at43usb320, at76c711).
-+
-+Instruction set avr4 is for the enhanced AVR core with up to 8K program
-+memory space (MCU types: atmega8, atmega83, atmega85).
-+
-+Instruction set avr5 is for the enhanced AVR core with up to 128K program
-+memory space (MCU types: atmega16, atmega161, atmega163, atmega32, atmega323,
-+atmega64, atmega128, at43usb355, at94k).
-+
-+@item -msize
-+@opindex msize
-+Output instruction sizes to the asm file.
-+
-+@item -mno-interrupts
-+@opindex mno-interrupts
-+Generated code is not compatible with hardware interrupts.
-+Code size will be smaller.
-+
-+@item -mcall-prologues
-+@opindex mcall-prologues
-+Functions prologues/epilogues expanded as call to appropriate
-+subroutines. Code size will be smaller.
-+
-+@item -mno-tablejump
-+@opindex mno-tablejump
-+Do not generate tablejump insns which sometimes increase code size.
-+The option is now deprecated in favor of the equivalent
-+@option{-fno-jump-tables}
-+
-+@item -mtiny-stack
-+@opindex mtiny-stack
-+Change only the low 8 bits of the stack pointer.
-+
-+@item -mint8
-+@opindex mint8
-+Assume int to be 8 bit integer. This affects the sizes of all types: A
-+char will be 1 byte, an int will be 1 byte, an long will be 2 bytes
-+and long long will be 4 bytes. Please note that this option does not
-+comply to the C standards, but it will provide you with smaller code
-+size.
-+@end table
-+
-+@node Blackfin Options
-+@subsection Blackfin Options
-+@cindex Blackfin Options
-+
-+@table @gcctabopt
-+@item -mcpu=@var{cpu}@r{[}-@var{sirevision}@r{]}
-+@opindex mcpu=
-+Specifies the name of the target Blackfin processor. Currently, @var{cpu}
-+can be one of @samp{bf512}, @samp{bf514}, @samp{bf516}, @samp{bf518},
-+@samp{bf522}, @samp{bf523}, @samp{bf524}, @samp{bf525}, @samp{bf526},
-+@samp{bf527}, @samp{bf531}, @samp{bf532}, @samp{bf533},
-+@samp{bf534}, @samp{bf536}, @samp{bf537}, @samp{bf538}, @samp{bf539},
-+@samp{bf542}, @samp{bf544}, @samp{bf547}, @samp{bf548}, @samp{bf549},
-+@samp{bf561}.
-+The optional @var{sirevision} specifies the silicon revision of the target
-+Blackfin processor. Any workarounds available for the targeted silicon revision
-+will be enabled. If @var{sirevision} is @samp{none}, no workarounds are enabled.
-+If @var{sirevision} is @samp{any}, all workarounds for the targeted processor
-+will be enabled. The @code{__SILICON_REVISION__} macro is defined to two
-+hexadecimal digits representing the major and minor numbers in the silicon
-+revision. If @var{sirevision} is @samp{none}, the @code{__SILICON_REVISION__}
-+is not defined. If @var{sirevision} is @samp{any}, the
-+@code{__SILICON_REVISION__} is defined to be @code{0xffff}.
-+If this optional @var{sirevision} is not used, GCC assumes the latest known
-+silicon revision of the targeted Blackfin processor.
-+
-+Support for @samp{bf561} is incomplete. For @samp{bf561},
-+Only the processor macro is defined.
-+Without this option, @samp{bf532} is used as the processor by default.
-+The corresponding predefined processor macros for @var{cpu} is to
-+be defined. And for @samp{bfin-elf} toolchain, this causes the hardware BSP
-+provided by libgloss to be linked in if @option{-msim} is not given.
-+
-+@item -msim
-+@opindex msim
-+Specifies that the program will be run on the simulator. This causes
-+the simulator BSP provided by libgloss to be linked in. This option
-+has effect only for @samp{bfin-elf} toolchain.
-+Certain other options, such as @option{-mid-shared-library} and
-+@option{-mfdpic}, imply @option{-msim}.
-+
-+@item -momit-leaf-frame-pointer
-+@opindex momit-leaf-frame-pointer
-+Don't keep the frame pointer in a register for leaf functions. This
-+avoids the instructions to save, set up and restore frame pointers and
-+makes an extra register available in leaf functions. The option
-+@option{-fomit-frame-pointer} removes the frame pointer for all functions
-+which might make debugging harder.
-+
-+@item -mspecld-anomaly
-+@opindex mspecld-anomaly
-+When enabled, the compiler will ensure that the generated code does not
-+contain speculative loads after jump instructions. If this option is used,
-+@code{__WORKAROUND_SPECULATIVE_LOADS} is defined.
-+
-+@item -mno-specld-anomaly
-+@opindex mno-specld-anomaly
-+Don't generate extra code to prevent speculative loads from occurring.
-+
-+@item -mcsync-anomaly
-+@opindex mcsync-anomaly
-+When enabled, the compiler will ensure that the generated code does not
-+contain CSYNC or SSYNC instructions too soon after conditional branches.
-+If this option is used, @code{__WORKAROUND_SPECULATIVE_SYNCS} is defined.
-+
-+@item -mno-csync-anomaly
-+@opindex mno-csync-anomaly
-+Don't generate extra code to prevent CSYNC or SSYNC instructions from
-+occurring too soon after a conditional branch.
-+
-+@item -mlow-64k
-+@opindex mlow-64k
-+When enabled, the compiler is free to take advantage of the knowledge that
-+the entire program fits into the low 64k of memory.
-+
-+@item -mno-low-64k
-+@opindex mno-low-64k
-+Assume that the program is arbitrarily large. This is the default.
-+
-+@item -mstack-check-l1
-+@opindex mstack-check-l1
-+Do stack checking using information placed into L1 scratchpad memory by the
-+uClinux kernel.
-+
-+@item -mid-shared-library
-+@opindex mid-shared-library
-+Generate code that supports shared libraries via the library ID method.
-+This allows for execute in place and shared libraries in an environment
-+without virtual memory management. This option implies @option{-fPIC}.
-+With a @samp{bfin-elf} target, this option implies @option{-msim}.
-+
-+@item -mno-id-shared-library
-+@opindex mno-id-shared-library
-+Generate code that doesn't assume ID based shared libraries are being used.
-+This is the default.
-+
-+@item -mleaf-id-shared-library
-+@opindex mleaf-id-shared-library
-+Generate code that supports shared libraries via the library ID method,
-+but assumes that this library or executable won't link against any other
-+ID shared libraries. That allows the compiler to use faster code for jumps
-+and calls.
-+
-+@item -mno-leaf-id-shared-library
-+@opindex mno-leaf-id-shared-library
-+Do not assume that the code being compiled won't link against any ID shared
-+libraries. Slower code will be generated for jump and call insns.
-+
-+@item -mshared-library-id=n
-+@opindex mshared-library-id
-+Specified the identification number of the ID based shared library being
-+compiled. Specifying a value of 0 will generate more compact code, specifying
-+other values will force the allocation of that number to the current
-+library but is no more space or time efficient than omitting this option.
-+
-+@item -msep-data
-+@opindex msep-data
-+Generate code that allows the data segment to be located in a different
-+area of memory from the text segment. This allows for execute in place in
-+an environment without virtual memory management by eliminating relocations
-+against the text section.
-+
-+@item -mno-sep-data
-+@opindex mno-sep-data
-+Generate code that assumes that the data segment follows the text segment.
-+This is the default.
-+
-+@item -mlong-calls
-+@itemx -mno-long-calls
-+@opindex mlong-calls
-+@opindex mno-long-calls
-+Tells the compiler to perform function calls by first loading the
-+address of the function into a register and then performing a subroutine
-+call on this register. This switch is needed if the target function
-+will lie outside of the 24 bit addressing range of the offset based
-+version of subroutine call instruction.
-+
-+This feature is not enabled by default. Specifying
-+@option{-mno-long-calls} will restore the default behavior. Note these
-+switches have no effect on how the compiler generates code to handle
-+function calls via function pointers.
-+
-+@item -mfast-fp
-+@opindex mfast-fp
-+Link with the fast floating-point library. This library relaxes some of
-+the IEEE floating-point standard's rules for checking inputs against
-+Not-a-Number (NAN), in the interest of performance.
-+
-+@item -minline-plt
-+@opindex minline-plt
-+Enable inlining of PLT entries in function calls to functions that are
-+not known to bind locally. It has no effect without @option{-mfdpic}.
-+
-+@item -mmulticore
-+@opindex mmulticore
-+Build standalone application for multicore Blackfin processor. Proper
-+start files and link scripts will be used to support multicore.
-+This option defines @code{__BFIN_MULTICORE}. It can only be used with
-+@option{-mcpu=bf561@r{[}-@var{sirevision}@r{]}}. It can be used with
-+@option{-mcorea} or @option{-mcoreb}. If it's used without
-+@option{-mcorea} or @option{-mcoreb}, single application/dual core
-+programming model is used. In this model, the main function of Core B
-+should be named as coreb_main. If it's used with @option{-mcorea} or
-+@option{-mcoreb}, one application per core programming model is used.
-+If this option is not used, single core application programming
-+model is used.
-+
-+@item -mcorea
-+@opindex mcorea
-+Build standalone application for Core A of BF561 when using
-+one application per core programming model. Proper start files
-+and link scripts will be used to support Core A. This option
-+defines @code{__BFIN_COREA}. It must be used with @option{-mmulticore}.
-+
-+@item -mcoreb
-+@opindex mcoreb
-+Build standalone application for Core B of BF561 when using
-+one application per core programming model. Proper start files
-+and link scripts will be used to support Core B. This option
-+defines @code{__BFIN_COREB}. When this option is used, coreb_main
-+should be used instead of main. It must be used with
-+@option{-mmulticore}.
-+
-+@item -msdram
-+@opindex msdram
-+Build standalone application for SDRAM. Proper start files and
-+link scripts will be used to put the application into SDRAM.
-+Loader should initialize SDRAM before loading the application
-+into SDRAM. This option defines @code{__BFIN_SDRAM}.
-+
-+@item -micplb
-+@opindex micplb
-+Assume that ICPLBs are enabled at runtime. This has an effect on certain
-+anomaly workarounds. For Linux targets, the default is to assume ICPLBs
-+are enabled; for standalone applications the default is off.
-+@end table
-+
-+@node CRIS Options
-+@subsection CRIS Options
-+@cindex CRIS Options
-+
-+These options are defined specifically for the CRIS ports.
-+
-+@table @gcctabopt
-+@item -march=@var{architecture-type}
-+@itemx -mcpu=@var{architecture-type}
-+@opindex march
-+@opindex mcpu
-+Generate code for the specified architecture. The choices for
-+@var{architecture-type} are @samp{v3}, @samp{v8} and @samp{v10} for
-+respectively ETRAX@w{ }4, ETRAX@w{ }100, and ETRAX@w{ }100@w{ }LX@.
-+Default is @samp{v0} except for cris-axis-linux-gnu, where the default is
-+@samp{v10}.
-+
-+@item -mtune=@var{architecture-type}
-+@opindex mtune
-+Tune to @var{architecture-type} everything applicable about the generated
-+code, except for the ABI and the set of available instructions. The
-+choices for @var{architecture-type} are the same as for
-+@option{-march=@var{architecture-type}}.
-+
-+@item -mmax-stack-frame=@var{n}
-+@opindex mmax-stack-frame
-+Warn when the stack frame of a function exceeds @var{n} bytes.
-+
-+@item -metrax4
-+@itemx -metrax100
-+@opindex metrax4
-+@opindex metrax100
-+The options @option{-metrax4} and @option{-metrax100} are synonyms for
-+@option{-march=v3} and @option{-march=v8} respectively.
-+
-+@item -mmul-bug-workaround
-+@itemx -mno-mul-bug-workaround
-+@opindex mmul-bug-workaround
-+@opindex mno-mul-bug-workaround
-+Work around a bug in the @code{muls} and @code{mulu} instructions for CPU
-+models where it applies. This option is active by default.
-+
-+@item -mpdebug
-+@opindex mpdebug
-+Enable CRIS-specific verbose debug-related information in the assembly
-+code. This option also has the effect to turn off the @samp{#NO_APP}
-+formatted-code indicator to the assembler at the beginning of the
-+assembly file.
-+
-+@item -mcc-init
-+@opindex mcc-init
-+Do not use condition-code results from previous instruction; always emit
-+compare and test instructions before use of condition codes.
-+
-+@item -mno-side-effects
-+@opindex mno-side-effects
-+Do not emit instructions with side-effects in addressing modes other than
-+post-increment.
-+
-+@item -mstack-align
-+@itemx -mno-stack-align
-+@itemx -mdata-align
-+@itemx -mno-data-align
-+@itemx -mconst-align
-+@itemx -mno-const-align
-+@opindex mstack-align
-+@opindex mno-stack-align
-+@opindex mdata-align
-+@opindex mno-data-align
-+@opindex mconst-align
-+@opindex mno-const-align
-+These options (no-options) arranges (eliminate arrangements) for the
-+stack-frame, individual data and constants to be aligned for the maximum
-+single data access size for the chosen CPU model. The default is to
-+arrange for 32-bit alignment. ABI details such as structure layout are
-+not affected by these options.
-+
-+@item -m32-bit
-+@itemx -m16-bit
-+@itemx -m8-bit
-+@opindex m32-bit
-+@opindex m16-bit
-+@opindex m8-bit
-+Similar to the stack- data- and const-align options above, these options
-+arrange for stack-frame, writable data and constants to all be 32-bit,
-+16-bit or 8-bit aligned. The default is 32-bit alignment.
-+
-+@item -mno-prologue-epilogue
-+@itemx -mprologue-epilogue
-+@opindex mno-prologue-epilogue
-+@opindex mprologue-epilogue
-+With @option{-mno-prologue-epilogue}, the normal function prologue and
-+epilogue that sets up the stack-frame are omitted and no return
-+instructions or return sequences are generated in the code. Use this
-+option only together with visual inspection of the compiled code: no
-+warnings or errors are generated when call-saved registers must be saved,
-+or storage for local variable needs to be allocated.
-+
-+@item -mno-gotplt
-+@itemx -mgotplt
-+@opindex mno-gotplt
-+@opindex mgotplt
-+With @option{-fpic} and @option{-fPIC}, don't generate (do generate)
-+instruction sequences that load addresses for functions from the PLT part
-+of the GOT rather than (traditional on other architectures) calls to the
-+PLT@. The default is @option{-mgotplt}.
-+
-+@item -melf
-+@opindex melf
-+Legacy no-op option only recognized with the cris-axis-elf and
-+cris-axis-linux-gnu targets.
-+
-+@item -mlinux
-+@opindex mlinux
-+Legacy no-op option only recognized with the cris-axis-linux-gnu target.
-+
-+@item -sim
-+@opindex sim
-+This option, recognized for the cris-axis-elf arranges
-+to link with input-output functions from a simulator library. Code,
-+initialized data and zero-initialized data are allocated consecutively.
-+
-+@item -sim2
-+@opindex sim2
-+Like @option{-sim}, but pass linker options to locate initialized data at
-+0x40000000 and zero-initialized data at 0x80000000.
-+@end table
-+
-+@node CRX Options
-+@subsection CRX Options
-+@cindex CRX Options
-+
-+These options are defined specifically for the CRX ports.
-+
-+@table @gcctabopt
-+
-+@item -mmac
-+@opindex mmac
-+Enable the use of multiply-accumulate instructions. Disabled by default.
-+
-+@item -mpush-args
-+@opindex mpush-args
-+Push instructions will be used to pass outgoing arguments when functions
-+are called. Enabled by default.
-+@end table
-+
-+@node Darwin Options
-+@subsection Darwin Options
-+@cindex Darwin options
-+
-+These options are defined for all architectures running the Darwin operating
-+system.
-+
-+FSF GCC on Darwin does not create ``fat'' object files; it will create
-+an object file for the single architecture that it was built to
-+target. Apple's GCC on Darwin does create ``fat'' files if multiple
-+@option{-arch} options are used; it does so by running the compiler or
-+linker multiple times and joining the results together with
-+@file{lipo}.
-+
-+The subtype of the file created (like @samp{ppc7400} or @samp{ppc970} or
-+@samp{i686}) is determined by the flags that specify the ISA
-+that GCC is targetting, like @option{-mcpu} or @option{-march}. The
-+@option{-force_cpusubtype_ALL} option can be used to override this.
-+
-+The Darwin tools vary in their behavior when presented with an ISA
-+mismatch. The assembler, @file{as}, will only permit instructions to
-+be used that are valid for the subtype of the file it is generating,
-+so you cannot put 64-bit instructions in an @samp{ppc750} object file.
-+The linker for shared libraries, @file{/usr/bin/libtool}, will fail
-+and print an error if asked to create a shared library with a less
-+restrictive subtype than its input files (for instance, trying to put
-+a @samp{ppc970} object file in a @samp{ppc7400} library). The linker
-+for executables, @file{ld}, will quietly give the executable the most
-+restrictive subtype of any of its input files.
-+
-+@table @gcctabopt
-+@item -F@var{dir}
-+@opindex F
-+Add the framework directory @var{dir} to the head of the list of
-+directories to be searched for header files. These directories are
-+interleaved with those specified by @option{-I} options and are
-+scanned in a left-to-right order.
-+
-+A framework directory is a directory with frameworks in it. A
-+framework is a directory with a @samp{"Headers"} and/or
-+@samp{"PrivateHeaders"} directory contained directly in it that ends
-+in @samp{".framework"}. The name of a framework is the name of this
-+directory excluding the @samp{".framework"}. Headers associated with
-+the framework are found in one of those two directories, with
-+@samp{"Headers"} being searched first. A subframework is a framework
-+directory that is in a framework's @samp{"Frameworks"} directory.
-+Includes of subframework headers can only appear in a header of a
-+framework that contains the subframework, or in a sibling subframework
-+header. Two subframeworks are siblings if they occur in the same
-+framework. A subframework should not have the same name as a
-+framework, a warning will be issued if this is violated. Currently a
-+subframework cannot have subframeworks, in the future, the mechanism
-+may be extended to support this. The standard frameworks can be found
-+in @samp{"/System/Library/Frameworks"} and
-+@samp{"/Library/Frameworks"}. An example include looks like
-+@code{#include <Framework/header.h>}, where @samp{Framework} denotes
-+the name of the framework and header.h is found in the
-+@samp{"PrivateHeaders"} or @samp{"Headers"} directory.
-+
-+@item -iframework@var{dir}
-+@opindex iframework
-+Like @option{-F} except the directory is a treated as a system
-+directory. The main difference between this @option{-iframework} and
-+@option{-F} is that with @option{-iframework} the compiler does not
-+warn about constructs contained within header files found via
-+@var{dir}. This option is valid only for the C family of languages.
-+
-+@item -gused
-+@opindex gused
-+Emit debugging information for symbols that are used. For STABS
-+debugging format, this enables @option{-feliminate-unused-debug-symbols}.
-+This is by default ON@.
-+
-+@item -gfull
-+@opindex gfull
-+Emit debugging information for all symbols and types.
-+
-+@item -mmacosx-version-min=@var{version}
-+The earliest version of MacOS X that this executable will run on
-+is @var{version}. Typical values of @var{version} include @code{10.1},
-+@code{10.2}, and @code{10.3.9}.
-+
-+If the compiler was built to use the system's headers by default,
-+then the default for this option is the system version on which the
-+compiler is running, otherwise the default is to make choices which
-+are compatible with as many systems and code bases as possible.
-+
-+@item -mkernel
-+@opindex mkernel
-+Enable kernel development mode. The @option{-mkernel} option sets
-+@option{-static}, @option{-fno-common}, @option{-fno-cxa-atexit},
-+@option{-fno-exceptions}, @option{-fno-non-call-exceptions},
-+@option{-fapple-kext}, @option{-fno-weak} and @option{-fno-rtti} where
-+applicable. This mode also sets @option{-mno-altivec},
-+@option{-msoft-float}, @option{-fno-builtin} and
-+@option{-mlong-branch} for PowerPC targets.
-+
-+@item -mone-byte-bool
-+@opindex mone-byte-bool
-+Override the defaults for @samp{bool} so that @samp{sizeof(bool)==1}.
-+By default @samp{sizeof(bool)} is @samp{4} when compiling for
-+Darwin/PowerPC and @samp{1} when compiling for Darwin/x86, so this
-+option has no effect on x86.
-+
-+@strong{Warning:} The @option{-mone-byte-bool} switch causes GCC
-+to generate code that is not binary compatible with code generated
-+without that switch. Using this switch may require recompiling all
-+other modules in a program, including system libraries. Use this
-+switch to conform to a non-default data model.
-+
-+@item -mfix-and-continue
-+@itemx -ffix-and-continue
-+@itemx -findirect-data
-+@opindex mfix-and-continue
-+@opindex ffix-and-continue
-+@opindex findirect-data
-+Generate code suitable for fast turn around development. Needed to
-+enable gdb to dynamically load @code{.o} files into already running
-+programs. @option{-findirect-data} and @option{-ffix-and-continue}
-+are provided for backwards compatibility.
-+
-+@item -all_load
-+@opindex all_load
-+Loads all members of static archive libraries.
-+See man ld(1) for more information.
-+
-+@item -arch_errors_fatal
-+@opindex arch_errors_fatal
-+Cause the errors having to do with files that have the wrong architecture
-+to be fatal.
-+
-+@item -bind_at_load
-+@opindex bind_at_load
-+Causes the output file to be marked such that the dynamic linker will
-+bind all undefined references when the file is loaded or launched.
-+
-+@item -bundle
-+@opindex bundle
-+Produce a Mach-o bundle format file.
-+See man ld(1) for more information.
-+
-+@item -bundle_loader @var{executable}
-+@opindex bundle_loader
-+This option specifies the @var{executable} that will be loading the build
-+output file being linked. See man ld(1) for more information.
-+
-+@item -dynamiclib
-+@opindex dynamiclib
-+When passed this option, GCC will produce a dynamic library instead of
-+an executable when linking, using the Darwin @file{libtool} command.
-+
-+@item -force_cpusubtype_ALL
-+@opindex force_cpusubtype_ALL
-+This causes GCC's output file to have the @var{ALL} subtype, instead of
-+one controlled by the @option{-mcpu} or @option{-march} option.
-+
-+@item -allowable_client @var{client_name}
-+@itemx -client_name
-+@itemx -compatibility_version
-+@itemx -current_version
-+@itemx -dead_strip
-+@itemx -dependency-file
-+@itemx -dylib_file
-+@itemx -dylinker_install_name
-+@itemx -dynamic
-+@itemx -exported_symbols_list
-+@itemx -filelist
-+@itemx -flat_namespace
-+@itemx -force_flat_namespace
-+@itemx -headerpad_max_install_names
-+@itemx -image_base
-+@itemx -init
-+@itemx -install_name
-+@itemx -keep_private_externs
-+@itemx -multi_module
-+@itemx -multiply_defined
-+@itemx -multiply_defined_unused
-+@itemx -noall_load
-+@itemx -no_dead_strip_inits_and_terms
-+@itemx -nofixprebinding
-+@itemx -nomultidefs
-+@itemx -noprebind
-+@itemx -noseglinkedit
-+@itemx -pagezero_size
-+@itemx -prebind
-+@itemx -prebind_all_twolevel_modules
-+@itemx -private_bundle
-+@itemx -read_only_relocs
-+@itemx -sectalign
-+@itemx -sectobjectsymbols
-+@itemx -whyload
-+@itemx -seg1addr
-+@itemx -sectcreate
-+@itemx -sectobjectsymbols
-+@itemx -sectorder
-+@itemx -segaddr
-+@itemx -segs_read_only_addr
-+@itemx -segs_read_write_addr
-+@itemx -seg_addr_table
-+@itemx -seg_addr_table_filename
-+@itemx -seglinkedit
-+@itemx -segprot
-+@itemx -segs_read_only_addr
-+@itemx -segs_read_write_addr
-+@itemx -single_module
-+@itemx -static
-+@itemx -sub_library
-+@itemx -sub_umbrella
-+@itemx -twolevel_namespace
-+@itemx -umbrella
-+@itemx -undefined
-+@itemx -unexported_symbols_list
-+@itemx -weak_reference_mismatches
-+@itemx -whatsloaded
-+@opindex allowable_client
-+@opindex client_name
-+@opindex compatibility_version
-+@opindex current_version
-+@opindex dead_strip
-+@opindex dependency-file
-+@opindex dylib_file
-+@opindex dylinker_install_name
-+@opindex dynamic
-+@opindex exported_symbols_list
-+@opindex filelist
-+@opindex flat_namespace
-+@opindex force_flat_namespace
-+@opindex headerpad_max_install_names
-+@opindex image_base
-+@opindex init
-+@opindex install_name
-+@opindex keep_private_externs
-+@opindex multi_module
-+@opindex multiply_defined
-+@opindex multiply_defined_unused
-+@opindex noall_load
-+@opindex no_dead_strip_inits_and_terms
-+@opindex nofixprebinding
-+@opindex nomultidefs
-+@opindex noprebind
-+@opindex noseglinkedit
-+@opindex pagezero_size
-+@opindex prebind
-+@opindex prebind_all_twolevel_modules
-+@opindex private_bundle
-+@opindex read_only_relocs
-+@opindex sectalign
-+@opindex sectobjectsymbols
-+@opindex whyload
-+@opindex seg1addr
-+@opindex sectcreate
-+@opindex sectobjectsymbols
-+@opindex sectorder
-+@opindex segaddr
-+@opindex segs_read_only_addr
-+@opindex segs_read_write_addr
-+@opindex seg_addr_table
-+@opindex seg_addr_table_filename
-+@opindex seglinkedit
-+@opindex segprot
-+@opindex segs_read_only_addr
-+@opindex segs_read_write_addr
-+@opindex single_module
-+@opindex static
-+@opindex sub_library
-+@opindex sub_umbrella
-+@opindex twolevel_namespace
-+@opindex umbrella
-+@opindex undefined
-+@opindex unexported_symbols_list
-+@opindex weak_reference_mismatches
-+@opindex whatsloaded
-+These options are passed to the Darwin linker. The Darwin linker man page
-+describes them in detail.
-+@end table
-+
-+@node DEC Alpha Options
-+@subsection DEC Alpha Options
-+
-+These @samp{-m} options are defined for the DEC Alpha implementations:
-+
-+@table @gcctabopt
-+@item -mno-soft-float
-+@itemx -msoft-float
-+@opindex mno-soft-float
-+@opindex msoft-float
-+Use (do not use) the hardware floating-point instructions for
-+floating-point operations. When @option{-msoft-float} is specified,
-+functions in @file{libgcc.a} will be used to perform floating-point
-+operations. Unless they are replaced by routines that emulate the
-+floating-point operations, or compiled in such a way as to call such
-+emulations routines, these routines will issue floating-point
-+operations. If you are compiling for an Alpha without floating-point
-+operations, you must ensure that the library is built so as not to call
-+them.
-+
-+Note that Alpha implementations without floating-point operations are
-+required to have floating-point registers.
-+
-+@item -mfp-reg
-+@itemx -mno-fp-regs
-+@opindex mfp-reg
-+@opindex mno-fp-regs
-+Generate code that uses (does not use) the floating-point register set.
-+@option{-mno-fp-regs} implies @option{-msoft-float}. If the floating-point
-+register set is not used, floating point operands are passed in integer
-+registers as if they were integers and floating-point results are passed
-+in @code{$0} instead of @code{$f0}. This is a non-standard calling sequence,
-+so any function with a floating-point argument or return value called by code
-+compiled with @option{-mno-fp-regs} must also be compiled with that
-+option.
-+
-+A typical use of this option is building a kernel that does not use,
-+and hence need not save and restore, any floating-point registers.
-+
-+@item -mieee
-+@opindex mieee
-+The Alpha architecture implements floating-point hardware optimized for
-+maximum performance. It is mostly compliant with the IEEE floating
-+point standard. However, for full compliance, software assistance is
-+required. This option generates code fully IEEE compliant code
-+@emph{except} that the @var{inexact-flag} is not maintained (see below).
-+If this option is turned on, the preprocessor macro @code{_IEEE_FP} is
-+defined during compilation. The resulting code is less efficient but is
-+able to correctly support denormalized numbers and exceptional IEEE
-+values such as not-a-number and plus/minus infinity. Other Alpha
-+compilers call this option @option{-ieee_with_no_inexact}.
-+
-+@item -mieee-with-inexact
-+@opindex mieee-with-inexact
-+This is like @option{-mieee} except the generated code also maintains
-+the IEEE @var{inexact-flag}. Turning on this option causes the
-+generated code to implement fully-compliant IEEE math. In addition to
-+@code{_IEEE_FP}, @code{_IEEE_FP_EXACT} is defined as a preprocessor
-+macro. On some Alpha implementations the resulting code may execute
-+significantly slower than the code generated by default. Since there is
-+very little code that depends on the @var{inexact-flag}, you should
-+normally not specify this option. Other Alpha compilers call this
-+option @option{-ieee_with_inexact}.
-+
-+@item -mfp-trap-mode=@var{trap-mode}
-+@opindex mfp-trap-mode
-+This option controls what floating-point related traps are enabled.
-+Other Alpha compilers call this option @option{-fptm @var{trap-mode}}.
-+The trap mode can be set to one of four values:
-+
-+@table @samp
-+@item n
-+This is the default (normal) setting. The only traps that are enabled
-+are the ones that cannot be disabled in software (e.g., division by zero
-+trap).
-+
-+@item u
-+In addition to the traps enabled by @samp{n}, underflow traps are enabled
-+as well.
-+
-+@item su
-+Like @samp{u}, but the instructions are marked to be safe for software
-+completion (see Alpha architecture manual for details).
-+
-+@item sui
-+Like @samp{su}, but inexact traps are enabled as well.
-+@end table
-+
-+@item -mfp-rounding-mode=@var{rounding-mode}
-+@opindex mfp-rounding-mode
-+Selects the IEEE rounding mode. Other Alpha compilers call this option
-+@option{-fprm @var{rounding-mode}}. The @var{rounding-mode} can be one
-+of:
-+
-+@table @samp
-+@item n
-+Normal IEEE rounding mode. Floating point numbers are rounded towards
-+the nearest machine number or towards the even machine number in case
-+of a tie.
-+
-+@item m
-+Round towards minus infinity.
-+
-+@item c
-+Chopped rounding mode. Floating point numbers are rounded towards zero.
-+
-+@item d
-+Dynamic rounding mode. A field in the floating point control register
-+(@var{fpcr}, see Alpha architecture reference manual) controls the
-+rounding mode in effect. The C library initializes this register for
-+rounding towards plus infinity. Thus, unless your program modifies the
-+@var{fpcr}, @samp{d} corresponds to round towards plus infinity.
-+@end table
-+
-+@item -mtrap-precision=@var{trap-precision}
-+@opindex mtrap-precision
-+In the Alpha architecture, floating point traps are imprecise. This
-+means without software assistance it is impossible to recover from a
-+floating trap and program execution normally needs to be terminated.
-+GCC can generate code that can assist operating system trap handlers
-+in determining the exact location that caused a floating point trap.
-+Depending on the requirements of an application, different levels of
-+precisions can be selected:
-+
-+@table @samp
-+@item p
-+Program precision. This option is the default and means a trap handler
-+can only identify which program caused a floating point exception.
-+
-+@item f
-+Function precision. The trap handler can determine the function that
-+caused a floating point exception.
-+
-+@item i
-+Instruction precision. The trap handler can determine the exact
-+instruction that caused a floating point exception.
-+@end table
-+
-+Other Alpha compilers provide the equivalent options called
-+@option{-scope_safe} and @option{-resumption_safe}.
-+
-+@item -mieee-conformant
-+@opindex mieee-conformant
-+This option marks the generated code as IEEE conformant. You must not
-+use this option unless you also specify @option{-mtrap-precision=i} and either
-+@option{-mfp-trap-mode=su} or @option{-mfp-trap-mode=sui}. Its only effect
-+is to emit the line @samp{.eflag 48} in the function prologue of the
-+generated assembly file. Under DEC Unix, this has the effect that
-+IEEE-conformant math library routines will be linked in.
-+
-+@item -mbuild-constants
-+@opindex mbuild-constants
-+Normally GCC examines a 32- or 64-bit integer constant to
-+see if it can construct it from smaller constants in two or three
-+instructions. If it cannot, it will output the constant as a literal and
-+generate code to load it from the data segment at runtime.
-+
-+Use this option to require GCC to construct @emph{all} integer constants
-+using code, even if it takes more instructions (the maximum is six).
-+
-+You would typically use this option to build a shared library dynamic
-+loader. Itself a shared library, it must relocate itself in memory
-+before it can find the variables and constants in its own data segment.
-+
-+@item -malpha-as
-+@itemx -mgas
-+@opindex malpha-as
-+@opindex mgas
-+Select whether to generate code to be assembled by the vendor-supplied
-+assembler (@option{-malpha-as}) or by the GNU assembler @option{-mgas}.
-+
-+@item -mbwx
-+@itemx -mno-bwx
-+@itemx -mcix
-+@itemx -mno-cix
-+@itemx -mfix
-+@itemx -mno-fix
-+@itemx -mmax
-+@itemx -mno-max
-+@opindex mbwx
-+@opindex mno-bwx
-+@opindex mcix
-+@opindex mno-cix
-+@opindex mfix
-+@opindex mno-fix
-+@opindex mmax
-+@opindex mno-max
-+Indicate whether GCC should generate code to use the optional BWX,
-+CIX, FIX and MAX instruction sets. The default is to use the instruction
-+sets supported by the CPU type specified via @option{-mcpu=} option or that
-+of the CPU on which GCC was built if none was specified.
-+
-+@item -mfloat-vax
-+@itemx -mfloat-ieee
-+@opindex mfloat-vax
-+@opindex mfloat-ieee
-+Generate code that uses (does not use) VAX F and G floating point
-+arithmetic instead of IEEE single and double precision.
-+
-+@item -mexplicit-relocs
-+@itemx -mno-explicit-relocs
-+@opindex mexplicit-relocs
-+@opindex mno-explicit-relocs
-+Older Alpha assemblers provided no way to generate symbol relocations
-+except via assembler macros. Use of these macros does not allow
-+optimal instruction scheduling. GNU binutils as of version 2.12
-+supports a new syntax that allows the compiler to explicitly mark
-+which relocations should apply to which instructions. This option
-+is mostly useful for debugging, as GCC detects the capabilities of
-+the assembler when it is built and sets the default accordingly.
-+
-+@item -msmall-data
-+@itemx -mlarge-data
-+@opindex msmall-data
-+@opindex mlarge-data
-+When @option{-mexplicit-relocs} is in effect, static data is
-+accessed via @dfn{gp-relative} relocations. When @option{-msmall-data}
-+is used, objects 8 bytes long or smaller are placed in a @dfn{small data area}
-+(the @code{.sdata} and @code{.sbss} sections) and are accessed via
-+16-bit relocations off of the @code{$gp} register. This limits the
-+size of the small data area to 64KB, but allows the variables to be
-+directly accessed via a single instruction.
-+
-+The default is @option{-mlarge-data}. With this option the data area
-+is limited to just below 2GB@. Programs that require more than 2GB of
-+data must use @code{malloc} or @code{mmap} to allocate the data in the
-+heap instead of in the program's data segment.
-+
-+When generating code for shared libraries, @option{-fpic} implies
-+@option{-msmall-data} and @option{-fPIC} implies @option{-mlarge-data}.
-+
-+@item -msmall-text
-+@itemx -mlarge-text
-+@opindex msmall-text
-+@opindex mlarge-text
-+When @option{-msmall-text} is used, the compiler assumes that the
-+code of the entire program (or shared library) fits in 4MB, and is
-+thus reachable with a branch instruction. When @option{-msmall-data}
-+is used, the compiler can assume that all local symbols share the
-+same @code{$gp} value, and thus reduce the number of instructions
-+required for a function call from 4 to 1.
-+
-+The default is @option{-mlarge-text}.
-+
-+@item -mcpu=@var{cpu_type}
-+@opindex mcpu
-+Set the instruction set and instruction scheduling parameters for
-+machine type @var{cpu_type}. You can specify either the @samp{EV}
-+style name or the corresponding chip number. GCC supports scheduling
-+parameters for the EV4, EV5 and EV6 family of processors and will
-+choose the default values for the instruction set from the processor
-+you specify. If you do not specify a processor type, GCC will default
-+to the processor on which the compiler was built.
-+
-+Supported values for @var{cpu_type} are
-+
-+@table @samp
-+@item ev4
-+@itemx ev45
-+@itemx 21064
-+Schedules as an EV4 and has no instruction set extensions.
-+
-+@item ev5
-+@itemx 21164
-+Schedules as an EV5 and has no instruction set extensions.
-+
-+@item ev56
-+@itemx 21164a
-+Schedules as an EV5 and supports the BWX extension.
-+
-+@item pca56
-+@itemx 21164pc
-+@itemx 21164PC
-+Schedules as an EV5 and supports the BWX and MAX extensions.
-+
-+@item ev6
-+@itemx 21264
-+Schedules as an EV6 and supports the BWX, FIX, and MAX extensions.
-+
-+@item ev67
-+@itemx 21264a
-+Schedules as an EV6 and supports the BWX, CIX, FIX, and MAX extensions.
-+@end table
-+
-+Native Linux/GNU toolchains also support the value @samp{native},
-+which selects the best architecture option for the host processor.
-+@option{-mcpu=native} has no effect if GCC does not recognize
-+the processor.
-+
-+@item -mtune=@var{cpu_type}
-+@opindex mtune
-+Set only the instruction scheduling parameters for machine type
-+@var{cpu_type}. The instruction set is not changed.
-+
-+Native Linux/GNU toolchains also support the value @samp{native},
-+which selects the best architecture option for the host processor.
-+@option{-mtune=native} has no effect if GCC does not recognize
-+the processor.
-+
-+@item -mmemory-latency=@var{time}
-+@opindex mmemory-latency
-+Sets the latency the scheduler should assume for typical memory
-+references as seen by the application. This number is highly
-+dependent on the memory access patterns used by the application
-+and the size of the external cache on the machine.
-+
-+Valid options for @var{time} are
-+
-+@table @samp
-+@item @var{number}
-+A decimal number representing clock cycles.
-+
-+@item L1
-+@itemx L2
-+@itemx L3
-+@itemx main
-+The compiler contains estimates of the number of clock cycles for
-+``typical'' EV4 & EV5 hardware for the Level 1, 2 & 3 caches
-+(also called Dcache, Scache, and Bcache), as well as to main memory.
-+Note that L3 is only valid for EV5.
-+
-+@end table
-+@end table
-+
-+@node DEC Alpha/VMS Options
-+@subsection DEC Alpha/VMS Options
-+
-+These @samp{-m} options are defined for the DEC Alpha/VMS implementations:
-+
-+@table @gcctabopt
-+@item -mvms-return-codes
-+@opindex mvms-return-codes
-+Return VMS condition codes from main. The default is to return POSIX
-+style condition (e.g.@: error) codes.
-+@end table
-+
-+@node FR30 Options
-+@subsection FR30 Options
-+@cindex FR30 Options
-+
-+These options are defined specifically for the FR30 port.
-+
-+@table @gcctabopt
-+
-+@item -msmall-model
-+@opindex msmall-model
-+Use the small address space model. This can produce smaller code, but
-+it does assume that all symbolic values and addresses will fit into a
-+20-bit range.
-+
-+@item -mno-lsim
-+@opindex mno-lsim
-+Assume that run-time support has been provided and so there is no need
-+to include the simulator library (@file{libsim.a}) on the linker
-+command line.
-+
-+@end table
-+
-+@node FRV Options
-+@subsection FRV Options
-+@cindex FRV Options
-+
-+@table @gcctabopt
-+@item -mgpr-32
-+@opindex mgpr-32
-+
-+Only use the first 32 general purpose registers.
-+
-+@item -mgpr-64
-+@opindex mgpr-64
-+
-+Use all 64 general purpose registers.
-+
-+@item -mfpr-32
-+@opindex mfpr-32
-+
-+Use only the first 32 floating point registers.
-+
-+@item -mfpr-64
-+@opindex mfpr-64
-+
-+Use all 64 floating point registers
-+
-+@item -mhard-float
-+@opindex mhard-float
-+
-+Use hardware instructions for floating point operations.
-+
-+@item -msoft-float
-+@opindex msoft-float
-+
-+Use library routines for floating point operations.
-+
-+@item -malloc-cc
-+@opindex malloc-cc
-+
-+Dynamically allocate condition code registers.
-+
-+@item -mfixed-cc
-+@opindex mfixed-cc
-+
-+Do not try to dynamically allocate condition code registers, only
-+use @code{icc0} and @code{fcc0}.
-+
-+@item -mdword
-+@opindex mdword
-+
-+Change ABI to use double word insns.
-+
-+@item -mno-dword
-+@opindex mno-dword
-+
-+Do not use double word instructions.
-+
-+@item -mdouble
-+@opindex mdouble
-+
-+Use floating point double instructions.
-+
-+@item -mno-double
-+@opindex mno-double
-+
-+Do not use floating point double instructions.
-+
-+@item -mmedia
-+@opindex mmedia
-+
-+Use media instructions.
-+
-+@item -mno-media
-+@opindex mno-media
-+
-+Do not use media instructions.
-+
-+@item -mmuladd
-+@opindex mmuladd
-+
-+Use multiply and add/subtract instructions.
-+
-+@item -mno-muladd
-+@opindex mno-muladd
-+
-+Do not use multiply and add/subtract instructions.
-+
-+@item -mfdpic
-+@opindex mfdpic
-+
-+Select the FDPIC ABI, that uses function descriptors to represent
-+pointers to functions. Without any PIC/PIE-related options, it
-+implies @option{-fPIE}. With @option{-fpic} or @option{-fpie}, it
-+assumes GOT entries and small data are within a 12-bit range from the
-+GOT base address; with @option{-fPIC} or @option{-fPIE}, GOT offsets
-+are computed with 32 bits.
-+With a @samp{bfin-elf} target, this option implies @option{-msim}.
-+
-+@item -minline-plt
-+@opindex minline-plt
-+
-+Enable inlining of PLT entries in function calls to functions that are
-+not known to bind locally. It has no effect without @option{-mfdpic}.
-+It's enabled by default if optimizing for speed and compiling for
-+shared libraries (i.e., @option{-fPIC} or @option{-fpic}), or when an
-+optimization option such as @option{-O3} or above is present in the
-+command line.
-+
-+@item -mTLS
-+@opindex TLS
-+
-+Assume a large TLS segment when generating thread-local code.
-+
-+@item -mtls
-+@opindex tls
-+
-+Do not assume a large TLS segment when generating thread-local code.
-+
-+@item -mgprel-ro
-+@opindex mgprel-ro
-+
-+Enable the use of @code{GPREL} relocations in the FDPIC ABI for data
-+that is known to be in read-only sections. It's enabled by default,
-+except for @option{-fpic} or @option{-fpie}: even though it may help
-+make the global offset table smaller, it trades 1 instruction for 4.
-+With @option{-fPIC} or @option{-fPIE}, it trades 3 instructions for 4,
-+one of which may be shared by multiple symbols, and it avoids the need
-+for a GOT entry for the referenced symbol, so it's more likely to be a
-+win. If it is not, @option{-mno-gprel-ro} can be used to disable it.
-+
-+@item -multilib-library-pic
-+@opindex multilib-library-pic
-+
-+Link with the (library, not FD) pic libraries. It's implied by
-+@option{-mlibrary-pic}, as well as by @option{-fPIC} and
-+@option{-fpic} without @option{-mfdpic}. You should never have to use
-+it explicitly.
-+
-+@item -mlinked-fp
-+@opindex mlinked-fp
-+
-+Follow the EABI requirement of always creating a frame pointer whenever
-+a stack frame is allocated. This option is enabled by default and can
-+be disabled with @option{-mno-linked-fp}.
-+
-+@item -mlong-calls
-+@opindex mlong-calls
-+
-+Use indirect addressing to call functions outside the current
-+compilation unit. This allows the functions to be placed anywhere
-+within the 32-bit address space.
-+
-+@item -malign-labels
-+@opindex malign-labels
-+
-+Try to align labels to an 8-byte boundary by inserting nops into the
-+previous packet. This option only has an effect when VLIW packing
-+is enabled. It doesn't create new packets; it merely adds nops to
-+existing ones.
-+
-+@item -mlibrary-pic
-+@opindex mlibrary-pic
-+
-+Generate position-independent EABI code.
-+
-+@item -macc-4
-+@opindex macc-4
-+
-+Use only the first four media accumulator registers.
-+
-+@item -macc-8
-+@opindex macc-8
-+
-+Use all eight media accumulator registers.
-+
-+@item -mpack
-+@opindex mpack
-+
-+Pack VLIW instructions.
-+
-+@item -mno-pack
-+@opindex mno-pack
-+
-+Do not pack VLIW instructions.
-+
-+@item -mno-eflags
-+@opindex mno-eflags
-+
-+Do not mark ABI switches in e_flags.
-+
-+@item -mcond-move
-+@opindex mcond-move
-+
-+Enable the use of conditional-move instructions (default).
-+
-+This switch is mainly for debugging the compiler and will likely be removed
-+in a future version.
-+
-+@item -mno-cond-move
-+@opindex mno-cond-move
-+
-+Disable the use of conditional-move instructions.
-+
-+This switch is mainly for debugging the compiler and will likely be removed
-+in a future version.
-+
-+@item -mscc
-+@opindex mscc
-+
-+Enable the use of conditional set instructions (default).
-+
-+This switch is mainly for debugging the compiler and will likely be removed
-+in a future version.
-+
-+@item -mno-scc
-+@opindex mno-scc
-+
-+Disable the use of conditional set instructions.
-+
-+This switch is mainly for debugging the compiler and will likely be removed
-+in a future version.
-+
-+@item -mcond-exec
-+@opindex mcond-exec
-+
-+Enable the use of conditional execution (default).
-+
-+This switch is mainly for debugging the compiler and will likely be removed
-+in a future version.
-+
-+@item -mno-cond-exec
-+@opindex mno-cond-exec
-+
-+Disable the use of conditional execution.
-+
-+This switch is mainly for debugging the compiler and will likely be removed
-+in a future version.
-+
-+@item -mvliw-branch
-+@opindex mvliw-branch
-+
-+Run a pass to pack branches into VLIW instructions (default).
-+
-+This switch is mainly for debugging the compiler and will likely be removed
-+in a future version.
-+
-+@item -mno-vliw-branch
-+@opindex mno-vliw-branch
-+
-+Do not run a pass to pack branches into VLIW instructions.
-+
-+This switch is mainly for debugging the compiler and will likely be removed
-+in a future version.
-+
-+@item -mmulti-cond-exec
-+@opindex mmulti-cond-exec
-+
-+Enable optimization of @code{&&} and @code{||} in conditional execution
-+(default).
-+
-+This switch is mainly for debugging the compiler and will likely be removed
-+in a future version.
-+
-+@item -mno-multi-cond-exec
-+@opindex mno-multi-cond-exec
-+
-+Disable optimization of @code{&&} and @code{||} in conditional execution.
-+
-+This switch is mainly for debugging the compiler and will likely be removed
-+in a future version.
-+
-+@item -mnested-cond-exec
-+@opindex mnested-cond-exec
-+
-+Enable nested conditional execution optimizations (default).
-+
-+This switch is mainly for debugging the compiler and will likely be removed
-+in a future version.
-+
-+@item -mno-nested-cond-exec
-+@opindex mno-nested-cond-exec
-+
-+Disable nested conditional execution optimizations.
-+
-+This switch is mainly for debugging the compiler and will likely be removed
-+in a future version.
-+
-+@item -moptimize-membar
-+@opindex moptimize-membar
-+
-+This switch removes redundant @code{membar} instructions from the
-+compiler generated code. It is enabled by default.
-+
-+@item -mno-optimize-membar
-+@opindex mno-optimize-membar
-+
-+This switch disables the automatic removal of redundant @code{membar}
-+instructions from the generated code.
-+
-+@item -mtomcat-stats
-+@opindex mtomcat-stats
-+
-+Cause gas to print out tomcat statistics.
-+
-+@item -mcpu=@var{cpu}
-+@opindex mcpu
-+
-+Select the processor type for which to generate code. Possible values are
-+@samp{frv}, @samp{fr550}, @samp{tomcat}, @samp{fr500}, @samp{fr450},
-+@samp{fr405}, @samp{fr400}, @samp{fr300} and @samp{simple}.
-+
-+@end table
-+
-+@node GNU/Linux Options
-+@subsection GNU/Linux Options
-+
-+These @samp{-m} options are defined for GNU/Linux targets:
-+
-+@table @gcctabopt
-+@item -mglibc
-+@opindex mglibc
-+Use the GNU C library instead of uClibc. This is the default except
-+on @samp{*-*-linux-*uclibc*} targets.
-+
-+@item -muclibc
-+@opindex muclibc
-+Use uClibc instead of the GNU C library. This is the default on
-+@samp{*-*-linux-*uclibc*} targets.
-+@end table
-+
-+@node H8/300 Options
-+@subsection H8/300 Options
-+
-+These @samp{-m} options are defined for the H8/300 implementations:
-+
-+@table @gcctabopt
-+@item -mrelax
-+@opindex mrelax
-+Shorten some address references at link time, when possible; uses the
-+linker option @option{-relax}. @xref{H8/300,, @code{ld} and the H8/300,
-+ld, Using ld}, for a fuller description.
-+
-+@item -mh
-+@opindex mh
-+Generate code for the H8/300H@.
-+
-+@item -ms
-+@opindex ms
-+Generate code for the H8S@.
-+
-+@item -mn
-+@opindex mn
-+Generate code for the H8S and H8/300H in the normal mode. This switch
-+must be used either with @option{-mh} or @option{-ms}.
-+
-+@item -ms2600
-+@opindex ms2600
-+Generate code for the H8S/2600. This switch must be used with @option{-ms}.
-+
-+@item -mint32
-+@opindex mint32
-+Make @code{int} data 32 bits by default.
-+
-+@item -malign-300
-+@opindex malign-300
-+On the H8/300H and H8S, use the same alignment rules as for the H8/300.
-+The default for the H8/300H and H8S is to align longs and floats on 4
-+byte boundaries.
-+@option{-malign-300} causes them to be aligned on 2 byte boundaries.
-+This option has no effect on the H8/300.
-+@end table
-+
-+@node HPPA Options
-+@subsection HPPA Options
-+@cindex HPPA Options
-+
-+These @samp{-m} options are defined for the HPPA family of computers:
-+
-+@table @gcctabopt
-+@item -march=@var{architecture-type}
-+@opindex march
-+Generate code for the specified architecture. The choices for
-+@var{architecture-type} are @samp{1.0} for PA 1.0, @samp{1.1} for PA
-+1.1, and @samp{2.0} for PA 2.0 processors. Refer to
-+@file{/usr/lib/sched.models} on an HP-UX system to determine the proper
-+architecture option for your machine. Code compiled for lower numbered
-+architectures will run on higher numbered architectures, but not the
-+other way around.
-+
-+@item -mpa-risc-1-0
-+@itemx -mpa-risc-1-1
-+@itemx -mpa-risc-2-0
-+@opindex mpa-risc-1-0
-+@opindex mpa-risc-1-1
-+@opindex mpa-risc-2-0
-+Synonyms for @option{-march=1.0}, @option{-march=1.1}, and @option{-march=2.0} respectively.
-+
-+@item -mbig-switch
-+@opindex mbig-switch
-+Generate code suitable for big switch tables. Use this option only if
-+the assembler/linker complain about out of range branches within a switch
-+table.
-+
-+@item -mjump-in-delay
-+@opindex mjump-in-delay
-+Fill delay slots of function calls with unconditional jump instructions
-+by modifying the return pointer for the function call to be the target
-+of the conditional jump.
-+
-+@item -mdisable-fpregs
-+@opindex mdisable-fpregs
-+Prevent floating point registers from being used in any manner. This is
-+necessary for compiling kernels which perform lazy context switching of
-+floating point registers. If you use this option and attempt to perform
-+floating point operations, the compiler will abort.
-+
-+@item -mdisable-indexing
-+@opindex mdisable-indexing
-+Prevent the compiler from using indexing address modes. This avoids some
-+rather obscure problems when compiling MIG generated code under MACH@.
-+
-+@item -mno-space-regs
-+@opindex mno-space-regs
-+Generate code that assumes the target has no space registers. This allows
-+GCC to generate faster indirect calls and use unscaled index address modes.
-+
-+Such code is suitable for level 0 PA systems and kernels.
-+
-+@item -mfast-indirect-calls
-+@opindex mfast-indirect-calls
-+Generate code that assumes calls never cross space boundaries. This
-+allows GCC to emit code which performs faster indirect calls.
-+
-+This option will not work in the presence of shared libraries or nested
-+functions.
-+
-+@item -mfixed-range=@var{register-range}
-+@opindex mfixed-range
-+Generate code treating the given register range as fixed registers.
-+A fixed register is one that the register allocator can not use. This is
-+useful when compiling kernel code. A register range is specified as
-+two registers separated by a dash. Multiple register ranges can be
-+specified separated by a comma.
-+
-+@item -mlong-load-store
-+@opindex mlong-load-store
-+Generate 3-instruction load and store sequences as sometimes required by
-+the HP-UX 10 linker. This is equivalent to the @samp{+k} option to
-+the HP compilers.
-+
-+@item -mportable-runtime
-+@opindex mportable-runtime
-+Use the portable calling conventions proposed by HP for ELF systems.
-+
-+@item -mgas
-+@opindex mgas
-+Enable the use of assembler directives only GAS understands.
-+
-+@item -mschedule=@var{cpu-type}
-+@opindex mschedule
-+Schedule code according to the constraints for the machine type
-+@var{cpu-type}. The choices for @var{cpu-type} are @samp{700}
-+@samp{7100}, @samp{7100LC}, @samp{7200}, @samp{7300} and @samp{8000}. Refer
-+to @file{/usr/lib/sched.models} on an HP-UX system to determine the
-+proper scheduling option for your machine. The default scheduling is
-+@samp{8000}.
-+
-+@item -mlinker-opt
-+@opindex mlinker-opt
-+Enable the optimization pass in the HP-UX linker. Note this makes symbolic
-+debugging impossible. It also triggers a bug in the HP-UX 8 and HP-UX 9
-+linkers in which they give bogus error messages when linking some programs.
-+
-+@item -msoft-float
-+@opindex msoft-float
-+Generate output containing library calls for floating point.
-+@strong{Warning:} the requisite libraries are not available for all HPPA
-+targets. Normally the facilities of the machine's usual C compiler are
-+used, but this cannot be done directly in cross-compilation. You must make
-+your own arrangements to provide suitable library functions for
-+cross-compilation.
-+
-+@option{-msoft-float} changes the calling convention in the output file;
-+therefore, it is only useful if you compile @emph{all} of a program with
-+this option. In particular, you need to compile @file{libgcc.a}, the
-+library that comes with GCC, with @option{-msoft-float} in order for
-+this to work.
-+
-+@item -msio
-+@opindex msio
-+Generate the predefine, @code{_SIO}, for server IO@. The default is
-+@option{-mwsio}. This generates the predefines, @code{__hp9000s700},
-+@code{__hp9000s700__} and @code{_WSIO}, for workstation IO@. These
-+options are available under HP-UX and HI-UX@.
-+
-+@item -mgnu-ld
-+@opindex gnu-ld
-+Use GNU ld specific options. This passes @option{-shared} to ld when
-+building a shared library. It is the default when GCC is configured,
-+explicitly or implicitly, with the GNU linker. This option does not
-+have any affect on which ld is called, it only changes what parameters
-+are passed to that ld. The ld that is called is determined by the
-+@option{--with-ld} configure option, GCC's program search path, and
-+finally by the user's @env{PATH}. The linker used by GCC can be printed
-+using @samp{which `gcc -print-prog-name=ld`}. This option is only available
-+on the 64 bit HP-UX GCC, i.e.@: configured with @samp{hppa*64*-*-hpux*}.
-+
-+@item -mhp-ld
-+@opindex hp-ld
-+Use HP ld specific options. This passes @option{-b} to ld when building
-+a shared library and passes @option{+Accept TypeMismatch} to ld on all
-+links. It is the default when GCC is configured, explicitly or
-+implicitly, with the HP linker. This option does not have any affect on
-+which ld is called, it only changes what parameters are passed to that
-+ld. The ld that is called is determined by the @option{--with-ld}
-+configure option, GCC's program search path, and finally by the user's
-+@env{PATH}. The linker used by GCC can be printed using @samp{which
-+`gcc -print-prog-name=ld`}. This option is only available on the 64 bit
-+HP-UX GCC, i.e.@: configured with @samp{hppa*64*-*-hpux*}.
-+
-+@item -mlong-calls
-+@opindex mno-long-calls
-+Generate code that uses long call sequences. This ensures that a call
-+is always able to reach linker generated stubs. The default is to generate
-+long calls only when the distance from the call site to the beginning
-+of the function or translation unit, as the case may be, exceeds a
-+predefined limit set by the branch type being used. The limits for
-+normal calls are 7,600,000 and 240,000 bytes, respectively for the
-+PA 2.0 and PA 1.X architectures. Sibcalls are always limited at
-+240,000 bytes.
-+
-+Distances are measured from the beginning of functions when using the
-+@option{-ffunction-sections} option, or when using the @option{-mgas}
-+and @option{-mno-portable-runtime} options together under HP-UX with
-+the SOM linker.
-+
-+It is normally not desirable to use this option as it will degrade
-+performance. However, it may be useful in large applications,
-+particularly when partial linking is used to build the application.
-+
-+The types of long calls used depends on the capabilities of the
-+assembler and linker, and the type of code being generated. The
-+impact on systems that support long absolute calls, and long pic
-+symbol-difference or pc-relative calls should be relatively small.
-+However, an indirect call is used on 32-bit ELF systems in pic code
-+and it is quite long.
-+
-+@item -munix=@var{unix-std}
-+@opindex march
-+Generate compiler predefines and select a startfile for the specified
-+UNIX standard. The choices for @var{unix-std} are @samp{93}, @samp{95}
-+and @samp{98}. @samp{93} is supported on all HP-UX versions. @samp{95}
-+is available on HP-UX 10.10 and later. @samp{98} is available on HP-UX
-+11.11 and later. The default values are @samp{93} for HP-UX 10.00,
-+@samp{95} for HP-UX 10.10 though to 11.00, and @samp{98} for HP-UX 11.11
-+and later.
-+
-+@option{-munix=93} provides the same predefines as GCC 3.3 and 3.4.
-+@option{-munix=95} provides additional predefines for @code{XOPEN_UNIX}
-+and @code{_XOPEN_SOURCE_EXTENDED}, and the startfile @file{unix95.o}.
-+@option{-munix=98} provides additional predefines for @code{_XOPEN_UNIX},
-+@code{_XOPEN_SOURCE_EXTENDED}, @code{_INCLUDE__STDC_A1_SOURCE} and
-+@code{_INCLUDE_XOPEN_SOURCE_500}, and the startfile @file{unix98.o}.
-+
-+It is @emph{important} to note that this option changes the interfaces
-+for various library routines. It also affects the operational behavior
-+of the C library. Thus, @emph{extreme} care is needed in using this
-+option.
-+
-+Library code that is intended to operate with more than one UNIX
-+standard must test, set and restore the variable @var{__xpg4_extended_mask}
-+as appropriate. Most GNU software doesn't provide this capability.
-+
-+@item -nolibdld
-+@opindex nolibdld
-+Suppress the generation of link options to search libdld.sl when the
-+@option{-static} option is specified on HP-UX 10 and later.
-+
-+@item -static
-+@opindex static
-+The HP-UX implementation of setlocale in libc has a dependency on
-+libdld.sl. There isn't an archive version of libdld.sl. Thus,
-+when the @option{-static} option is specified, special link options
-+are needed to resolve this dependency.
-+
-+On HP-UX 10 and later, the GCC driver adds the necessary options to
-+link with libdld.sl when the @option{-static} option is specified.
-+This causes the resulting binary to be dynamic. On the 64-bit port,
-+the linkers generate dynamic binaries by default in any case. The
-+@option{-nolibdld} option can be used to prevent the GCC driver from
-+adding these link options.
-+
-+@item -threads
-+@opindex threads
-+Add support for multithreading with the @dfn{dce thread} library
-+under HP-UX@. This option sets flags for both the preprocessor and
-+linker.
-+@end table
-+
-+@node i386 and x86-64 Options
-+@subsection Intel 386 and AMD x86-64 Options
-+@cindex i386 Options
-+@cindex x86-64 Options
-+@cindex Intel 386 Options
-+@cindex AMD x86-64 Options
-+
-+These @samp{-m} options are defined for the i386 and x86-64 family of
-+computers:
-+
-+@table @gcctabopt
-+@item -mtune=@var{cpu-type}
-+@opindex mtune
-+Tune to @var{cpu-type} everything applicable about the generated code, except
-+for the ABI and the set of available instructions. The choices for
-+@var{cpu-type} are:
-+@table @emph
-+@item generic
-+Produce code optimized for the most common IA32/AMD64/EM64T processors.
-+If you know the CPU on which your code will run, then you should use
-+the corresponding @option{-mtune} option instead of
-+@option{-mtune=generic}. But, if you do not know exactly what CPU users
-+of your application will have, then you should use this option.
-+
-+As new processors are deployed in the marketplace, the behavior of this
-+option will change. Therefore, if you upgrade to a newer version of
-+GCC, the code generated option will change to reflect the processors
-+that were most common when that version of GCC was released.
-+
-+There is no @option{-march=generic} option because @option{-march}
-+indicates the instruction set the compiler can use, and there is no
-+generic instruction set applicable to all processors. In contrast,
-+@option{-mtune} indicates the processor (or, in this case, collection of
-+processors) for which the code is optimized.
-+@item native
-+This selects the CPU to tune for at compilation time by determining
-+the processor type of the compiling machine. Using @option{-mtune=native}
-+will produce code optimized for the local machine under the constraints
-+of the selected instruction set. Using @option{-march=native} will
-+enable all instruction subsets supported by the local machine (hence
-+the result might not run on different machines).
-+@item i386
-+Original Intel's i386 CPU@.
-+@item i486
-+Intel's i486 CPU@. (No scheduling is implemented for this chip.)
-+@item i586, pentium
-+Intel Pentium CPU with no MMX support.
-+@item pentium-mmx
-+Intel PentiumMMX CPU based on Pentium core with MMX instruction set support.
-+@item pentiumpro
-+Intel PentiumPro CPU@.
-+@item i686
-+Same as @code{generic}, but when used as @code{march} option, PentiumPro
-+instruction set will be used, so the code will run on all i686 family chips.
-+@item pentium2
-+Intel Pentium2 CPU based on PentiumPro core with MMX instruction set support.
-+@item pentium3, pentium3m
-+Intel Pentium3 CPU based on PentiumPro core with MMX and SSE instruction set
-+support.
-+@item pentium-m
-+Low power version of Intel Pentium3 CPU with MMX, SSE and SSE2 instruction set
-+support. Used by Centrino notebooks.
-+@item pentium4, pentium4m
-+Intel Pentium4 CPU with MMX, SSE and SSE2 instruction set support.
-+@item prescott
-+Improved version of Intel Pentium4 CPU with MMX, SSE, SSE2 and SSE3 instruction
-+set support.
-+@item nocona
-+Improved version of Intel Pentium4 CPU with 64-bit extensions, MMX, SSE,
-+SSE2 and SSE3 instruction set support.
-+@item core2
-+Intel Core2 CPU with 64-bit extensions, MMX, SSE, SSE2, SSE3 and SSSE3
-+instruction set support.
-+@item k6
-+AMD K6 CPU with MMX instruction set support.
-+@item k6-2, k6-3
-+Improved versions of AMD K6 CPU with MMX and 3dNOW!@: instruction set support.
-+@item athlon, athlon-tbird
-+AMD Athlon CPU with MMX, 3dNOW!, enhanced 3dNOW!@: and SSE prefetch instructions
-+support.
-+@item athlon-4, athlon-xp, athlon-mp
-+Improved AMD Athlon CPU with MMX, 3dNOW!, enhanced 3dNOW!@: and full SSE
-+instruction set support.
-+@item k8, opteron, athlon64, athlon-fx
-+AMD K8 core based CPUs with x86-64 instruction set support. (This supersets
-+MMX, SSE, SSE2, 3dNOW!, enhanced 3dNOW!@: and 64-bit instruction set extensions.)
-+@item k8-sse3, opteron-sse3, athlon64-sse3
-+Improved versions of k8, opteron and athlon64 with SSE3 instruction set support.
-+@item amdfam10, barcelona
-+AMD Family 10h core based CPUs with x86-64 instruction set support. (This
-+supersets MMX, SSE, SSE2, SSE3, SSE4A, 3dNOW!, enhanced 3dNOW!, ABM and 64-bit
-+instruction set extensions.)
-+@item winchip-c6
-+IDT Winchip C6 CPU, dealt in same way as i486 with additional MMX instruction
-+set support.
-+@item winchip2
-+IDT Winchip2 CPU, dealt in same way as i486 with additional MMX and 3dNOW!@:
-+instruction set support.
-+@item c3
-+Via C3 CPU with MMX and 3dNOW!@: instruction set support. (No scheduling is
-+implemented for this chip.)
-+@item c3-2
-+Via C3-2 CPU with MMX and SSE instruction set support. (No scheduling is
-+implemented for this chip.)
-+@item geode
-+Embedded AMD CPU with MMX and 3dNOW! instruction set support.
-+@end table
-+
-+While picking a specific @var{cpu-type} will schedule things appropriately
-+for that particular chip, the compiler will not generate any code that
-+does not run on the i386 without the @option{-march=@var{cpu-type}} option
-+being used.
-+
-+@item -march=@var{cpu-type}
-+@opindex march
-+Generate instructions for the machine type @var{cpu-type}. The choices
-+for @var{cpu-type} are the same as for @option{-mtune}. Moreover,
-+specifying @option{-march=@var{cpu-type}} implies @option{-mtune=@var{cpu-type}}.
-+
-+@item -mcpu=@var{cpu-type}
-+@opindex mcpu
-+A deprecated synonym for @option{-mtune}.
-+
-+@item -mfpmath=@var{unit}
-+@opindex march
-+Generate floating point arithmetics for selected unit @var{unit}. The choices
-+for @var{unit} are:
-+
-+@table @samp
-+@item 387
-+Use the standard 387 floating point coprocessor present majority of chips and
-+emulated otherwise. Code compiled with this option will run almost everywhere.
-+The temporary results are computed in 80bit precision instead of precision
-+specified by the type resulting in slightly different results compared to most
-+of other chips. See @option{-ffloat-store} for more detailed description.
-+
-+This is the default choice for i386 compiler.
-+
-+@item sse
-+Use scalar floating point instructions present in the SSE instruction set.
-+This instruction set is supported by Pentium3 and newer chips, in the AMD line
-+by Athlon-4, Athlon-xp and Athlon-mp chips. The earlier version of SSE
-+instruction set supports only single precision arithmetics, thus the double and
-+extended precision arithmetics is still done using 387. Later version, present
-+only in Pentium4 and the future AMD x86-64 chips supports double precision
-+arithmetics too.
-+
-+For the i386 compiler, you need to use @option{-march=@var{cpu-type}}, @option{-msse}
-+or @option{-msse2} switches to enable SSE extensions and make this option
-+effective. For the x86-64 compiler, these extensions are enabled by default.
-+
-+The resulting code should be considerably faster in the majority of cases and avoid
-+the numerical instability problems of 387 code, but may break some existing
-+code that expects temporaries to be 80bit.
-+
-+This is the default choice for the x86-64 compiler.
-+
-+@item sse,387
-+@itemx sse+387
-+@itemx both
-+Attempt to utilize both instruction sets at once. This effectively double the
-+amount of available registers and on chips with separate execution units for
-+387 and SSE the execution resources too. Use this option with care, as it is
-+still experimental, because the GCC register allocator does not model separate
-+functional units well resulting in instable performance.
-+@end table
-+
-+@item -masm=@var{dialect}
-+@opindex masm=@var{dialect}
-+Output asm instructions using selected @var{dialect}. Supported
-+choices are @samp{intel} or @samp{att} (the default one). Darwin does
-+not support @samp{intel}.
-+
-+@item -mieee-fp
-+@itemx -mno-ieee-fp
-+@opindex mieee-fp
-+@opindex mno-ieee-fp
-+Control whether or not the compiler uses IEEE floating point
-+comparisons. These handle correctly the case where the result of a
-+comparison is unordered.
-+
-+@item -msoft-float
-+@opindex msoft-float
-+Generate output containing library calls for floating point.
-+@strong{Warning:} the requisite libraries are not part of GCC@.
-+Normally the facilities of the machine's usual C compiler are used, but
-+this can't be done directly in cross-compilation. You must make your
-+own arrangements to provide suitable library functions for
-+cross-compilation.
-+
-+On machines where a function returns floating point results in the 80387
-+register stack, some floating point opcodes may be emitted even if
-+@option{-msoft-float} is used.
-+
-+@item -mno-fp-ret-in-387
-+@opindex mno-fp-ret-in-387
-+Do not use the FPU registers for return values of functions.
-+
-+The usual calling convention has functions return values of types
-+@code{float} and @code{double} in an FPU register, even if there
-+is no FPU@. The idea is that the operating system should emulate
-+an FPU@.
-+
-+The option @option{-mno-fp-ret-in-387} causes such values to be returned
-+in ordinary CPU registers instead.
-+
-+@item -mno-fancy-math-387
-+@opindex mno-fancy-math-387
-+Some 387 emulators do not support the @code{sin}, @code{cos} and
-+@code{sqrt} instructions for the 387. Specify this option to avoid
-+generating those instructions. This option is the default on FreeBSD,
-+OpenBSD and NetBSD@. This option is overridden when @option{-march}
-+indicates that the target cpu will always have an FPU and so the
-+instruction will not need emulation. As of revision 2.6.1, these
-+instructions are not generated unless you also use the
-+@option{-funsafe-math-optimizations} switch.
-+
-+@item -malign-double
-+@itemx -mno-align-double
-+@opindex malign-double
-+@opindex mno-align-double
-+Control whether GCC aligns @code{double}, @code{long double}, and
-+@code{long long} variables on a two word boundary or a one word
-+boundary. Aligning @code{double} variables on a two word boundary will
-+produce code that runs somewhat faster on a @samp{Pentium} at the
-+expense of more memory.
-+
-+On x86-64, @option{-malign-double} is enabled by default.
-+
-+@strong{Warning:} if you use the @option{-malign-double} switch,
-+structures containing the above types will be aligned differently than
-+the published application binary interface specifications for the 386
-+and will not be binary compatible with structures in code compiled
-+without that switch.
-+
-+@item -m96bit-long-double
-+@itemx -m128bit-long-double
-+@opindex m96bit-long-double
-+@opindex m128bit-long-double
-+These switches control the size of @code{long double} type. The i386
-+application binary interface specifies the size to be 96 bits,
-+so @option{-m96bit-long-double} is the default in 32 bit mode.
-+
-+Modern architectures (Pentium and newer) would prefer @code{long double}
-+to be aligned to an 8 or 16 byte boundary. In arrays or structures
-+conforming to the ABI, this would not be possible. So specifying a
-+@option{-m128bit-long-double} will align @code{long double}
-+to a 16 byte boundary by padding the @code{long double} with an additional
-+32 bit zero.
-+
-+In the x86-64 compiler, @option{-m128bit-long-double} is the default choice as
-+its ABI specifies that @code{long double} is to be aligned on 16 byte boundary.
-+
-+Notice that neither of these options enable any extra precision over the x87
-+standard of 80 bits for a @code{long double}.
-+
-+@strong{Warning:} if you override the default value for your target ABI, the
-+structures and arrays containing @code{long double} variables will change
-+their size as well as function calling convention for function taking
-+@code{long double} will be modified. Hence they will not be binary
-+compatible with arrays or structures in code compiled without that switch.
-+
-+@item -mlarge-data-threshold=@var{number}
-+@opindex mlarge-data-threshold=@var{number}
-+When @option{-mcmodel=medium} is specified, the data greater than
-+@var{threshold} are placed in large data section. This value must be the
-+same across all object linked into the binary and defaults to 65535.
-+
-+@item -mrtd
-+@opindex mrtd
-+Use a different function-calling convention, in which functions that
-+take a fixed number of arguments return with the @code{ret} @var{num}
-+instruction, which pops their arguments while returning. This saves one
-+instruction in the caller since there is no need to pop the arguments
-+there.
-+
-+You can specify that an individual function is called with this calling
-+sequence with the function attribute @samp{stdcall}. You can also
-+override the @option{-mrtd} option by using the function attribute
-+@samp{cdecl}. @xref{Function Attributes}.
-+
-+@strong{Warning:} this calling convention is incompatible with the one
-+normally used on Unix, so you cannot use it if you need to call
-+libraries compiled with the Unix compiler.
-+
-+Also, you must provide function prototypes for all functions that
-+take variable numbers of arguments (including @code{printf});
-+otherwise incorrect code will be generated for calls to those
-+functions.
-+
-+In addition, seriously incorrect code will result if you call a
-+function with too many arguments. (Normally, extra arguments are
-+harmlessly ignored.)
-+
-+@item -mregparm=@var{num}
-+@opindex mregparm
-+Control how many registers are used to pass integer arguments. By
-+default, no registers are used to pass arguments, and at most 3
-+registers can be used. You can control this behavior for a specific
-+function by using the function attribute @samp{regparm}.
-+@xref{Function Attributes}.
-+
-+@strong{Warning:} if you use this switch, and
-+@var{num} is nonzero, then you must build all modules with the same
-+value, including any libraries. This includes the system libraries and
-+startup modules.
-+
-+@item -msseregparm
-+@opindex msseregparm
-+Use SSE register passing conventions for float and double arguments
-+and return values. You can control this behavior for a specific
-+function by using the function attribute @samp{sseregparm}.
-+@xref{Function Attributes}.
-+
-+@strong{Warning:} if you use this switch then you must build all
-+modules with the same value, including any libraries. This includes
-+the system libraries and startup modules.
-+
-+@item -mpc32
-+@itemx -mpc64
-+@itemx -mpc80
-+@opindex mpc32
-+@opindex mpc64
-+@opindex mpc80
-+
-+Set 80387 floating-point precision to 32, 64 or 80 bits. When @option{-mpc32}
-+is specified, the significands of results of floating-point operations are
-+rounded to 24 bits (single precision); @option{-mpc64} rounds the
-+significands of results of floating-point operations to 53 bits (double
-+precision) and @option{-mpc80} rounds the significands of results of
-+floating-point operations to 64 bits (extended double precision), which is
-+the default. When this option is used, floating-point operations in higher
-+precisions are not available to the programmer without setting the FPU
-+control word explicitly.
-+
-+Setting the rounding of floating-point operations to less than the default
-+80 bits can speed some programs by 2% or more. Note that some mathematical
-+libraries assume that extended precision (80 bit) floating-point operations
-+are enabled by default; routines in such libraries could suffer significant
-+loss of accuracy, typically through so-called "catastrophic cancellation",
-+when this option is used to set the precision to less than extended precision.
-+
-+@item -mstackrealign
-+@opindex mstackrealign
-+Realign the stack at entry. On the Intel x86, the @option{-mstackrealign}
-+option will generate an alternate prologue and epilogue that realigns the
-+runtime stack if necessary. This supports mixing legacy codes that keep
-+a 4-byte aligned stack with modern codes that keep a 16-byte stack for
-+SSE compatibility. See also the attribute @code{force_align_arg_pointer},
-+applicable to individual functions.
-+
-+@item -mpreferred-stack-boundary=@var{num}
-+@opindex mpreferred-stack-boundary
-+Attempt to keep the stack boundary aligned to a 2 raised to @var{num}
-+byte boundary. If @option{-mpreferred-stack-boundary} is not specified,
-+the default is 4 (16 bytes or 128 bits).
-+
-+@item -mincoming-stack-boundary=@var{num}
-+@opindex mincoming-stack-boundary
-+Assume the incoming stack is aligned to a 2 raised to @var{num} byte
-+boundary. If @option{-mincoming-stack-boundary} is not specified,
-+the one specified by @option{-mpreferred-stack-boundary} will be used.
-+
-+On Pentium and PentiumPro, @code{double} and @code{long double} values
-+should be aligned to an 8 byte boundary (see @option{-malign-double}) or
-+suffer significant run time performance penalties. On Pentium III, the
-+Streaming SIMD Extension (SSE) data type @code{__m128} may not work
-+properly if it is not 16 byte aligned.
-+
-+To ensure proper alignment of this values on the stack, the stack boundary
-+must be as aligned as that required by any value stored on the stack.
-+Further, every function must be generated such that it keeps the stack
-+aligned. Thus calling a function compiled with a higher preferred
-+stack boundary from a function compiled with a lower preferred stack
-+boundary will most likely misalign the stack. It is recommended that
-+libraries that use callbacks always use the default setting.
-+
-+This extra alignment does consume extra stack space, and generally
-+increases code size. Code that is sensitive to stack space usage, such
-+as embedded systems and operating system kernels, may want to reduce the
-+preferred alignment to @option{-mpreferred-stack-boundary=2}.
-+
-+@item -mmmx
-+@itemx -mno-mmx
-+@itemx -msse
-+@itemx -mno-sse
-+@itemx -msse2
-+@itemx -mno-sse2
-+@itemx -msse3
-+@itemx -mno-sse3
-+@itemx -mssse3
-+@itemx -mno-ssse3
-+@itemx -msse4.1
-+@itemx -mno-sse4.1
-+@itemx -msse4.2
-+@itemx -mno-sse4.2
-+@itemx -msse4
-+@itemx -mno-sse4
-+@itemx -mavx
-+@itemx -mno-avx
-+@itemx -maes
-+@itemx -mno-aes
-+@itemx -mpclmul
-+@itemx -mno-pclmul
-+@itemx -msse4a
-+@itemx -mno-sse4a
-+@itemx -msse5
-+@itemx -mno-sse5
-+@itemx -m3dnow
-+@itemx -mno-3dnow
-+@itemx -mpopcnt
-+@itemx -mno-popcnt
-+@itemx -mabm
-+@itemx -mno-abm
-+@opindex mmmx
-+@opindex mno-mmx
-+@opindex msse
-+@opindex mno-sse
-+@opindex m3dnow
-+@opindex mno-3dnow
-+These switches enable or disable the use of instructions in the MMX,
-+SSE, SSE2, SSE3, SSSE3, SSE4.1, AVX, AES, PCLMUL, SSE4A, SSE5, ABM or
-+3DNow!@: extended instruction sets.
-+These extensions are also available as built-in functions: see
-+@ref{X86 Built-in Functions}, for details of the functions enabled and
-+disabled by these switches.
-+
-+To have SSE/SSE2 instructions generated automatically from floating-point
-+code (as opposed to 387 instructions), see @option{-mfpmath=sse}.
-+
-+GCC depresses SSEx instructions when @option{-mavx} is used. Instead, it
-+generates new AVX instructions or AVX equivalence for all SSEx instructions
-+when needed.
-+
-+These options will enable GCC to use these extended instructions in
-+generated code, even without @option{-mfpmath=sse}. Applications which
-+perform runtime CPU detection must compile separate files for each
-+supported architecture, using the appropriate flags. In particular,
-+the file containing the CPU detection code should be compiled without
-+these options.
-+
-+@item -mcld
-+@opindex mcld
-+This option instructs GCC to emit a @code{cld} instruction in the prologue
-+of functions that use string instructions. String instructions depend on
-+the DF flag to select between autoincrement or autodecrement mode. While the
-+ABI specifies the DF flag to be cleared on function entry, some operating
-+systems violate this specification by not clearing the DF flag in their
-+exception dispatchers. The exception handler can be invoked with the DF flag
-+set which leads to wrong direction mode, when string instructions are used.
-+This option can be enabled by default on 32-bit x86 targets by configuring
-+GCC with the @option{--enable-cld} configure option. Generation of @code{cld}
-+instructions can be suppressed with the @option{-mno-cld} compiler option
-+in this case.
-+
-+@item -mcx16
-+@opindex mcx16
-+This option will enable GCC to use CMPXCHG16B instruction in generated code.
-+CMPXCHG16B allows for atomic operations on 128-bit double quadword (or oword)
-+data types. This is useful for high resolution counters that could be updated
-+by multiple processors (or cores). This instruction is generated as part of
-+atomic built-in functions: see @ref{Atomic Builtins} for details.
-+
-+@item -msahf
-+@opindex msahf
-+This option will enable GCC to use SAHF instruction in generated 64-bit code.
-+Early Intel CPUs with Intel 64 lacked LAHF and SAHF instructions supported
-+by AMD64 until introduction of Pentium 4 G1 step in December 2005. LAHF and
-+SAHF are load and store instructions, respectively, for certain status flags.
-+In 64-bit mode, SAHF instruction is used to optimize @code{fmod}, @code{drem}
-+or @code{remainder} built-in functions: see @ref{Other Builtins} for details.
-+
-+@item -mrecip
-+@opindex mrecip
-+This option will enable GCC to use RCPSS and RSQRTSS instructions (and their
-+vectorized variants RCPPS and RSQRTPS) with an additional Newton-Raphson step
-+to increase precision instead of DIVSS and SQRTSS (and their vectorized
-+variants) for single precision floating point arguments. These instructions
-+are generated only when @option{-funsafe-math-optimizations} is enabled
-+together with @option{-finite-math-only} and @option{-fno-trapping-math}.
-+Note that while the throughput of the sequence is higher than the throughput
-+of the non-reciprocal instruction, the precision of the sequence can be
-+decreased by up to 2 ulp (i.e. the inverse of 1.0 equals 0.99999994).
-+
-+@item -mveclibabi=@var{type}
-+@opindex mveclibabi
-+Specifies the ABI type to use for vectorizing intrinsics using an
-+external library. Supported types are @code{svml} for the Intel short
-+vector math library and @code{acml} for the AMD math core library style
-+of interfacing. GCC will currently emit calls to @code{vmldExp2},
-+@code{vmldLn2}, @code{vmldLog102}, @code{vmldLog102}, @code{vmldPow2},
-+@code{vmldTanh2}, @code{vmldTan2}, @code{vmldAtan2}, @code{vmldAtanh2},
-+@code{vmldCbrt2}, @code{vmldSinh2}, @code{vmldSin2}, @code{vmldAsinh2},
-+@code{vmldAsin2}, @code{vmldCosh2}, @code{vmldCos2}, @code{vmldAcosh2},
-+@code{vmldAcos2}, @code{vmlsExp4}, @code{vmlsLn4}, @code{vmlsLog104},
-+@code{vmlsLog104}, @code{vmlsPow4}, @code{vmlsTanh4}, @code{vmlsTan4},
-+@code{vmlsAtan4}, @code{vmlsAtanh4}, @code{vmlsCbrt4}, @code{vmlsSinh4},
-+@code{vmlsSin4}, @code{vmlsAsinh4}, @code{vmlsAsin4}, @code{vmlsCosh4},
-+@code{vmlsCos4}, @code{vmlsAcosh4} and @code{vmlsAcos4} for corresponding
-+function type when @option{-mveclibabi=svml} is used and @code{__vrd2_sin},
-+@code{__vrd2_cos}, @code{__vrd2_exp}, @code{__vrd2_log}, @code{__vrd2_log2},
-+@code{__vrd2_log10}, @code{__vrs4_sinf}, @code{__vrs4_cosf},
-+@code{__vrs4_expf}, @code{__vrs4_logf}, @code{__vrs4_log2f},
-+@code{__vrs4_log10f} and @code{__vrs4_powf} for corresponding function type
-+when @option{-mveclibabi=acml} is used. Both @option{-ftree-vectorize} and
-+@option{-funsafe-math-optimizations} have to be enabled. A SVML or ACML ABI
-+compatible library will have to be specified at link time.
-+
-+@item -mpush-args
-+@itemx -mno-push-args
-+@opindex mpush-args
-+@opindex mno-push-args
-+Use PUSH operations to store outgoing parameters. This method is shorter
-+and usually equally fast as method using SUB/MOV operations and is enabled
-+by default. In some cases disabling it may improve performance because of
-+improved scheduling and reduced dependencies.
-+
-+@item -maccumulate-outgoing-args
-+@opindex maccumulate-outgoing-args
-+If enabled, the maximum amount of space required for outgoing arguments will be
-+computed in the function prologue. This is faster on most modern CPUs
-+because of reduced dependencies, improved scheduling and reduced stack usage
-+when preferred stack boundary is not equal to 2. The drawback is a notable
-+increase in code size. This switch implies @option{-mno-push-args}.
-+
-+@item -mthreads
-+@opindex mthreads
-+Support thread-safe exception handling on @samp{Mingw32}. Code that relies
-+on thread-safe exception handling must compile and link all code with the
-+@option{-mthreads} option. When compiling, @option{-mthreads} defines
-+@option{-D_MT}; when linking, it links in a special thread helper library
-+@option{-lmingwthrd} which cleans up per thread exception handling data.
-+
-+@item -mno-align-stringops
-+@opindex mno-align-stringops
-+Do not align destination of inlined string operations. This switch reduces
-+code size and improves performance in case the destination is already aligned,
-+but GCC doesn't know about it.
-+
-+@item -minline-all-stringops
-+@opindex minline-all-stringops
-+By default GCC inlines string operations only when destination is known to be
-+aligned at least to 4 byte boundary. This enables more inlining, increase code
-+size, but may improve performance of code that depends on fast memcpy, strlen
-+and memset for short lengths.
-+
-+@item -minline-stringops-dynamically
-+@opindex minline-stringops-dynamically
-+For string operation of unknown size, inline runtime checks so for small
-+blocks inline code is used, while for large blocks library call is used.
-+
-+@item -mstringop-strategy=@var{alg}
-+@opindex mstringop-strategy=@var{alg}
-+Overwrite internal decision heuristic about particular algorithm to inline
-+string operation with. The allowed values are @code{rep_byte},
-+@code{rep_4byte}, @code{rep_8byte} for expanding using i386 @code{rep} prefix
-+of specified size, @code{byte_loop}, @code{loop}, @code{unrolled_loop} for
-+expanding inline loop, @code{libcall} for always expanding library call.
-+
-+@item -momit-leaf-frame-pointer
-+@opindex momit-leaf-frame-pointer
-+Don't keep the frame pointer in a register for leaf functions. This
-+avoids the instructions to save, set up and restore frame pointers and
-+makes an extra register available in leaf functions. The option
-+@option{-fomit-frame-pointer} removes the frame pointer for all functions
-+which might make debugging harder.
-+
-+@item -mtls-direct-seg-refs
-+@itemx -mno-tls-direct-seg-refs
-+@opindex mtls-direct-seg-refs
-+Controls whether TLS variables may be accessed with offsets from the
-+TLS segment register (@code{%gs} for 32-bit, @code{%fs} for 64-bit),
-+or whether the thread base pointer must be added. Whether or not this
-+is legal depends on the operating system, and whether it maps the
-+segment to cover the entire TLS area.
-+
-+For systems that use GNU libc, the default is on.
-+
-+@item -mfused-madd
-+@itemx -mno-fused-madd
-+@opindex mfused-madd
-+Enable automatic generation of fused floating point multiply-add instructions
-+if the ISA supports such instructions. The -mfused-madd option is on by
-+default. The fused multiply-add instructions have a different
-+rounding behavior compared to executing a multiply followed by an add.
-+
-+@item -msse2avx
-+@itemx -mno-sse2avx
-+@opindex msse2avx
-+Specify that the assembler should encode SSE instructions with VEX
-+prefix. The option @option{-mavx} turns this on by default.
-+@end table
-+
-+These @samp{-m} switches are supported in addition to the above
-+on AMD x86-64 processors in 64-bit environments.
-+
-+@table @gcctabopt
-+@item -m32
-+@itemx -m64
-+@opindex m32
-+@opindex m64
-+Generate code for a 32-bit or 64-bit environment.
-+The 32-bit environment sets int, long and pointer to 32 bits and
-+generates code that runs on any i386 system.
-+The 64-bit environment sets int to 32 bits and long and pointer
-+to 64 bits and generates code for AMD's x86-64 architecture. For
-+darwin only the -m64 option turns off the @option{-fno-pic} and
-+@option{-mdynamic-no-pic} options.
-+
-+@item -mno-red-zone
-+@opindex no-red-zone
-+Do not use a so called red zone for x86-64 code. The red zone is mandated
-+by the x86-64 ABI, it is a 128-byte area beyond the location of the
-+stack pointer that will not be modified by signal or interrupt handlers
-+and therefore can be used for temporary data without adjusting the stack
-+pointer. The flag @option{-mno-red-zone} disables this red zone.
-+
-+@item -mcmodel=small
-+@opindex mcmodel=small
-+Generate code for the small code model: the program and its symbols must
-+be linked in the lower 2 GB of the address space. Pointers are 64 bits.
-+Programs can be statically or dynamically linked. This is the default
-+code model.
-+
-+@item -mcmodel=kernel
-+@opindex mcmodel=kernel
-+Generate code for the kernel code model. The kernel runs in the
-+negative 2 GB of the address space.
-+This model has to be used for Linux kernel code.
-+
-+@item -mcmodel=medium
-+@opindex mcmodel=medium
-+Generate code for the medium model: The program is linked in the lower 2
-+GB of the address space. Small symbols are also placed there. Symbols
-+with sizes larger than @option{-mlarge-data-threshold} are put into
-+large data or bss sections and can be located above 2GB. Programs can
-+be statically or dynamically linked.
-+
-+@item -mcmodel=large
-+@opindex mcmodel=large
-+Generate code for the large model: This model makes no assumptions
-+about addresses and sizes of sections.
-+@end table
-+
-+@node i386 and x86-64 Windows Options
-+@subsection i386 and x86-64 Windows Options
-+@cindex i386 and x86-64 Windows Options
-+
-+These additional options are available for Windows targets:
-+
-+@table @gcctabopt
-+@item -mconsole
-+@opindex mconsole
-+This option is available for Cygwin and MinGW targets. It
-+specifies that a console application is to be generated, by
-+instructing the linker to set the PE header subsystem type
-+required for console applications.
-+This is the default behaviour for Cygwin and MinGW targets.
-+
-+@item -mcygwin
-+@opindex mcygwin
-+This option is available for Cygwin targets. It specifies that
-+the Cygwin internal interface is to be used for predefined
-+preprocessor macros, C runtime libraries and related linker
-+paths and options. For Cygwin targets this is the default behaviour.
-+This option is deprecated and will be removed in a future release.
-+
-+@item -mno-cygwin
-+@opindex mno-cygwin
-+This option is available for Cygwin targets. It specifies that
-+the MinGW internal interface is to be used instead of Cygwin's, by
-+setting MinGW-related predefined macros and linker paths and default
-+library options.
-+This option is deprecated and will be removed in a future release.
-+
-+@item -mdll
-+@opindex mdll
-+This option is available for Cygwin and MinGW targets. It
-+specifies that a DLL - a dynamic link library - is to be
-+generated, enabling the selection of the required runtime
-+startup object and entry point.
-+
-+@item -mnop-fun-dllimport
-+@opindex mnop-fun-dllimport
-+This option is available for Cygwin and MinGW targets. It
-+specifies that the dllimport attribute should be ignored.
-+
-+@item -mthread
-+@opindex mthread
-+This option is available for MinGW targets. It specifies
-+that MinGW-specific thread support is to be used.
-+
-+@item -mwin32
-+@opindex mwin32
-+This option is available for Cygwin and MinGW targets. It
-+specifies that the typical Windows pre-defined macros are to
-+be set in the pre-processor, but does not influence the choice
-+of runtime library/startup code.
-+
-+@item -mwindows
-+@opindex mwindows
-+This option is available for Cygwin and MinGW targets. It
-+specifies that a GUI application is to be generated by
-+instructing the linker to set the PE header subsystem type
-+appropriately.
-+@end table
-+
-+See also under @ref{i386 and x86-64 Options} for standard options.
-+
-+@node IA-64 Options
-+@subsection IA-64 Options
-+@cindex IA-64 Options
-+
-+These are the @samp{-m} options defined for the Intel IA-64 architecture.
-+
-+@table @gcctabopt
-+@item -mbig-endian
-+@opindex mbig-endian
-+Generate code for a big endian target. This is the default for HP-UX@.
-+
-+@item -mlittle-endian
-+@opindex mlittle-endian
-+Generate code for a little endian target. This is the default for AIX5
-+and GNU/Linux.
-+
-+@item -mgnu-as
-+@itemx -mno-gnu-as
-+@opindex mgnu-as
-+@opindex mno-gnu-as
-+Generate (or don't) code for the GNU assembler. This is the default.
-+@c Also, this is the default if the configure option @option{--with-gnu-as}
-+@c is used.
-+
-+@item -mgnu-ld
-+@itemx -mno-gnu-ld
-+@opindex mgnu-ld
-+@opindex mno-gnu-ld
-+Generate (or don't) code for the GNU linker. This is the default.
-+@c Also, this is the default if the configure option @option{--with-gnu-ld}
-+@c is used.
-+
-+@item -mno-pic
-+@opindex mno-pic
-+Generate code that does not use a global pointer register. The result
-+is not position independent code, and violates the IA-64 ABI@.
-+
-+@item -mvolatile-asm-stop
-+@itemx -mno-volatile-asm-stop
-+@opindex mvolatile-asm-stop
-+@opindex mno-volatile-asm-stop
-+Generate (or don't) a stop bit immediately before and after volatile asm
-+statements.
-+
-+@item -mregister-names
-+@itemx -mno-register-names
-+@opindex mregister-names
-+@opindex mno-register-names
-+Generate (or don't) @samp{in}, @samp{loc}, and @samp{out} register names for
-+the stacked registers. This may make assembler output more readable.
-+
-+@item -mno-sdata
-+@itemx -msdata
-+@opindex mno-sdata
-+@opindex msdata
-+Disable (or enable) optimizations that use the small data section. This may
-+be useful for working around optimizer bugs.
-+
-+@item -mconstant-gp
-+@opindex mconstant-gp
-+Generate code that uses a single constant global pointer value. This is
-+useful when compiling kernel code.
-+
-+@item -mauto-pic
-+@opindex mauto-pic
-+Generate code that is self-relocatable. This implies @option{-mconstant-gp}.
-+This is useful when compiling firmware code.
-+
-+@item -minline-float-divide-min-latency
-+@opindex minline-float-divide-min-latency
-+Generate code for inline divides of floating point values
-+using the minimum latency algorithm.
-+
-+@item -minline-float-divide-max-throughput
-+@opindex minline-float-divide-max-throughput
-+Generate code for inline divides of floating point values
-+using the maximum throughput algorithm.
-+
-+@item -minline-int-divide-min-latency
-+@opindex minline-int-divide-min-latency
-+Generate code for inline divides of integer values
-+using the minimum latency algorithm.
-+
-+@item -minline-int-divide-max-throughput
-+@opindex minline-int-divide-max-throughput
-+Generate code for inline divides of integer values
-+using the maximum throughput algorithm.
-+
-+@item -minline-sqrt-min-latency
-+@opindex minline-sqrt-min-latency
-+Generate code for inline square roots
-+using the minimum latency algorithm.
-+
-+@item -minline-sqrt-max-throughput
-+@opindex minline-sqrt-max-throughput
-+Generate code for inline square roots
-+using the maximum throughput algorithm.
-+
-+@item -mno-dwarf2-asm
-+@itemx -mdwarf2-asm
-+@opindex mno-dwarf2-asm
-+@opindex mdwarf2-asm
-+Don't (or do) generate assembler code for the DWARF2 line number debugging
-+info. This may be useful when not using the GNU assembler.
-+
-+@item -mearly-stop-bits
-+@itemx -mno-early-stop-bits
-+@opindex mearly-stop-bits
-+@opindex mno-early-stop-bits
-+Allow stop bits to be placed earlier than immediately preceding the
-+instruction that triggered the stop bit. This can improve instruction
-+scheduling, but does not always do so.
-+
-+@item -mfixed-range=@var{register-range}
-+@opindex mfixed-range
-+Generate code treating the given register range as fixed registers.
-+A fixed register is one that the register allocator can not use. This is
-+useful when compiling kernel code. A register range is specified as
-+two registers separated by a dash. Multiple register ranges can be
-+specified separated by a comma.
-+
-+@item -mtls-size=@var{tls-size}
-+@opindex mtls-size
-+Specify bit size of immediate TLS offsets. Valid values are 14, 22, and
-+64.
-+
-+@item -mtune=@var{cpu-type}
-+@opindex mtune
-+Tune the instruction scheduling for a particular CPU, Valid values are
-+itanium, itanium1, merced, itanium2, and mckinley.
-+
-+@item -mt
-+@itemx -pthread
-+@opindex mt
-+@opindex pthread
-+Add support for multithreading using the POSIX threads library. This
-+option sets flags for both the preprocessor and linker. It does
-+not affect the thread safety of object code produced by the compiler or
-+that of libraries supplied with it. These are HP-UX specific flags.
-+
-+@item -milp32
-+@itemx -mlp64
-+@opindex milp32
-+@opindex mlp64
-+Generate code for a 32-bit or 64-bit environment.
-+The 32-bit environment sets int, long and pointer to 32 bits.
-+The 64-bit environment sets int to 32 bits and long and pointer
-+to 64 bits. These are HP-UX specific flags.
-+
-+@item -mno-sched-br-data-spec
-+@itemx -msched-br-data-spec
-+@opindex mno-sched-br-data-spec
-+@opindex msched-br-data-spec
-+(Dis/En)able data speculative scheduling before reload.
-+This will result in generation of the ld.a instructions and
-+the corresponding check instructions (ld.c / chk.a).
-+The default is 'disable'.
-+
-+@item -msched-ar-data-spec
-+@itemx -mno-sched-ar-data-spec
-+@opindex msched-ar-data-spec
-+@opindex mno-sched-ar-data-spec
-+(En/Dis)able data speculative scheduling after reload.
-+This will result in generation of the ld.a instructions and
-+the corresponding check instructions (ld.c / chk.a).
-+The default is 'enable'.
-+
-+@item -mno-sched-control-spec
-+@itemx -msched-control-spec
-+@opindex mno-sched-control-spec
-+@opindex msched-control-spec
-+(Dis/En)able control speculative scheduling. This feature is
-+available only during region scheduling (i.e.@: before reload).
-+This will result in generation of the ld.s instructions and
-+the corresponding check instructions chk.s .
-+The default is 'disable'.
-+
-+@item -msched-br-in-data-spec
-+@itemx -mno-sched-br-in-data-spec
-+@opindex msched-br-in-data-spec
-+@opindex mno-sched-br-in-data-spec
-+(En/Dis)able speculative scheduling of the instructions that
-+are dependent on the data speculative loads before reload.
-+This is effective only with @option{-msched-br-data-spec} enabled.
-+The default is 'enable'.
-+
-+@item -msched-ar-in-data-spec
-+@itemx -mno-sched-ar-in-data-spec
-+@opindex msched-ar-in-data-spec
-+@opindex mno-sched-ar-in-data-spec
-+(En/Dis)able speculative scheduling of the instructions that
-+are dependent on the data speculative loads after reload.
-+This is effective only with @option{-msched-ar-data-spec} enabled.
-+The default is 'enable'.
-+
-+@item -msched-in-control-spec
-+@itemx -mno-sched-in-control-spec
-+@opindex msched-in-control-spec
-+@opindex mno-sched-in-control-spec
-+(En/Dis)able speculative scheduling of the instructions that
-+are dependent on the control speculative loads.
-+This is effective only with @option{-msched-control-spec} enabled.
-+The default is 'enable'.
-+
-+@item -msched-ldc
-+@itemx -mno-sched-ldc
-+@opindex msched-ldc
-+@opindex mno-sched-ldc
-+(En/Dis)able use of simple data speculation checks ld.c .
-+If disabled, only chk.a instructions will be emitted to check
-+data speculative loads.
-+The default is 'enable'.
-+
-+@item -mno-sched-control-ldc
-+@itemx -msched-control-ldc
-+@opindex mno-sched-control-ldc
-+@opindex msched-control-ldc
-+(Dis/En)able use of ld.c instructions to check control speculative loads.
-+If enabled, in case of control speculative load with no speculatively
-+scheduled dependent instructions this load will be emitted as ld.sa and
-+ld.c will be used to check it.
-+The default is 'disable'.
-+
-+@item -mno-sched-spec-verbose
-+@itemx -msched-spec-verbose
-+@opindex mno-sched-spec-verbose
-+@opindex msched-spec-verbose
-+(Dis/En)able printing of the information about speculative motions.
-+
-+@item -mno-sched-prefer-non-data-spec-insns
-+@itemx -msched-prefer-non-data-spec-insns
-+@opindex mno-sched-prefer-non-data-spec-insns
-+@opindex msched-prefer-non-data-spec-insns
-+If enabled, data speculative instructions will be chosen for schedule
-+only if there are no other choices at the moment. This will make
-+the use of the data speculation much more conservative.
-+The default is 'disable'.
-+
-+@item -mno-sched-prefer-non-control-spec-insns
-+@itemx -msched-prefer-non-control-spec-insns
-+@opindex mno-sched-prefer-non-control-spec-insns
-+@opindex msched-prefer-non-control-spec-insns
-+If enabled, control speculative instructions will be chosen for schedule
-+only if there are no other choices at the moment. This will make
-+the use of the control speculation much more conservative.
-+The default is 'disable'.
-+
-+@item -mno-sched-count-spec-in-critical-path
-+@itemx -msched-count-spec-in-critical-path
-+@opindex mno-sched-count-spec-in-critical-path
-+@opindex msched-count-spec-in-critical-path
-+If enabled, speculative dependencies will be considered during
-+computation of the instructions priorities. This will make the use of the
-+speculation a bit more conservative.
-+The default is 'disable'.
-+
-+@end table
-+
-+@node M32C Options
-+@subsection M32C Options
-+@cindex M32C options
-+
-+@table @gcctabopt
-+@item -mcpu=@var{name}
-+@opindex mcpu=
-+Select the CPU for which code is generated. @var{name} may be one of
-+@samp{r8c} for the R8C/Tiny series, @samp{m16c} for the M16C (up to
-+/60) series, @samp{m32cm} for the M16C/80 series, or @samp{m32c} for
-+the M32C/80 series.
-+
-+@item -msim
-+@opindex msim
-+Specifies that the program will be run on the simulator. This causes
-+an alternate runtime library to be linked in which supports, for
-+example, file I/O@. You must not use this option when generating
-+programs that will run on real hardware; you must provide your own
-+runtime library for whatever I/O functions are needed.
-+
-+@item -memregs=@var{number}
-+@opindex memregs=
-+Specifies the number of memory-based pseudo-registers GCC will use
-+during code generation. These pseudo-registers will be used like real
-+registers, so there is a tradeoff between GCC's ability to fit the
-+code into available registers, and the performance penalty of using
-+memory instead of registers. Note that all modules in a program must
-+be compiled with the same value for this option. Because of that, you
-+must not use this option with the default runtime libraries gcc
-+builds.
-+
-+@end table
-+
-+@node M32R/D Options
-+@subsection M32R/D Options
-+@cindex M32R/D options
-+
-+These @option{-m} options are defined for Renesas M32R/D architectures:
-+
-+@table @gcctabopt
-+@item -m32r2
-+@opindex m32r2
-+Generate code for the M32R/2@.
-+
-+@item -m32rx
-+@opindex m32rx
-+Generate code for the M32R/X@.
-+
-+@item -m32r
-+@opindex m32r
-+Generate code for the M32R@. This is the default.
-+
-+@item -mmodel=small
-+@opindex mmodel=small
-+Assume all objects live in the lower 16MB of memory (so that their addresses
-+can be loaded with the @code{ld24} instruction), and assume all subroutines
-+are reachable with the @code{bl} instruction.
-+This is the default.
-+
-+The addressability of a particular object can be set with the
-+@code{model} attribute.
-+
-+@item -mmodel=medium
-+@opindex mmodel=medium
-+Assume objects may be anywhere in the 32-bit address space (the compiler
-+will generate @code{seth/add3} instructions to load their addresses), and
-+assume all subroutines are reachable with the @code{bl} instruction.
-+
-+@item -mmodel=large
-+@opindex mmodel=large
-+Assume objects may be anywhere in the 32-bit address space (the compiler
-+will generate @code{seth/add3} instructions to load their addresses), and
-+assume subroutines may not be reachable with the @code{bl} instruction
-+(the compiler will generate the much slower @code{seth/add3/jl}
-+instruction sequence).
-+
-+@item -msdata=none
-+@opindex msdata=none
-+Disable use of the small data area. Variables will be put into
-+one of @samp{.data}, @samp{bss}, or @samp{.rodata} (unless the
-+@code{section} attribute has been specified).
-+This is the default.
-+
-+The small data area consists of sections @samp{.sdata} and @samp{.sbss}.
-+Objects may be explicitly put in the small data area with the
-+@code{section} attribute using one of these sections.
-+
-+@item -msdata=sdata
-+@opindex msdata=sdata
-+Put small global and static data in the small data area, but do not
-+generate special code to reference them.
-+
-+@item -msdata=use
-+@opindex msdata=use
-+Put small global and static data in the small data area, and generate
-+special instructions to reference them.
-+
-+@item -G @var{num}
-+@opindex G
-+@cindex smaller data references
-+Put global and static objects less than or equal to @var{num} bytes
-+into the small data or bss sections instead of the normal data or bss
-+sections. The default value of @var{num} is 8.
-+The @option{-msdata} option must be set to one of @samp{sdata} or @samp{use}
-+for this option to have any effect.
-+
-+All modules should be compiled with the same @option{-G @var{num}} value.
-+Compiling with different values of @var{num} may or may not work; if it
-+doesn't the linker will give an error message---incorrect code will not be
-+generated.
-+
-+@item -mdebug
-+@opindex mdebug
-+Makes the M32R specific code in the compiler display some statistics
-+that might help in debugging programs.
-+
-+@item -malign-loops
-+@opindex malign-loops
-+Align all loops to a 32-byte boundary.
-+
-+@item -mno-align-loops
-+@opindex mno-align-loops
-+Do not enforce a 32-byte alignment for loops. This is the default.
-+
-+@item -missue-rate=@var{number}
-+@opindex missue-rate=@var{number}
-+Issue @var{number} instructions per cycle. @var{number} can only be 1
-+or 2.
-+
-+@item -mbranch-cost=@var{number}
-+@opindex mbranch-cost=@var{number}
-+@var{number} can only be 1 or 2. If it is 1 then branches will be
-+preferred over conditional code, if it is 2, then the opposite will
-+apply.
-+
-+@item -mflush-trap=@var{number}
-+@opindex mflush-trap=@var{number}
-+Specifies the trap number to use to flush the cache. The default is
-+12. Valid numbers are between 0 and 15 inclusive.
-+
-+@item -mno-flush-trap
-+@opindex mno-flush-trap
-+Specifies that the cache cannot be flushed by using a trap.
-+
-+@item -mflush-func=@var{name}
-+@opindex mflush-func=@var{name}
-+Specifies the name of the operating system function to call to flush
-+the cache. The default is @emph{_flush_cache}, but a function call
-+will only be used if a trap is not available.
-+
-+@item -mno-flush-func
-+@opindex mno-flush-func
-+Indicates that there is no OS function for flushing the cache.
-+
-+@end table
-+
-+@node M680x0 Options
-+@subsection M680x0 Options
-+@cindex M680x0 options
-+
-+These are the @samp{-m} options defined for M680x0 and ColdFire processors.
-+The default settings depend on which architecture was selected when
-+the compiler was configured; the defaults for the most common choices
-+are given below.
-+
-+@table @gcctabopt
-+@item -march=@var{arch}
-+@opindex march
-+Generate code for a specific M680x0 or ColdFire instruction set
-+architecture. Permissible values of @var{arch} for M680x0
-+architectures are: @samp{68000}, @samp{68010}, @samp{68020},
-+@samp{68030}, @samp{68040}, @samp{68060} and @samp{cpu32}. ColdFire
-+architectures are selected according to Freescale's ISA classification
-+and the permissible values are: @samp{isaa}, @samp{isaaplus},
-+@samp{isab} and @samp{isac}.
-+
-+gcc defines a macro @samp{__mcf@var{arch}__} whenever it is generating
-+code for a ColdFire target. The @var{arch} in this macro is one of the
-+@option{-march} arguments given above.
-+
-+When used together, @option{-march} and @option{-mtune} select code
-+that runs on a family of similar processors but that is optimized
-+for a particular microarchitecture.
-+
-+@item -mcpu=@var{cpu}
-+@opindex mcpu
-+Generate code for a specific M680x0 or ColdFire processor.
-+The M680x0 @var{cpu}s are: @samp{68000}, @samp{68010}, @samp{68020},
-+@samp{68030}, @samp{68040}, @samp{68060}, @samp{68302}, @samp{68332}
-+and @samp{cpu32}. The ColdFire @var{cpu}s are given by the table
-+below, which also classifies the CPUs into families:
-+
-+@multitable @columnfractions 0.20 0.80
-+@item @strong{Family} @tab @strong{@samp{-mcpu} arguments}
-+@item @samp{51qe} @tab @samp{51qe}
-+@item @samp{5206} @tab @samp{5202} @samp{5204} @samp{5206}
-+@item @samp{5206e} @tab @samp{5206e}
-+@item @samp{5208} @tab @samp{5207} @samp{5208}
-+@item @samp{5211a} @tab @samp{5210a} @samp{5211a}
-+@item @samp{5213} @tab @samp{5211} @samp{5212} @samp{5213}
-+@item @samp{5216} @tab @samp{5214} @samp{5216}
-+@item @samp{52235} @tab @samp{52230} @samp{52231} @samp{52232} @samp{52233} @samp{52234} @samp{52235}
-+@item @samp{5225} @tab @samp{5224} @samp{5225}
-+@item @samp{5235} @tab @samp{5232} @samp{5233} @samp{5234} @samp{5235} @samp{523x}
-+@item @samp{5249} @tab @samp{5249}
-+@item @samp{5250} @tab @samp{5250}
-+@item @samp{5271} @tab @samp{5270} @samp{5271}
-+@item @samp{5272} @tab @samp{5272}
-+@item @samp{5275} @tab @samp{5274} @samp{5275}
-+@item @samp{5282} @tab @samp{5280} @samp{5281} @samp{5282} @samp{528x}
-+@item @samp{5307} @tab @samp{5307}
-+@item @samp{5329} @tab @samp{5327} @samp{5328} @samp{5329} @samp{532x}
-+@item @samp{5373} @tab @samp{5372} @samp{5373} @samp{537x}
-+@item @samp{5407} @tab @samp{5407}
-+@item @samp{5475} @tab @samp{5470} @samp{5471} @samp{5472} @samp{5473} @samp{5474} @samp{5475} @samp{547x} @samp{5480} @samp{5481} @samp{5482} @samp{5483} @samp{5484} @samp{5485}
-+@end multitable
-+
-+@option{-mcpu=@var{cpu}} overrides @option{-march=@var{arch}} if
-+@var{arch} is compatible with @var{cpu}. Other combinations of
-+@option{-mcpu} and @option{-march} are rejected.
-+
-+gcc defines the macro @samp{__mcf_cpu_@var{cpu}} when ColdFire target
-+@var{cpu} is selected. It also defines @samp{__mcf_family_@var{family}},
-+where the value of @var{family} is given by the table above.
-+
-+@item -mtune=@var{tune}
-+@opindex mtune
-+Tune the code for a particular microarchitecture, within the
-+constraints set by @option{-march} and @option{-mcpu}.
-+The M680x0 microarchitectures are: @samp{68000}, @samp{68010},
-+@samp{68020}, @samp{68030}, @samp{68040}, @samp{68060}
-+and @samp{cpu32}. The ColdFire microarchitectures
-+are: @samp{cfv1}, @samp{cfv2}, @samp{cfv3}, @samp{cfv4} and @samp{cfv4e}.
-+
-+You can also use @option{-mtune=68020-40} for code that needs
-+to run relatively well on 68020, 68030 and 68040 targets.
-+@option{-mtune=68020-60} is similar but includes 68060 targets
-+as well. These two options select the same tuning decisions as
-+@option{-m68020-40} and @option{-m68020-60} respectively.
-+
-+gcc defines the macros @samp{__mc@var{arch}} and @samp{__mc@var{arch}__}
-+when tuning for 680x0 architecture @var{arch}. It also defines
-+@samp{mc@var{arch}} unless either @option{-ansi} or a non-GNU @option{-std}
-+option is used. If gcc is tuning for a range of architectures,
-+as selected by @option{-mtune=68020-40} or @option{-mtune=68020-60},
-+it defines the macros for every architecture in the range.
-+
-+gcc also defines the macro @samp{__m@var{uarch}__} when tuning for
-+ColdFire microarchitecture @var{uarch}, where @var{uarch} is one
-+of the arguments given above.
-+
-+@item -m68000
-+@itemx -mc68000
-+@opindex m68000
-+@opindex mc68000
-+Generate output for a 68000. This is the default
-+when the compiler is configured for 68000-based systems.
-+It is equivalent to @option{-march=68000}.
-+
-+Use this option for microcontrollers with a 68000 or EC000 core,
-+including the 68008, 68302, 68306, 68307, 68322, 68328 and 68356.
-+
-+@item -m68010
-+@opindex m68010
-+Generate output for a 68010. This is the default
-+when the compiler is configured for 68010-based systems.
-+It is equivalent to @option{-march=68010}.
-+
-+@item -m68020
-+@itemx -mc68020
-+@opindex m68020
-+@opindex mc68020
-+Generate output for a 68020. This is the default
-+when the compiler is configured for 68020-based systems.
-+It is equivalent to @option{-march=68020}.
-+
-+@item -m68030
-+@opindex m68030
-+Generate output for a 68030. This is the default when the compiler is
-+configured for 68030-based systems. It is equivalent to
-+@option{-march=68030}.
-+
-+@item -m68040
-+@opindex m68040
-+Generate output for a 68040. This is the default when the compiler is
-+configured for 68040-based systems. It is equivalent to
-+@option{-march=68040}.
-+
-+This option inhibits the use of 68881/68882 instructions that have to be
-+emulated by software on the 68040. Use this option if your 68040 does not
-+have code to emulate those instructions.
-+
-+@item -m68060
-+@opindex m68060
-+Generate output for a 68060. This is the default when the compiler is
-+configured for 68060-based systems. It is equivalent to
-+@option{-march=68060}.
-+
-+This option inhibits the use of 68020 and 68881/68882 instructions that
-+have to be emulated by software on the 68060. Use this option if your 68060
-+does not have code to emulate those instructions.
-+
-+@item -mcpu32
-+@opindex mcpu32
-+Generate output for a CPU32. This is the default
-+when the compiler is configured for CPU32-based systems.
-+It is equivalent to @option{-march=cpu32}.
-+
-+Use this option for microcontrollers with a
-+CPU32 or CPU32+ core, including the 68330, 68331, 68332, 68333, 68334,
-+68336, 68340, 68341, 68349 and 68360.
-+
-+@item -m5200
-+@opindex m5200
-+Generate output for a 520X ColdFire CPU@. This is the default
-+when the compiler is configured for 520X-based systems.
-+It is equivalent to @option{-mcpu=5206}, and is now deprecated
-+in favor of that option.
-+
-+Use this option for microcontroller with a 5200 core, including
-+the MCF5202, MCF5203, MCF5204 and MCF5206.
-+
-+@item -m5206e
-+@opindex m5206e
-+Generate output for a 5206e ColdFire CPU@. The option is now
-+deprecated in favor of the equivalent @option{-mcpu=5206e}.
-+
-+@item -m528x
-+@opindex m528x
-+Generate output for a member of the ColdFire 528X family.
-+The option is now deprecated in favor of the equivalent
-+@option{-mcpu=528x}.
-+
-+@item -m5307
-+@opindex m5307
-+Generate output for a ColdFire 5307 CPU@. The option is now deprecated
-+in favor of the equivalent @option{-mcpu=5307}.
-+
-+@item -m5407
-+@opindex m5407
-+Generate output for a ColdFire 5407 CPU@. The option is now deprecated
-+in favor of the equivalent @option{-mcpu=5407}.
-+
-+@item -mcfv4e
-+@opindex mcfv4e
-+Generate output for a ColdFire V4e family CPU (e.g.@: 547x/548x).
-+This includes use of hardware floating point instructions.
-+The option is equivalent to @option{-mcpu=547x}, and is now
-+deprecated in favor of that option.
-+
-+@item -m68020-40
-+@opindex m68020-40
-+Generate output for a 68040, without using any of the new instructions.
-+This results in code which can run relatively efficiently on either a
-+68020/68881 or a 68030 or a 68040. The generated code does use the
-+68881 instructions that are emulated on the 68040.
-+
-+The option is equivalent to @option{-march=68020} @option{-mtune=68020-40}.
-+
-+@item -m68020-60
-+@opindex m68020-60
-+Generate output for a 68060, without using any of the new instructions.
-+This results in code which can run relatively efficiently on either a
-+68020/68881 or a 68030 or a 68040. The generated code does use the
-+68881 instructions that are emulated on the 68060.
-+
-+The option is equivalent to @option{-march=68020} @option{-mtune=68020-60}.
-+
-+@item -mhard-float
-+@itemx -m68881
-+@opindex mhard-float
-+@opindex m68881
-+Generate floating-point instructions. This is the default for 68020
-+and above, and for ColdFire devices that have an FPU@. It defines the
-+macro @samp{__HAVE_68881__} on M680x0 targets and @samp{__mcffpu__}
-+on ColdFire targets.
-+
-+@item -msoft-float
-+@opindex msoft-float
-+Do not generate floating-point instructions; use library calls instead.
-+This is the default for 68000, 68010, and 68832 targets. It is also
-+the default for ColdFire devices that have no FPU.
-+
-+@item -mdiv
-+@itemx -mno-div
-+@opindex mdiv
-+@opindex mno-div
-+Generate (do not generate) ColdFire hardware divide and remainder
-+instructions. If @option{-march} is used without @option{-mcpu},
-+the default is ``on'' for ColdFire architectures and ``off'' for M680x0
-+architectures. Otherwise, the default is taken from the target CPU
-+(either the default CPU, or the one specified by @option{-mcpu}). For
-+example, the default is ``off'' for @option{-mcpu=5206} and ``on'' for
-+@option{-mcpu=5206e}.
-+
-+gcc defines the macro @samp{__mcfhwdiv__} when this option is enabled.
-+
-+@item -mshort
-+@opindex mshort
-+Consider type @code{int} to be 16 bits wide, like @code{short int}.
-+Additionally, parameters passed on the stack are also aligned to a
-+16-bit boundary even on targets whose API mandates promotion to 32-bit.
-+
-+@item -mno-short
-+@opindex mno-short
-+Do not consider type @code{int} to be 16 bits wide. This is the default.
-+
-+@item -mnobitfield
-+@itemx -mno-bitfield
-+@opindex mnobitfield
-+@opindex mno-bitfield
-+Do not use the bit-field instructions. The @option{-m68000}, @option{-mcpu32}
-+and @option{-m5200} options imply @w{@option{-mnobitfield}}.
-+
-+@item -mbitfield
-+@opindex mbitfield
-+Do use the bit-field instructions. The @option{-m68020} option implies
-+@option{-mbitfield}. This is the default if you use a configuration
-+designed for a 68020.
-+
-+@item -mrtd
-+@opindex mrtd
-+Use a different function-calling convention, in which functions
-+that take a fixed number of arguments return with the @code{rtd}
-+instruction, which pops their arguments while returning. This
-+saves one instruction in the caller since there is no need to pop
-+the arguments there.
-+
-+This calling convention is incompatible with the one normally
-+used on Unix, so you cannot use it if you need to call libraries
-+compiled with the Unix compiler.
-+
-+Also, you must provide function prototypes for all functions that
-+take variable numbers of arguments (including @code{printf});
-+otherwise incorrect code will be generated for calls to those
-+functions.
-+
-+In addition, seriously incorrect code will result if you call a
-+function with too many arguments. (Normally, extra arguments are
-+harmlessly ignored.)
-+
-+The @code{rtd} instruction is supported by the 68010, 68020, 68030,
-+68040, 68060 and CPU32 processors, but not by the 68000 or 5200.
-+
-+@item -mno-rtd
-+@opindex mno-rtd
-+Do not use the calling conventions selected by @option{-mrtd}.
-+This is the default.
-+
-+@item -malign-int
-+@itemx -mno-align-int
-+@opindex malign-int
-+@opindex mno-align-int
-+Control whether GCC aligns @code{int}, @code{long}, @code{long long},
-+@code{float}, @code{double}, and @code{long double} variables on a 32-bit
-+boundary (@option{-malign-int}) or a 16-bit boundary (@option{-mno-align-int}).
-+Aligning variables on 32-bit boundaries produces code that runs somewhat
-+faster on processors with 32-bit busses at the expense of more memory.
-+
-+@strong{Warning:} if you use the @option{-malign-int} switch, GCC will
-+align structures containing the above types differently than
-+most published application binary interface specifications for the m68k.
-+
-+@item -mpcrel
-+@opindex mpcrel
-+Use the pc-relative addressing mode of the 68000 directly, instead of
-+using a global offset table. At present, this option implies @option{-fpic},
-+allowing at most a 16-bit offset for pc-relative addressing. @option{-fPIC} is
-+not presently supported with @option{-mpcrel}, though this could be supported for
-+68020 and higher processors.
-+
-+@item -mno-strict-align
-+@itemx -mstrict-align
-+@opindex mno-strict-align
-+@opindex mstrict-align
-+Do not (do) assume that unaligned memory references will be handled by
-+the system.
-+
-+@item -msep-data
-+Generate code that allows the data segment to be located in a different
-+area of memory from the text segment. This allows for execute in place in
-+an environment without virtual memory management. This option implies
-+@option{-fPIC}.
-+
-+@item -mno-sep-data
-+Generate code that assumes that the data segment follows the text segment.
-+This is the default.
-+
-+@item -mid-shared-library
-+Generate code that supports shared libraries via the library ID method.
-+This allows for execute in place and shared libraries in an environment
-+without virtual memory management. This option implies @option{-fPIC}.
-+
-+@item -mno-id-shared-library
-+Generate code that doesn't assume ID based shared libraries are being used.
-+This is the default.
-+
-+@item -mshared-library-id=n
-+Specified the identification number of the ID based shared library being
-+compiled. Specifying a value of 0 will generate more compact code, specifying
-+other values will force the allocation of that number to the current
-+library but is no more space or time efficient than omitting this option.
-+
-+@item -mxgot
-+@itemx -mno-xgot
-+@opindex mxgot
-+@opindex mno-xgot
-+When generating position-independent code for ColdFire, generate code
-+that works if the GOT has more than 8192 entries. This code is
-+larger and slower than code generated without this option. On M680x0
-+processors, this option is not needed; @option{-fPIC} suffices.
-+
-+GCC normally uses a single instruction to load values from the GOT@.
-+While this is relatively efficient, it only works if the GOT
-+is smaller than about 64k. Anything larger causes the linker
-+to report an error such as:
-+
-+@cindex relocation truncated to fit (ColdFire)
-+@smallexample
-+relocation truncated to fit: R_68K_GOT16O foobar
-+@end smallexample
-+
-+If this happens, you should recompile your code with @option{-mxgot}.
-+It should then work with very large GOTs. However, code generated with
-+@option{-mxgot} is less efficient, since it takes 4 instructions to fetch
-+the value of a global symbol.
-+
-+Note that some linkers, including newer versions of the GNU linker,
-+can create multiple GOTs and sort GOT entries. If you have such a linker,
-+you should only need to use @option{-mxgot} when compiling a single
-+object file that accesses more than 8192 GOT entries. Very few do.
-+
-+These options have no effect unless GCC is generating
-+position-independent code.
-+
-+@end table
-+
-+@node M68hc1x Options
-+@subsection M68hc1x Options
-+@cindex M68hc1x options
-+
-+These are the @samp{-m} options defined for the 68hc11 and 68hc12
-+microcontrollers. The default values for these options depends on
-+which style of microcontroller was selected when the compiler was configured;
-+the defaults for the most common choices are given below.
-+
-+@table @gcctabopt
-+@item -m6811
-+@itemx -m68hc11
-+@opindex m6811
-+@opindex m68hc11
-+Generate output for a 68HC11. This is the default
-+when the compiler is configured for 68HC11-based systems.
-+
-+@item -m6812
-+@itemx -m68hc12
-+@opindex m6812
-+@opindex m68hc12
-+Generate output for a 68HC12. This is the default
-+when the compiler is configured for 68HC12-based systems.
-+
-+@item -m68S12
-+@itemx -m68hcs12
-+@opindex m68S12
-+@opindex m68hcs12
-+Generate output for a 68HCS12.
-+
-+@item -mauto-incdec
-+@opindex mauto-incdec
-+Enable the use of 68HC12 pre and post auto-increment and auto-decrement
-+addressing modes.
-+
-+@item -minmax
-+@itemx -nominmax
-+@opindex minmax
-+@opindex mnominmax
-+Enable the use of 68HC12 min and max instructions.
-+
-+@item -mlong-calls
-+@itemx -mno-long-calls
-+@opindex mlong-calls
-+@opindex mno-long-calls
-+Treat all calls as being far away (near). If calls are assumed to be
-+far away, the compiler will use the @code{call} instruction to
-+call a function and the @code{rtc} instruction for returning.
-+
-+@item -mshort
-+@opindex mshort
-+Consider type @code{int} to be 16 bits wide, like @code{short int}.
-+
-+@item -msoft-reg-count=@var{count}
-+@opindex msoft-reg-count
-+Specify the number of pseudo-soft registers which are used for the
-+code generation. The maximum number is 32. Using more pseudo-soft
-+register may or may not result in better code depending on the program.
-+The default is 4 for 68HC11 and 2 for 68HC12.
-+
-+@end table
-+
-+@node MCore Options
-+@subsection MCore Options
-+@cindex MCore options
-+
-+These are the @samp{-m} options defined for the Motorola M*Core
-+processors.
-+
-+@table @gcctabopt
-+
-+@item -mhardlit
-+@itemx -mno-hardlit
-+@opindex mhardlit
-+@opindex mno-hardlit
-+Inline constants into the code stream if it can be done in two
-+instructions or less.
-+
-+@item -mdiv
-+@itemx -mno-div
-+@opindex mdiv
-+@opindex mno-div
-+Use the divide instruction. (Enabled by default).
-+
-+@item -mrelax-immediate
-+@itemx -mno-relax-immediate
-+@opindex mrelax-immediate
-+@opindex mno-relax-immediate
-+Allow arbitrary sized immediates in bit operations.
-+
-+@item -mwide-bitfields
-+@itemx -mno-wide-bitfields
-+@opindex mwide-bitfields
-+@opindex mno-wide-bitfields
-+Always treat bit-fields as int-sized.
-+
-+@item -m4byte-functions
-+@itemx -mno-4byte-functions
-+@opindex m4byte-functions
-+@opindex mno-4byte-functions
-+Force all functions to be aligned to a four byte boundary.
-+
-+@item -mcallgraph-data
-+@itemx -mno-callgraph-data
-+@opindex mcallgraph-data
-+@opindex mno-callgraph-data
-+Emit callgraph information.
-+
-+@item -mslow-bytes
-+@itemx -mno-slow-bytes
-+@opindex mslow-bytes
-+@opindex mno-slow-bytes
-+Prefer word access when reading byte quantities.
-+
-+@item -mlittle-endian
-+@itemx -mbig-endian
-+@opindex mlittle-endian
-+@opindex mbig-endian
-+Generate code for a little endian target.
-+
-+@item -m210
-+@itemx -m340
-+@opindex m210
-+@opindex m340
-+Generate code for the 210 processor.
-+
-+@item -mno-lsim
-+@opindex no-lsim
-+Assume that run-time support has been provided and so omit the
-+simulator library (@file{libsim.a)} from the linker command line.
-+
-+@item -mstack-increment=@var{size}
-+@opindex mstack-increment
-+Set the maximum amount for a single stack increment operation. Large
-+values can increase the speed of programs which contain functions
-+that need a large amount of stack space, but they can also trigger a
-+segmentation fault if the stack is extended too much. The default
-+value is 0x1000.
-+
-+@end table
-+
-+@node MIPS Options
-+@subsection MIPS Options
-+@cindex MIPS options
-+
-+@table @gcctabopt
-+
-+@item -EB
-+@opindex EB
-+Generate big-endian code.
-+
-+@item -EL
-+@opindex EL
-+Generate little-endian code. This is the default for @samp{mips*el-*-*}
-+configurations.
-+
-+@item -march=@var{arch}
-+@opindex march
-+Generate code that will run on @var{arch}, which can be the name of a
-+generic MIPS ISA, or the name of a particular processor.
-+The ISA names are:
-+@samp{mips1}, @samp{mips2}, @samp{mips3}, @samp{mips4},
-+@samp{mips32}, @samp{mips32r2}, @samp{mips64} and @samp{mips64r2}.
-+The processor names are:
-+@samp{4kc}, @samp{4km}, @samp{4kp}, @samp{4ksc},
-+@samp{4kec}, @samp{4kem}, @samp{4kep}, @samp{4ksd},
-+@samp{5kc}, @samp{5kf},
-+@samp{20kc},
-+@samp{24kc}, @samp{24kf2_1}, @samp{24kf1_1},
-+@samp{24kec}, @samp{24kef2_1}, @samp{24kef1_1},
-+@samp{34kc}, @samp{34kf2_1}, @samp{34kf1_1},
-+@samp{74kc}, @samp{74kf2_1}, @samp{74kf1_1}, @samp{74kf3_2},
-+@samp{loongson2e}, @samp{loongson2f},
-+@samp{m4k},
-+@samp{octeon},
-+@samp{orion},
-+@samp{r2000}, @samp{r3000}, @samp{r3900}, @samp{r4000}, @samp{r4400},
-+@samp{r4600}, @samp{r4650}, @samp{r6000}, @samp{r8000},
-+@samp{rm7000}, @samp{rm9000},
-+@samp{r10000}, @samp{r12000}, @samp{r14000}, @samp{r16000},
-+@samp{sb1},
-+@samp{sr71000},
-+@samp{vr4100}, @samp{vr4111}, @samp{vr4120}, @samp{vr4130}, @samp{vr4300},
-+@samp{vr5000}, @samp{vr5400}, @samp{vr5500}
-+and @samp{xlr}.
-+The special value @samp{from-abi} selects the
-+most compatible architecture for the selected ABI (that is,
-+@samp{mips1} for 32-bit ABIs and @samp{mips3} for 64-bit ABIs)@.
-+
-+Native Linux/GNU toolchains also support the value @samp{native},
-+which selects the best architecture option for the host processor.
-+@option{-march=native} has no effect if GCC does not recognize
-+the processor.
-+
-+In processor names, a final @samp{000} can be abbreviated as @samp{k}
-+(for example, @samp{-march=r2k}). Prefixes are optional, and
-+@samp{vr} may be written @samp{r}.
-+
-+Names of the form @samp{@var{n}f2_1} refer to processors with
-+FPUs clocked at half the rate of the core, names of the form
-+@samp{@var{n}f1_1} refer to processors with FPUs clocked at the same
-+rate as the core, and names of the form @samp{@var{n}f3_2} refer to
-+processors with FPUs clocked a ratio of 3:2 with respect to the core.
-+For compatibility reasons, @samp{@var{n}f} is accepted as a synonym
-+for @samp{@var{n}f2_1} while @samp{@var{n}x} and @samp{@var{b}fx} are
-+accepted as synonyms for @samp{@var{n}f1_1}.
-+
-+GCC defines two macros based on the value of this option. The first
-+is @samp{_MIPS_ARCH}, which gives the name of target architecture, as
-+a string. The second has the form @samp{_MIPS_ARCH_@var{foo}},
-+where @var{foo} is the capitalized value of @samp{_MIPS_ARCH}@.
-+For example, @samp{-march=r2000} will set @samp{_MIPS_ARCH}
-+to @samp{"r2000"} and define the macro @samp{_MIPS_ARCH_R2000}.
-+
-+Note that the @samp{_MIPS_ARCH} macro uses the processor names given
-+above. In other words, it will have the full prefix and will not
-+abbreviate @samp{000} as @samp{k}. In the case of @samp{from-abi},
-+the macro names the resolved architecture (either @samp{"mips1"} or
-+@samp{"mips3"}). It names the default architecture when no
-+@option{-march} option is given.
-+
-+@item -mtune=@var{arch}
-+@opindex mtune
-+Optimize for @var{arch}. Among other things, this option controls
-+the way instructions are scheduled, and the perceived cost of arithmetic
-+operations. The list of @var{arch} values is the same as for
-+@option{-march}.
-+
-+When this option is not used, GCC will optimize for the processor
-+specified by @option{-march}. By using @option{-march} and
-+@option{-mtune} together, it is possible to generate code that will
-+run on a family of processors, but optimize the code for one
-+particular member of that family.
-+
-+@samp{-mtune} defines the macros @samp{_MIPS_TUNE} and
-+@samp{_MIPS_TUNE_@var{foo}}, which work in the same way as the
-+@samp{-march} ones described above.
-+
-+@item -mips1
-+@opindex mips1
-+Equivalent to @samp{-march=mips1}.
-+
-+@item -mips2
-+@opindex mips2
-+Equivalent to @samp{-march=mips2}.
-+
-+@item -mips3
-+@opindex mips3
-+Equivalent to @samp{-march=mips3}.
-+
-+@item -mips4
-+@opindex mips4
-+Equivalent to @samp{-march=mips4}.
-+
-+@item -mips32
-+@opindex mips32
-+Equivalent to @samp{-march=mips32}.
-+
-+@item -mips32r2
-+@opindex mips32r2
-+Equivalent to @samp{-march=mips32r2}.
-+
-+@item -mips64
-+@opindex mips64
-+Equivalent to @samp{-march=mips64}.
-+
-+@item -mips64r2
-+@opindex mips64r2
-+Equivalent to @samp{-march=mips64r2}.
-+
-+@item -mips16
-+@itemx -mno-mips16
-+@opindex mips16
-+@opindex mno-mips16
-+Generate (do not generate) MIPS16 code. If GCC is targetting a
-+MIPS32 or MIPS64 architecture, it will make use of the MIPS16e ASE@.
-+
-+MIPS16 code generation can also be controlled on a per-function basis
-+by means of @code{mips16} and @code{nomips16} attributes.
-+@xref{Function Attributes}, for more information.
-+
-+@item -mflip-mips16
-+@opindex mflip-mips16
-+Generate MIPS16 code on alternating functions. This option is provided
-+for regression testing of mixed MIPS16/non-MIPS16 code generation, and is
-+not intended for ordinary use in compiling user code.
-+
-+@item -minterlink-mips16
-+@itemx -mno-interlink-mips16
-+@opindex minterlink-mips16
-+@opindex mno-interlink-mips16
-+Require (do not require) that non-MIPS16 code be link-compatible with
-+MIPS16 code.
-+
-+For example, non-MIPS16 code cannot jump directly to MIPS16 code;
-+it must either use a call or an indirect jump. @option{-minterlink-mips16}
-+therefore disables direct jumps unless GCC knows that the target of the
-+jump is not MIPS16.
-+
-+@item -mabi=32
-+@itemx -mabi=o64
-+@itemx -mabi=n32
-+@itemx -mabi=64
-+@itemx -mabi=eabi
-+@opindex mabi=32
-+@opindex mabi=o64
-+@opindex mabi=n32
-+@opindex mabi=64
-+@opindex mabi=eabi
-+Generate code for the given ABI@.
-+
-+Note that the EABI has a 32-bit and a 64-bit variant. GCC normally
-+generates 64-bit code when you select a 64-bit architecture, but you
-+can use @option{-mgp32} to get 32-bit code instead.
-+
-+For information about the O64 ABI, see
-+@w{@uref{http://gcc.gnu.org/projects/mipso64-abi.html}}.
-+
-+GCC supports a variant of the o32 ABI in which floating-point registers
-+are 64 rather than 32 bits wide. You can select this combination with
-+@option{-mabi=32} @option{-mfp64}. This ABI relies on the @samp{mthc1}
-+and @samp{mfhc1} instructions and is therefore only supported for
-+MIPS32R2 processors.
-+
-+The register assignments for arguments and return values remain the
-+same, but each scalar value is passed in a single 64-bit register
-+rather than a pair of 32-bit registers. For example, scalar
-+floating-point values are returned in @samp{$f0} only, not a
-+@samp{$f0}/@samp{$f1} pair. The set of call-saved registers also
-+remains the same, but all 64 bits are saved.
-+
-+@item -mabicalls
-+@itemx -mno-abicalls
-+@opindex mabicalls
-+@opindex mno-abicalls
-+Generate (do not generate) code that is suitable for SVR4-style
-+dynamic objects. @option{-mabicalls} is the default for SVR4-based
-+systems.
-+
-+@item -mshared
-+@itemx -mno-shared
-+Generate (do not generate) code that is fully position-independent,
-+and that can therefore be linked into shared libraries. This option
-+only affects @option{-mabicalls}.
-+
-+All @option{-mabicalls} code has traditionally been position-independent,
-+regardless of options like @option{-fPIC} and @option{-fpic}. However,
-+as an extension, the GNU toolchain allows executables to use absolute
-+accesses for locally-binding symbols. It can also use shorter GP
-+initialization sequences and generate direct calls to locally-defined
-+functions. This mode is selected by @option{-mno-shared}.
-+
-+@option{-mno-shared} depends on binutils 2.16 or higher and generates
-+objects that can only be linked by the GNU linker. However, the option
-+does not affect the ABI of the final executable; it only affects the ABI
-+of relocatable objects. Using @option{-mno-shared} will generally make
-+executables both smaller and quicker.
-+
-+@option{-mshared} is the default.
-+
-+@item -mplt
-+@itemx -mno-plt
-+@opindex mplt
-+@opindex mno-plt
-+Assume (do not assume) that the static and dynamic linkers
-+support PLTs and copy relocations. This option only affects
-+@samp{-mno-shared -mabicalls}. For the n64 ABI, this option
-+has no effect without @samp{-msym32}.
-+
-+You can make @option{-mplt} the default by configuring
-+GCC with @option{--with-mips-plt}. The default is
-+@option{-mno-plt} otherwise.
-+
-+@item -mxgot
-+@itemx -mno-xgot
-+@opindex mxgot
-+@opindex mno-xgot
-+Lift (do not lift) the usual restrictions on the size of the global
-+offset table.
-+
-+GCC normally uses a single instruction to load values from the GOT@.
-+While this is relatively efficient, it will only work if the GOT
-+is smaller than about 64k. Anything larger will cause the linker
-+to report an error such as:
-+
-+@cindex relocation truncated to fit (MIPS)
-+@smallexample
-+relocation truncated to fit: R_MIPS_GOT16 foobar
-+@end smallexample
-+
-+If this happens, you should recompile your code with @option{-mxgot}.
-+It should then work with very large GOTs, although it will also be
-+less efficient, since it will take three instructions to fetch the
-+value of a global symbol.
-+
-+Note that some linkers can create multiple GOTs. If you have such a
-+linker, you should only need to use @option{-mxgot} when a single object
-+file accesses more than 64k's worth of GOT entries. Very few do.
-+
-+These options have no effect unless GCC is generating position
-+independent code.
-+
-+@item -mgp32
-+@opindex mgp32
-+Assume that general-purpose registers are 32 bits wide.
-+
-+@item -mgp64
-+@opindex mgp64
-+Assume that general-purpose registers are 64 bits wide.
-+
-+@item -mfp32
-+@opindex mfp32
-+Assume that floating-point registers are 32 bits wide.
-+
-+@item -mfp64
-+@opindex mfp64
-+Assume that floating-point registers are 64 bits wide.
-+
-+@item -mhard-float
-+@opindex mhard-float
-+Use floating-point coprocessor instructions.
-+
-+@item -msoft-float
-+@opindex msoft-float
-+Do not use floating-point coprocessor instructions. Implement
-+floating-point calculations using library calls instead.
-+
-+@item -msingle-float
-+@opindex msingle-float
-+Assume that the floating-point coprocessor only supports single-precision
-+operations.
-+
-+@item -mdouble-float
-+@opindex mdouble-float
-+Assume that the floating-point coprocessor supports double-precision
-+operations. This is the default.
-+
-+@item -mllsc
-+@itemx -mno-llsc
-+@opindex mllsc
-+@opindex mno-llsc
-+Use (do not use) @samp{ll}, @samp{sc}, and @samp{sync} instructions to
-+implement atomic memory built-in functions. When neither option is
-+specified, GCC will use the instructions if the target architecture
-+supports them.
-+
-+@option{-mllsc} is useful if the runtime environment can emulate the
-+instructions and @option{-mno-llsc} can be useful when compiling for
-+nonstandard ISAs. You can make either option the default by
-+configuring GCC with @option{--with-llsc} and @option{--without-llsc}
-+respectively. @option{--with-llsc} is the default for some
-+configurations; see the installation documentation for details.
-+
-+@item -mdsp
-+@itemx -mno-dsp
-+@opindex mdsp
-+@opindex mno-dsp
-+Use (do not use) revision 1 of the MIPS DSP ASE@.
-+@xref{MIPS DSP Built-in Functions}. This option defines the
-+preprocessor macro @samp{__mips_dsp}. It also defines
-+@samp{__mips_dsp_rev} to 1.
-+
-+@item -mdspr2
-+@itemx -mno-dspr2
-+@opindex mdspr2
-+@opindex mno-dspr2
-+Use (do not use) revision 2 of the MIPS DSP ASE@.
-+@xref{MIPS DSP Built-in Functions}. This option defines the
-+preprocessor macros @samp{__mips_dsp} and @samp{__mips_dspr2}.
-+It also defines @samp{__mips_dsp_rev} to 2.
-+
-+@item -msmartmips
-+@itemx -mno-smartmips
-+@opindex msmartmips
-+@opindex mno-smartmips
-+Use (do not use) the MIPS SmartMIPS ASE.
-+
-+@item -mpaired-single
-+@itemx -mno-paired-single
-+@opindex mpaired-single
-+@opindex mno-paired-single
-+Use (do not use) paired-single floating-point instructions.
-+@xref{MIPS Paired-Single Support}. This option requires
-+hardware floating-point support to be enabled.
-+
-+@item -mdmx
-+@itemx -mno-mdmx
-+@opindex mdmx
-+@opindex mno-mdmx
-+Use (do not use) MIPS Digital Media Extension instructions.
-+This option can only be used when generating 64-bit code and requires
-+hardware floating-point support to be enabled.
-+
-+@item -mips3d
-+@itemx -mno-mips3d
-+@opindex mips3d
-+@opindex mno-mips3d
-+Use (do not use) the MIPS-3D ASE@. @xref{MIPS-3D Built-in Functions}.
-+The option @option{-mips3d} implies @option{-mpaired-single}.
-+
-+@item -mmt
-+@itemx -mno-mt
-+@opindex mmt
-+@opindex mno-mt
-+Use (do not use) MT Multithreading instructions.
-+
-+@item -mlong64
-+@opindex mlong64
-+Force @code{long} types to be 64 bits wide. See @option{-mlong32} for
-+an explanation of the default and the way that the pointer size is
-+determined.
-+
-+@item -mlong32
-+@opindex mlong32
-+Force @code{long}, @code{int}, and pointer types to be 32 bits wide.
-+
-+The default size of @code{int}s, @code{long}s and pointers depends on
-+the ABI@. All the supported ABIs use 32-bit @code{int}s. The n64 ABI
-+uses 64-bit @code{long}s, as does the 64-bit EABI; the others use
-+32-bit @code{long}s. Pointers are the same size as @code{long}s,
-+or the same size as integer registers, whichever is smaller.
-+
-+@item -msym32
-+@itemx -mno-sym32
-+@opindex msym32
-+@opindex mno-sym32
-+Assume (do not assume) that all symbols have 32-bit values, regardless
-+of the selected ABI@. This option is useful in combination with
-+@option{-mabi=64} and @option{-mno-abicalls} because it allows GCC
-+to generate shorter and faster references to symbolic addresses.
-+
-+@item -G @var{num}
-+@opindex G
-+Put definitions of externally-visible data in a small data section
-+if that data is no bigger than @var{num} bytes. GCC can then access
-+the data more efficiently; see @option{-mgpopt} for details.
-+
-+The default @option{-G} option depends on the configuration.
-+
-+@item -mlocal-sdata
-+@itemx -mno-local-sdata
-+@opindex mlocal-sdata
-+@opindex mno-local-sdata
-+Extend (do not extend) the @option{-G} behavior to local data too,
-+such as to static variables in C@. @option{-mlocal-sdata} is the
-+default for all configurations.
-+
-+If the linker complains that an application is using too much small data,
-+you might want to try rebuilding the less performance-critical parts with
-+@option{-mno-local-sdata}. You might also want to build large
-+libraries with @option{-mno-local-sdata}, so that the libraries leave
-+more room for the main program.
-+
-+@item -mextern-sdata
-+@itemx -mno-extern-sdata
-+@opindex mextern-sdata
-+@opindex mno-extern-sdata
-+Assume (do not assume) that externally-defined data will be in
-+a small data section if that data is within the @option{-G} limit.
-+@option{-mextern-sdata} is the default for all configurations.
-+
-+If you compile a module @var{Mod} with @option{-mextern-sdata} @option{-G
-+@var{num}} @option{-mgpopt}, and @var{Mod} references a variable @var{Var}
-+that is no bigger than @var{num} bytes, you must make sure that @var{Var}
-+is placed in a small data section. If @var{Var} is defined by another
-+module, you must either compile that module with a high-enough
-+@option{-G} setting or attach a @code{section} attribute to @var{Var}'s
-+definition. If @var{Var} is common, you must link the application
-+with a high-enough @option{-G} setting.
-+
-+The easiest way of satisfying these restrictions is to compile
-+and link every module with the same @option{-G} option. However,
-+you may wish to build a library that supports several different
-+small data limits. You can do this by compiling the library with
-+the highest supported @option{-G} setting and additionally using
-+@option{-mno-extern-sdata} to stop the library from making assumptions
-+about externally-defined data.
-+
-+@item -mgpopt
-+@itemx -mno-gpopt
-+@opindex mgpopt
-+@opindex mno-gpopt
-+Use (do not use) GP-relative accesses for symbols that are known to be
-+in a small data section; see @option{-G}, @option{-mlocal-sdata} and
-+@option{-mextern-sdata}. @option{-mgpopt} is the default for all
-+configurations.
-+
-+@option{-mno-gpopt} is useful for cases where the @code{$gp} register
-+might not hold the value of @code{_gp}. For example, if the code is
-+part of a library that might be used in a boot monitor, programs that
-+call boot monitor routines will pass an unknown value in @code{$gp}.
-+(In such situations, the boot monitor itself would usually be compiled
-+with @option{-G0}.)
-+
-+@option{-mno-gpopt} implies @option{-mno-local-sdata} and
-+@option{-mno-extern-sdata}.
-+
-+@item -membedded-data
-+@itemx -mno-embedded-data
-+@opindex membedded-data
-+@opindex mno-embedded-data
-+Allocate variables to the read-only data section first if possible, then
-+next in the small data section if possible, otherwise in data. This gives
-+slightly slower code than the default, but reduces the amount of RAM required
-+when executing, and thus may be preferred for some embedded systems.
-+
-+@item -muninit-const-in-rodata
-+@itemx -mno-uninit-const-in-rodata
-+@opindex muninit-const-in-rodata
-+@opindex mno-uninit-const-in-rodata
-+Put uninitialized @code{const} variables in the read-only data section.
-+This option is only meaningful in conjunction with @option{-membedded-data}.
-+
-+@item -mcode-readable=@var{setting}
-+@opindex mcode-readable
-+Specify whether GCC may generate code that reads from executable sections.
-+There are three possible settings:
-+
-+@table @gcctabopt
-+@item -mcode-readable=yes
-+Instructions may freely access executable sections. This is the
-+default setting.
-+
-+@item -mcode-readable=pcrel
-+MIPS16 PC-relative load instructions can access executable sections,
-+but other instructions must not do so. This option is useful on 4KSc
-+and 4KSd processors when the code TLBs have the Read Inhibit bit set.
-+It is also useful on processors that can be configured to have a dual
-+instruction/data SRAM interface and that, like the M4K, automatically
-+redirect PC-relative loads to the instruction RAM.
-+
-+@item -mcode-readable=no
-+Instructions must not access executable sections. This option can be
-+useful on targets that are configured to have a dual instruction/data
-+SRAM interface but that (unlike the M4K) do not automatically redirect
-+PC-relative loads to the instruction RAM.
-+@end table
-+
-+@item -msplit-addresses
-+@itemx -mno-split-addresses
-+@opindex msplit-addresses
-+@opindex mno-split-addresses
-+Enable (disable) use of the @code{%hi()} and @code{%lo()} assembler
-+relocation operators. This option has been superseded by
-+@option{-mexplicit-relocs} but is retained for backwards compatibility.
-+
-+@item -mexplicit-relocs
-+@itemx -mno-explicit-relocs
-+@opindex mexplicit-relocs
-+@opindex mno-explicit-relocs
-+Use (do not use) assembler relocation operators when dealing with symbolic
-+addresses. The alternative, selected by @option{-mno-explicit-relocs},
-+is to use assembler macros instead.
-+
-+@option{-mexplicit-relocs} is the default if GCC was configured
-+to use an assembler that supports relocation operators.
-+
-+@item -mcheck-zero-division
-+@itemx -mno-check-zero-division
-+@opindex mcheck-zero-division
-+@opindex mno-check-zero-division
-+Trap (do not trap) on integer division by zero.
-+
-+The default is @option{-mcheck-zero-division}.
-+
-+@item -mdivide-traps
-+@itemx -mdivide-breaks
-+@opindex mdivide-traps
-+@opindex mdivide-breaks
-+MIPS systems check for division by zero by generating either a
-+conditional trap or a break instruction. Using traps results in
-+smaller code, but is only supported on MIPS II and later. Also, some
-+versions of the Linux kernel have a bug that prevents trap from
-+generating the proper signal (@code{SIGFPE}). Use @option{-mdivide-traps} to
-+allow conditional traps on architectures that support them and
-+@option{-mdivide-breaks} to force the use of breaks.
-+
-+The default is usually @option{-mdivide-traps}, but this can be
-+overridden at configure time using @option{--with-divide=breaks}.
-+Divide-by-zero checks can be completely disabled using
-+@option{-mno-check-zero-division}.
-+
-+@item -mmemcpy
-+@itemx -mno-memcpy
-+@opindex mmemcpy
-+@opindex mno-memcpy
-+Force (do not force) the use of @code{memcpy()} for non-trivial block
-+moves. The default is @option{-mno-memcpy}, which allows GCC to inline
-+most constant-sized copies.
-+
-+@item -mlong-calls
-+@itemx -mno-long-calls
-+@opindex mlong-calls
-+@opindex mno-long-calls
-+Disable (do not disable) use of the @code{jal} instruction. Calling
-+functions using @code{jal} is more efficient but requires the caller
-+and callee to be in the same 256 megabyte segment.
-+
-+This option has no effect on abicalls code. The default is
-+@option{-mno-long-calls}.
-+
-+@item -mmad
-+@itemx -mno-mad
-+@opindex mmad
-+@opindex mno-mad
-+Enable (disable) use of the @code{mad}, @code{madu} and @code{mul}
-+instructions, as provided by the R4650 ISA@.
-+
-+@item -mfused-madd
-+@itemx -mno-fused-madd
-+@opindex mfused-madd
-+@opindex mno-fused-madd
-+Enable (disable) use of the floating point multiply-accumulate
-+instructions, when they are available. The default is
-+@option{-mfused-madd}.
-+
-+When multiply-accumulate instructions are used, the intermediate
-+product is calculated to infinite precision and is not subject to
-+the FCSR Flush to Zero bit. This may be undesirable in some
-+circumstances.
-+
-+@item -nocpp
-+@opindex nocpp
-+Tell the MIPS assembler to not run its preprocessor over user
-+assembler files (with a @samp{.s} suffix) when assembling them.
-+
-+@item -mfix-r4000
-+@itemx -mno-fix-r4000
-+@opindex mfix-r4000
-+@opindex mno-fix-r4000
-+Work around certain R4000 CPU errata:
-+@itemize @minus
-+@item
-+A double-word or a variable shift may give an incorrect result if executed
-+immediately after starting an integer division.
-+@item
-+A double-word or a variable shift may give an incorrect result if executed
-+while an integer multiplication is in progress.
-+@item
-+An integer division may give an incorrect result if started in a delay slot
-+of a taken branch or a jump.
-+@end itemize
-+
-+@item -mfix-r4400
-+@itemx -mno-fix-r4400
-+@opindex mfix-r4400
-+@opindex mno-fix-r4400
-+Work around certain R4400 CPU errata:
-+@itemize @minus
-+@item
-+A double-word or a variable shift may give an incorrect result if executed
-+immediately after starting an integer division.
-+@end itemize
-+
-+@item -mfix-r10000
-+@itemx -mno-fix-r10000
-+@opindex mfix-r10000
-+@opindex mno-fix-r10000
-+Work around certain R10000 errata:
-+@itemize @minus
-+@item
-+@code{ll}/@code{sc} sequences may not behave atomically on revisions
-+prior to 3.0. They may deadlock on revisions 2.6 and earlier.
-+@end itemize
-+
-+This option can only be used if the target architecture supports
-+branch-likely instructions. @option{-mfix-r10000} is the default when
-+@option{-march=r10000} is used; @option{-mno-fix-r10000} is the default
-+otherwise.
-+
-+@item -mfix-vr4120
-+@itemx -mno-fix-vr4120
-+@opindex mfix-vr4120
-+Work around certain VR4120 errata:
-+@itemize @minus
-+@item
-+@code{dmultu} does not always produce the correct result.
-+@item
-+@code{div} and @code{ddiv} do not always produce the correct result if one
-+of the operands is negative.
-+@end itemize
-+The workarounds for the division errata rely on special functions in
-+@file{libgcc.a}. At present, these functions are only provided by
-+the @code{mips64vr*-elf} configurations.
-+
-+Other VR4120 errata require a nop to be inserted between certain pairs of
-+instructions. These errata are handled by the assembler, not by GCC itself.
-+
-+@item -mfix-vr4130
-+@opindex mfix-vr4130
-+Work around the VR4130 @code{mflo}/@code{mfhi} errata. The
-+workarounds are implemented by the assembler rather than by GCC,
-+although GCC will avoid using @code{mflo} and @code{mfhi} if the
-+VR4130 @code{macc}, @code{macchi}, @code{dmacc} and @code{dmacchi}
-+instructions are available instead.
-+
-+@item -mfix-sb1
-+@itemx -mno-fix-sb1
-+@opindex mfix-sb1
-+Work around certain SB-1 CPU core errata.
-+(This flag currently works around the SB-1 revision 2
-+``F1'' and ``F2'' floating point errata.)
-+
-+@item -mr10k-cache-barrier=@var{setting}
-+@opindex mr10k-cache-barrier
-+Specify whether GCC should insert cache barriers to avoid the
-+side-effects of speculation on R10K processors.
-+
-+In common with many processors, the R10K tries to predict the outcome
-+of a conditional branch and speculatively executes instructions from
-+the ``taken'' branch. It later aborts these instructions if the
-+predicted outcome was wrong. However, on the R10K, even aborted
-+instructions can have side effects.
-+
-+This problem only affects kernel stores and, depending on the system,
-+kernel loads. As an example, a speculatively-executed store may load
-+the target memory into cache and mark the cache line as dirty, even if
-+the store itself is later aborted. If a DMA operation writes to the
-+same area of memory before the ``dirty'' line is flushed, the cached
-+data will overwrite the DMA-ed data. See the R10K processor manual
-+for a full description, including other potential problems.
-+
-+One workaround is to insert cache barrier instructions before every memory
-+access that might be speculatively executed and that might have side
-+effects even if aborted. @option{-mr10k-cache-barrier=@var{setting}}
-+controls GCC's implementation of this workaround. It assumes that
-+aborted accesses to any byte in the following regions will not have
-+side effects:
-+
-+@enumerate
-+@item
-+the memory occupied by the current function's stack frame;
-+
-+@item
-+the memory occupied by an incoming stack argument;
-+
-+@item
-+the memory occupied by an object with a link-time-constant address.
-+@end enumerate
-+
-+It is the kernel's responsibility to ensure that speculative
-+accesses to these regions are indeed safe.
-+
-+If the input program contains a function declaration such as:
-+
-+@smallexample
-+void foo (void);
-+@end smallexample
-+
-+then the implementation of @code{foo} must allow @code{j foo} and
-+@code{jal foo} to be executed speculatively. GCC honors this
-+restriction for functions it compiles itself. It expects non-GCC
-+functions (such as hand-written assembly code) to do the same.
-+
-+The option has three forms:
-+
-+@table @gcctabopt
-+@item -mr10k-cache-barrier=load-store
-+Insert a cache barrier before a load or store that might be
-+speculatively executed and that might have side effects even
-+if aborted.
-+
-+@item -mr10k-cache-barrier=store
-+Insert a cache barrier before a store that might be speculatively
-+executed and that might have side effects even if aborted.
-+
-+@item -mr10k-cache-barrier=none
-+Disable the insertion of cache barriers. This is the default setting.
-+@end table
-+
-+@item -mflush-func=@var{func}
-+@itemx -mno-flush-func
-+@opindex mflush-func
-+Specifies the function to call to flush the I and D caches, or to not
-+call any such function. If called, the function must take the same
-+arguments as the common @code{_flush_func()}, that is, the address of the
-+memory range for which the cache is being flushed, the size of the
-+memory range, and the number 3 (to flush both caches). The default
-+depends on the target GCC was configured for, but commonly is either
-+@samp{_flush_func} or @samp{__cpu_flush}.
-+
-+@item mbranch-cost=@var{num}
-+@opindex mbranch-cost
-+Set the cost of branches to roughly @var{num} ``simple'' instructions.
-+This cost is only a heuristic and is not guaranteed to produce
-+consistent results across releases. A zero cost redundantly selects
-+the default, which is based on the @option{-mtune} setting.
-+
-+@item -mbranch-likely
-+@itemx -mno-branch-likely
-+@opindex mbranch-likely
-+@opindex mno-branch-likely
-+Enable or disable use of Branch Likely instructions, regardless of the
-+default for the selected architecture. By default, Branch Likely
-+instructions may be generated if they are supported by the selected
-+architecture. An exception is for the MIPS32 and MIPS64 architectures
-+and processors which implement those architectures; for those, Branch
-+Likely instructions will not be generated by default because the MIPS32
-+and MIPS64 architectures specifically deprecate their use.
-+
-+@item -mfp-exceptions
-+@itemx -mno-fp-exceptions
-+@opindex mfp-exceptions
-+Specifies whether FP exceptions are enabled. This affects how we schedule
-+FP instructions for some processors. The default is that FP exceptions are
-+enabled.
-+
-+For instance, on the SB-1, if FP exceptions are disabled, and we are emitting
-+64-bit code, then we can use both FP pipes. Otherwise, we can only use one
-+FP pipe.
-+
-+@item -mvr4130-align
-+@itemx -mno-vr4130-align
-+@opindex mvr4130-align
-+The VR4130 pipeline is two-way superscalar, but can only issue two
-+instructions together if the first one is 8-byte aligned. When this
-+option is enabled, GCC will align pairs of instructions that it
-+thinks should execute in parallel.
-+
-+This option only has an effect when optimizing for the VR4130.
-+It normally makes code faster, but at the expense of making it bigger.
-+It is enabled by default at optimization level @option{-O3}.
-+@end table
-+
-+@node MMIX Options
-+@subsection MMIX Options
-+@cindex MMIX Options
-+
-+These options are defined for the MMIX:
-+
-+@table @gcctabopt
-+@item -mlibfuncs
-+@itemx -mno-libfuncs
-+@opindex mlibfuncs
-+@opindex mno-libfuncs
-+Specify that intrinsic library functions are being compiled, passing all
-+values in registers, no matter the size.
-+
-+@item -mepsilon
-+@itemx -mno-epsilon
-+@opindex mepsilon
-+@opindex mno-epsilon
-+Generate floating-point comparison instructions that compare with respect
-+to the @code{rE} epsilon register.
-+
-+@item -mabi=mmixware
-+@itemx -mabi=gnu
-+@opindex mabi-mmixware
-+@opindex mabi=gnu
-+Generate code that passes function parameters and return values that (in
-+the called function) are seen as registers @code{$0} and up, as opposed to
-+the GNU ABI which uses global registers @code{$231} and up.
-+
-+@item -mzero-extend
-+@itemx -mno-zero-extend
-+@opindex mzero-extend
-+@opindex mno-zero-extend
-+When reading data from memory in sizes shorter than 64 bits, use (do not
-+use) zero-extending load instructions by default, rather than
-+sign-extending ones.
-+
-+@item -mknuthdiv
-+@itemx -mno-knuthdiv
-+@opindex mknuthdiv
-+@opindex mno-knuthdiv
-+Make the result of a division yielding a remainder have the same sign as
-+the divisor. With the default, @option{-mno-knuthdiv}, the sign of the
-+remainder follows the sign of the dividend. Both methods are
-+arithmetically valid, the latter being almost exclusively used.
-+
-+@item -mtoplevel-symbols
-+@itemx -mno-toplevel-symbols
-+@opindex mtoplevel-symbols
-+@opindex mno-toplevel-symbols
-+Prepend (do not prepend) a @samp{:} to all global symbols, so the assembly
-+code can be used with the @code{PREFIX} assembly directive.
-+
-+@item -melf
-+@opindex melf
-+Generate an executable in the ELF format, rather than the default
-+@samp{mmo} format used by the @command{mmix} simulator.
-+
-+@item -mbranch-predict
-+@itemx -mno-branch-predict
-+@opindex mbranch-predict
-+@opindex mno-branch-predict
-+Use (do not use) the probable-branch instructions, when static branch
-+prediction indicates a probable branch.
-+
-+@item -mbase-addresses
-+@itemx -mno-base-addresses
-+@opindex mbase-addresses
-+@opindex mno-base-addresses
-+Generate (do not generate) code that uses @emph{base addresses}. Using a
-+base address automatically generates a request (handled by the assembler
-+and the linker) for a constant to be set up in a global register. The
-+register is used for one or more base address requests within the range 0
-+to 255 from the value held in the register. The generally leads to short
-+and fast code, but the number of different data items that can be
-+addressed is limited. This means that a program that uses lots of static
-+data may require @option{-mno-base-addresses}.
-+
-+@item -msingle-exit
-+@itemx -mno-single-exit
-+@opindex msingle-exit
-+@opindex mno-single-exit
-+Force (do not force) generated code to have a single exit point in each
-+function.
-+@end table
-+
-+@node MN10300 Options
-+@subsection MN10300 Options
-+@cindex MN10300 options
-+
-+These @option{-m} options are defined for Matsushita MN10300 architectures:
-+
-+@table @gcctabopt
-+@item -mmult-bug
-+@opindex mmult-bug
-+Generate code to avoid bugs in the multiply instructions for the MN10300
-+processors. This is the default.
-+
-+@item -mno-mult-bug
-+@opindex mno-mult-bug
-+Do not generate code to avoid bugs in the multiply instructions for the
-+MN10300 processors.
-+
-+@item -mam33
-+@opindex mam33
-+Generate code which uses features specific to the AM33 processor.
-+
-+@item -mno-am33
-+@opindex mno-am33
-+Do not generate code which uses features specific to the AM33 processor. This
-+is the default.
-+
-+@item -mreturn-pointer-on-d0
-+@opindex mreturn-pointer-on-d0
-+When generating a function which returns a pointer, return the pointer
-+in both @code{a0} and @code{d0}. Otherwise, the pointer is returned
-+only in a0, and attempts to call such functions without a prototype
-+would result in errors. Note that this option is on by default; use
-+@option{-mno-return-pointer-on-d0} to disable it.
-+
-+@item -mno-crt0
-+@opindex mno-crt0
-+Do not link in the C run-time initialization object file.
-+
-+@item -mrelax
-+@opindex mrelax
-+Indicate to the linker that it should perform a relaxation optimization pass
-+to shorten branches, calls and absolute memory addresses. This option only
-+has an effect when used on the command line for the final link step.
-+
-+This option makes symbolic debugging impossible.
-+@end table
-+
-+@node PDP-11 Options
-+@subsection PDP-11 Options
-+@cindex PDP-11 Options
-+
-+These options are defined for the PDP-11:
-+
-+@table @gcctabopt
-+@item -mfpu
-+@opindex mfpu
-+Use hardware FPP floating point. This is the default. (FIS floating
-+point on the PDP-11/40 is not supported.)
-+
-+@item -msoft-float
-+@opindex msoft-float
-+Do not use hardware floating point.
-+
-+@item -mac0
-+@opindex mac0
-+Return floating-point results in ac0 (fr0 in Unix assembler syntax).
-+
-+@item -mno-ac0
-+@opindex mno-ac0
-+Return floating-point results in memory. This is the default.
-+
-+@item -m40
-+@opindex m40
-+Generate code for a PDP-11/40.
-+
-+@item -m45
-+@opindex m45
-+Generate code for a PDP-11/45. This is the default.
-+
-+@item -m10
-+@opindex m10
-+Generate code for a PDP-11/10.
-+
-+@item -mbcopy-builtin
-+@opindex bcopy-builtin
-+Use inline @code{movmemhi} patterns for copying memory. This is the
-+default.
-+
-+@item -mbcopy
-+@opindex mbcopy
-+Do not use inline @code{movmemhi} patterns for copying memory.
-+
-+@item -mint16
-+@itemx -mno-int32
-+@opindex mint16
-+@opindex mno-int32
-+Use 16-bit @code{int}. This is the default.
-+
-+@item -mint32
-+@itemx -mno-int16
-+@opindex mint32
-+@opindex mno-int16
-+Use 32-bit @code{int}.
-+
-+@item -mfloat64
-+@itemx -mno-float32
-+@opindex mfloat64
-+@opindex mno-float32
-+Use 64-bit @code{float}. This is the default.
-+
-+@item -mfloat32
-+@itemx -mno-float64
-+@opindex mfloat32
-+@opindex mno-float64
-+Use 32-bit @code{float}.
-+
-+@item -mabshi
-+@opindex mabshi
-+Use @code{abshi2} pattern. This is the default.
-+
-+@item -mno-abshi
-+@opindex mno-abshi
-+Do not use @code{abshi2} pattern.
-+
-+@item -mbranch-expensive
-+@opindex mbranch-expensive
-+Pretend that branches are expensive. This is for experimenting with
-+code generation only.
-+
-+@item -mbranch-cheap
-+@opindex mbranch-cheap
-+Do not pretend that branches are expensive. This is the default.
-+
-+@item -msplit
-+@opindex msplit
-+Generate code for a system with split I&D@.
-+
-+@item -mno-split
-+@opindex mno-split
-+Generate code for a system without split I&D@. This is the default.
-+
-+@item -munix-asm
-+@opindex munix-asm
-+Use Unix assembler syntax. This is the default when configured for
-+@samp{pdp11-*-bsd}.
-+
-+@item -mdec-asm
-+@opindex mdec-asm
-+Use DEC assembler syntax. This is the default when configured for any
-+PDP-11 target other than @samp{pdp11-*-bsd}.
-+@end table
-+
-+@node picoChip Options
-+@subsection picoChip Options
-+@cindex picoChip options
-+
-+These @samp{-m} options are defined for picoChip implementations:
-+
-+@table @gcctabopt
-+
-+@item -mae=@var{ae_type}
-+@opindex mcpu
-+Set the instruction set, register set, and instruction scheduling
-+parameters for array element type @var{ae_type}. Supported values
-+for @var{ae_type} are @samp{ANY}, @samp{MUL}, and @samp{MAC}.
-+
-+@option{-mae=ANY} selects a completely generic AE type. Code
-+generated with this option will run on any of the other AE types. The
-+code will not be as efficient as it would be if compiled for a specific
-+AE type, and some types of operation (e.g., multiplication) will not
-+work properly on all types of AE.
-+
-+@option{-mae=MUL} selects a MUL AE type. This is the most useful AE type
-+for compiled code, and is the default.
-+
-+@option{-mae=MAC} selects a DSP-style MAC AE. Code compiled with this
-+option may suffer from poor performance of byte (char) manipulation,
-+since the DSP AE does not provide hardware support for byte load/stores.
-+
-+@item -msymbol-as-address
-+Enable the compiler to directly use a symbol name as an address in a
-+load/store instruction, without first loading it into a
-+register. Typically, the use of this option will generate larger
-+programs, which run faster than when the option isn't used. However, the
-+results vary from program to program, so it is left as a user option,
-+rather than being permanently enabled.
-+
-+@item -mno-inefficient-warnings
-+Disables warnings about the generation of inefficient code. These
-+warnings can be generated, for example, when compiling code which
-+performs byte-level memory operations on the MAC AE type. The MAC AE has
-+no hardware support for byte-level memory operations, so all byte
-+load/stores must be synthesized from word load/store operations. This is
-+inefficient and a warning will be generated indicating to the programmer
-+that they should rewrite the code to avoid byte operations, or to target
-+an AE type which has the necessary hardware support. This option enables
-+the warning to be turned off.
-+
-+@end table
-+
-+@node PowerPC Options
-+@subsection PowerPC Options
-+@cindex PowerPC options
-+
-+These are listed under @xref{RS/6000 and PowerPC Options}.
-+
-+@node RS/6000 and PowerPC Options
-+@subsection IBM RS/6000 and PowerPC Options
-+@cindex RS/6000 and PowerPC Options
-+@cindex IBM RS/6000 and PowerPC Options
-+
-+These @samp{-m} options are defined for the IBM RS/6000 and PowerPC:
-+@table @gcctabopt
-+@item -mpower
-+@itemx -mno-power
-+@itemx -mpower2
-+@itemx -mno-power2
-+@itemx -mpowerpc
-+@itemx -mno-powerpc
-+@itemx -mpowerpc-gpopt
-+@itemx -mno-powerpc-gpopt
-+@itemx -mpowerpc-gfxopt
-+@itemx -mno-powerpc-gfxopt
-+@itemx -mpowerpc64
-+@itemx -mno-powerpc64
-+@itemx -mmfcrf
-+@itemx -mno-mfcrf
-+@itemx -mpopcntb
-+@itemx -mno-popcntb
-+@itemx -mfprnd
-+@itemx -mno-fprnd
-+@itemx -mcmpb
-+@itemx -mno-cmpb
-+@itemx -mmfpgpr
-+@itemx -mno-mfpgpr
-+@itemx -mhard-dfp
-+@itemx -mno-hard-dfp
-+@opindex mpower
-+@opindex mno-power
-+@opindex mpower2
-+@opindex mno-power2
-+@opindex mpowerpc
-+@opindex mno-powerpc
-+@opindex mpowerpc-gpopt
-+@opindex mno-powerpc-gpopt
-+@opindex mpowerpc-gfxopt
-+@opindex mno-powerpc-gfxopt
-+@opindex mpowerpc64
-+@opindex mno-powerpc64
-+@opindex mmfcrf
-+@opindex mno-mfcrf
-+@opindex mpopcntb
-+@opindex mno-popcntb
-+@opindex mfprnd
-+@opindex mno-fprnd
-+@opindex mcmpb
-+@opindex mno-cmpb
-+@opindex mmfpgpr
-+@opindex mno-mfpgpr
-+@opindex mhard-dfp
-+@opindex mno-hard-dfp
-+GCC supports two related instruction set architectures for the
-+RS/6000 and PowerPC@. The @dfn{POWER} instruction set are those
-+instructions supported by the @samp{rios} chip set used in the original
-+RS/6000 systems and the @dfn{PowerPC} instruction set is the
-+architecture of the Freescale MPC5xx, MPC6xx, MPC8xx microprocessors, and
-+the IBM 4xx, 6xx, and follow-on microprocessors.
-+
-+Neither architecture is a subset of the other. However there is a
-+large common subset of instructions supported by both. An MQ
-+register is included in processors supporting the POWER architecture.
-+
-+You use these options to specify which instructions are available on the
-+processor you are using. The default value of these options is
-+determined when configuring GCC@. Specifying the
-+@option{-mcpu=@var{cpu_type}} overrides the specification of these
-+options. We recommend you use the @option{-mcpu=@var{cpu_type}} option
-+rather than the options listed above.
-+
-+The @option{-mpower} option allows GCC to generate instructions that
-+are found only in the POWER architecture and to use the MQ register.
-+Specifying @option{-mpower2} implies @option{-power} and also allows GCC
-+to generate instructions that are present in the POWER2 architecture but
-+not the original POWER architecture.
-+
-+The @option{-mpowerpc} option allows GCC to generate instructions that
-+are found only in the 32-bit subset of the PowerPC architecture.
-+Specifying @option{-mpowerpc-gpopt} implies @option{-mpowerpc} and also allows
-+GCC to use the optional PowerPC architecture instructions in the
-+General Purpose group, including floating-point square root. Specifying
-+@option{-mpowerpc-gfxopt} implies @option{-mpowerpc} and also allows GCC to
-+use the optional PowerPC architecture instructions in the Graphics
-+group, including floating-point select.
-+
-+The @option{-mmfcrf} option allows GCC to generate the move from
-+condition register field instruction implemented on the POWER4
-+processor and other processors that support the PowerPC V2.01
-+architecture.
-+The @option{-mpopcntb} option allows GCC to generate the popcount and
-+double precision FP reciprocal estimate instruction implemented on the
-+POWER5 processor and other processors that support the PowerPC V2.02
-+architecture.
-+The @option{-mfprnd} option allows GCC to generate the FP round to
-+integer instructions implemented on the POWER5+ processor and other
-+processors that support the PowerPC V2.03 architecture.
-+The @option{-mcmpb} option allows GCC to generate the compare bytes
-+instruction implemented on the POWER6 processor and other processors
-+that support the PowerPC V2.05 architecture.
-+The @option{-mmfpgpr} option allows GCC to generate the FP move to/from
-+general purpose register instructions implemented on the POWER6X
-+processor and other processors that support the extended PowerPC V2.05
-+architecture.
-+The @option{-mhard-dfp} option allows GCC to generate the decimal floating
-+point instructions implemented on some POWER processors.
-+
-+The @option{-mpowerpc64} option allows GCC to generate the additional
-+64-bit instructions that are found in the full PowerPC64 architecture
-+and to treat GPRs as 64-bit, doubleword quantities. GCC defaults to
-+@option{-mno-powerpc64}.
-+
-+If you specify both @option{-mno-power} and @option{-mno-powerpc}, GCC
-+will use only the instructions in the common subset of both
-+architectures plus some special AIX common-mode calls, and will not use
-+the MQ register. Specifying both @option{-mpower} and @option{-mpowerpc}
-+permits GCC to use any instruction from either architecture and to
-+allow use of the MQ register; specify this for the Motorola MPC601.
-+
-+@item -mnew-mnemonics
-+@itemx -mold-mnemonics
-+@opindex mnew-mnemonics
-+@opindex mold-mnemonics
-+Select which mnemonics to use in the generated assembler code. With
-+@option{-mnew-mnemonics}, GCC uses the assembler mnemonics defined for
-+the PowerPC architecture. With @option{-mold-mnemonics} it uses the
-+assembler mnemonics defined for the POWER architecture. Instructions
-+defined in only one architecture have only one mnemonic; GCC uses that
-+mnemonic irrespective of which of these options is specified.
-+
-+GCC defaults to the mnemonics appropriate for the architecture in
-+use. Specifying @option{-mcpu=@var{cpu_type}} sometimes overrides the
-+value of these option. Unless you are building a cross-compiler, you
-+should normally not specify either @option{-mnew-mnemonics} or
-+@option{-mold-mnemonics}, but should instead accept the default.
-+
-+@item -mcpu=@var{cpu_type}
-+@opindex mcpu
-+Set architecture type, register usage, choice of mnemonics, and
-+instruction scheduling parameters for machine type @var{cpu_type}.
-+Supported values for @var{cpu_type} are @samp{401}, @samp{403},
-+@samp{405}, @samp{405fp}, @samp{440}, @samp{440fp}, @samp{464}, @samp{464fp},
-+@samp{505}, @samp{601}, @samp{602}, @samp{603}, @samp{603e}, @samp{604},
-+@samp{604e}, @samp{620}, @samp{630}, @samp{740}, @samp{7400},
-+@samp{7450}, @samp{750}, @samp{801}, @samp{821}, @samp{823},
-+@samp{860}, @samp{970}, @samp{8540}, @samp{e300c2}, @samp{e300c3},
-+@samp{e500mc}, @samp{ec603e}, @samp{G3}, @samp{G4}, @samp{G5},
-+@samp{power}, @samp{power2}, @samp{power3}, @samp{power4},
-+@samp{power5}, @samp{power5+}, @samp{power6}, @samp{power6x}, @samp{power7}
-+@samp{common}, @samp{powerpc}, @samp{powerpc64}, @samp{rios},
-+@samp{rios1}, @samp{rios2}, @samp{rsc}, and @samp{rs64}.
-+
-+@option{-mcpu=common} selects a completely generic processor. Code
-+generated under this option will run on any POWER or PowerPC processor.
-+GCC will use only the instructions in the common subset of both
-+architectures, and will not use the MQ register. GCC assumes a generic
-+processor model for scheduling purposes.
-+
-+@option{-mcpu=power}, @option{-mcpu=power2}, @option{-mcpu=powerpc}, and
-+@option{-mcpu=powerpc64} specify generic POWER, POWER2, pure 32-bit
-+PowerPC (i.e., not MPC601), and 64-bit PowerPC architecture machine
-+types, with an appropriate, generic processor model assumed for
-+scheduling purposes.
-+
-+The other options specify a specific processor. Code generated under
-+those options will run best on that processor, and may not run at all on
-+others.
-+
-+The @option{-mcpu} options automatically enable or disable the
-+following options:
-+
-+@gccoptlist{-maltivec -mfprnd -mhard-float -mmfcrf -mmultiple @gol
-+-mnew-mnemonics -mpopcntb -mpower -mpower2 -mpowerpc64 @gol
-+-mpowerpc-gpopt -mpowerpc-gfxopt -msingle-float -mdouble-float @gol
-+-msimple-fpu -mstring -mmulhw -mdlmzb -mmfpgpr}
-+
-+The particular options set for any particular CPU will vary between
-+compiler versions, depending on what setting seems to produce optimal
-+code for that CPU; it doesn't necessarily reflect the actual hardware's
-+capabilities. If you wish to set an individual option to a particular
-+value, you may specify it after the @option{-mcpu} option, like
-+@samp{-mcpu=970 -mno-altivec}.
-+
-+On AIX, the @option{-maltivec} and @option{-mpowerpc64} options are
-+not enabled or disabled by the @option{-mcpu} option at present because
-+AIX does not have full support for these options. You may still
-+enable or disable them individually if you're sure it'll work in your
-+environment.
-+
-+@item -mtune=@var{cpu_type}
-+@opindex mtune
-+Set the instruction scheduling parameters for machine type
-+@var{cpu_type}, but do not set the architecture type, register usage, or
-+choice of mnemonics, as @option{-mcpu=@var{cpu_type}} would. The same
-+values for @var{cpu_type} are used for @option{-mtune} as for
-+@option{-mcpu}. If both are specified, the code generated will use the
-+architecture, registers, and mnemonics set by @option{-mcpu}, but the
-+scheduling parameters set by @option{-mtune}.
-+
-+@item -mswdiv
-+@itemx -mno-swdiv
-+@opindex mswdiv
-+@opindex mno-swdiv
-+Generate code to compute division as reciprocal estimate and iterative
-+refinement, creating opportunities for increased throughput. This
-+feature requires: optional PowerPC Graphics instruction set for single
-+precision and FRE instruction for double precision, assuming divides
-+cannot generate user-visible traps, and the domain values not include
-+Infinities, denormals or zero denominator.
-+
-+@item -maltivec
-+@itemx -mno-altivec
-+@opindex maltivec
-+@opindex mno-altivec
-+Generate code that uses (does not use) AltiVec instructions, and also
-+enable the use of built-in functions that allow more direct access to
-+the AltiVec instruction set. You may also need to set
-+@option{-mabi=altivec} to adjust the current ABI with AltiVec ABI
-+enhancements.
-+
-+@item -mvrsave
-+@itemx -mno-vrsave
-+@opindex mvrsave
-+@opindex mno-vrsave
-+Generate VRSAVE instructions when generating AltiVec code.
-+
-+@item -mgen-cell-microcode
-+@opindex mgen-cell-microcode
-+Generate Cell microcode instructions
-+
-+@item -mwarn-cell-microcode
-+@opindex mwarn-cell-microcode
-+Warning when a Cell microcode instruction is going to emitted. An example
-+of a Cell microcode instruction is a variable shift.
-+
-+@item -msecure-plt
-+@opindex msecure-plt
-+Generate code that allows ld and ld.so to build executables and shared
-+libraries with non-exec .plt and .got sections. This is a PowerPC
-+32-bit SYSV ABI option.
-+
-+@item -mbss-plt
-+@opindex mbss-plt
-+Generate code that uses a BSS .plt section that ld.so fills in, and
-+requires .plt and .got sections that are both writable and executable.
-+This is a PowerPC 32-bit SYSV ABI option.
-+
-+@item -misel
-+@itemx -mno-isel
-+@opindex misel
-+@opindex mno-isel
-+This switch enables or disables the generation of ISEL instructions.
-+
-+@item -misel=@var{yes/no}
-+This switch has been deprecated. Use @option{-misel} and
-+@option{-mno-isel} instead.
-+
-+@item -mspe
-+@itemx -mno-spe
-+@opindex mspe
-+@opindex mno-spe
-+This switch enables or disables the generation of SPE simd
-+instructions.
-+
-+@item -mpaired
-+@itemx -mno-paired
-+@opindex mpaired
-+@opindex mno-paired
-+This switch enables or disables the generation of PAIRED simd
-+instructions.
-+
-+@item -mspe=@var{yes/no}
-+This option has been deprecated. Use @option{-mspe} and
-+@option{-mno-spe} instead.
-+
-+@item -mfloat-gprs=@var{yes/single/double/no}
-+@itemx -mfloat-gprs
-+@opindex mfloat-gprs
-+This switch enables or disables the generation of floating point
-+operations on the general purpose registers for architectures that
-+support it.
-+
-+The argument @var{yes} or @var{single} enables the use of
-+single-precision floating point operations.
-+
-+The argument @var{double} enables the use of single and
-+double-precision floating point operations.
-+
-+The argument @var{no} disables floating point operations on the
-+general purpose registers.
-+
-+This option is currently only available on the MPC854x.
-+
-+@item -m32
-+@itemx -m64
-+@opindex m32
-+@opindex m64
-+Generate code for 32-bit or 64-bit environments of Darwin and SVR4
-+targets (including GNU/Linux). The 32-bit environment sets int, long
-+and pointer to 32 bits and generates code that runs on any PowerPC
-+variant. The 64-bit environment sets int to 32 bits and long and
-+pointer to 64 bits, and generates code for PowerPC64, as for
-+@option{-mpowerpc64}.
-+
-+@item -mfull-toc
-+@itemx -mno-fp-in-toc
-+@itemx -mno-sum-in-toc
-+@itemx -mminimal-toc
-+@opindex mfull-toc
-+@opindex mno-fp-in-toc
-+@opindex mno-sum-in-toc
-+@opindex mminimal-toc
-+Modify generation of the TOC (Table Of Contents), which is created for
-+every executable file. The @option{-mfull-toc} option is selected by
-+default. In that case, GCC will allocate at least one TOC entry for
-+each unique non-automatic variable reference in your program. GCC
-+will also place floating-point constants in the TOC@. However, only
-+16,384 entries are available in the TOC@.
-+
-+If you receive a linker error message that saying you have overflowed
-+the available TOC space, you can reduce the amount of TOC space used
-+with the @option{-mno-fp-in-toc} and @option{-mno-sum-in-toc} options.
-+@option{-mno-fp-in-toc} prevents GCC from putting floating-point
-+constants in the TOC and @option{-mno-sum-in-toc} forces GCC to
-+generate code to calculate the sum of an address and a constant at
-+run-time instead of putting that sum into the TOC@. You may specify one
-+or both of these options. Each causes GCC to produce very slightly
-+slower and larger code at the expense of conserving TOC space.
-+
-+If you still run out of space in the TOC even when you specify both of
-+these options, specify @option{-mminimal-toc} instead. This option causes
-+GCC to make only one TOC entry for every file. When you specify this
-+option, GCC will produce code that is slower and larger but which
-+uses extremely little TOC space. You may wish to use this option
-+only on files that contain less frequently executed code.
-+
-+@item -maix64
-+@itemx -maix32
-+@opindex maix64
-+@opindex maix32
-+Enable 64-bit AIX ABI and calling convention: 64-bit pointers, 64-bit
-+@code{long} type, and the infrastructure needed to support them.
-+Specifying @option{-maix64} implies @option{-mpowerpc64} and
-+@option{-mpowerpc}, while @option{-maix32} disables the 64-bit ABI and
-+implies @option{-mno-powerpc64}. GCC defaults to @option{-maix32}.
-+
-+@item -mxl-compat
-+@itemx -mno-xl-compat
-+@opindex mxl-compat
-+@opindex mno-xl-compat
-+Produce code that conforms more closely to IBM XL compiler semantics
-+when using AIX-compatible ABI@. Pass floating-point arguments to
-+prototyped functions beyond the register save area (RSA) on the stack
-+in addition to argument FPRs. Do not assume that most significant
-+double in 128-bit long double value is properly rounded when comparing
-+values and converting to double. Use XL symbol names for long double
-+support routines.
-+
-+The AIX calling convention was extended but not initially documented to
-+handle an obscure K&R C case of calling a function that takes the
-+address of its arguments with fewer arguments than declared. IBM XL
-+compilers access floating point arguments which do not fit in the
-+RSA from the stack when a subroutine is compiled without
-+optimization. Because always storing floating-point arguments on the
-+stack is inefficient and rarely needed, this option is not enabled by
-+default and only is necessary when calling subroutines compiled by IBM
-+XL compilers without optimization.
-+
-+@item -mpe
-+@opindex mpe
-+Support @dfn{IBM RS/6000 SP} @dfn{Parallel Environment} (PE)@. Link an
-+application written to use message passing with special startup code to
-+enable the application to run. The system must have PE installed in the
-+standard location (@file{/usr/lpp/ppe.poe/}), or the @file{specs} file
-+must be overridden with the @option{-specs=} option to specify the
-+appropriate directory location. The Parallel Environment does not
-+support threads, so the @option{-mpe} option and the @option{-pthread}
-+option are incompatible.
-+
-+@item -malign-natural
-+@itemx -malign-power
-+@opindex malign-natural
-+@opindex malign-power
-+On AIX, 32-bit Darwin, and 64-bit PowerPC GNU/Linux, the option
-+@option{-malign-natural} overrides the ABI-defined alignment of larger
-+types, such as floating-point doubles, on their natural size-based boundary.
-+The option @option{-malign-power} instructs GCC to follow the ABI-specified
-+alignment rules. GCC defaults to the standard alignment defined in the ABI@.
-+
-+On 64-bit Darwin, natural alignment is the default, and @option{-malign-power}
-+is not supported.
-+
-+@item -msoft-float
-+@itemx -mhard-float
-+@opindex msoft-float
-+@opindex mhard-float
-+Generate code that does not use (uses) the floating-point register set.
-+Software floating point emulation is provided if you use the
-+@option{-msoft-float} option, and pass the option to GCC when linking.
-+
-+@item -msingle-float
-+@itemx -mdouble-float
-+@opindex msingle-float
-+@opindex mdouble-float
-+Generate code for single or double-precision floating point operations.
-+@option{-mdouble-float} implies @option{-msingle-float}.
-+
-+@item -msimple-fpu
-+@opindex msimple-fpu
-+Do not generate sqrt and div instructions for hardware floating point unit.
-+
-+@item -mfpu
-+@opindex mfpu
-+Specify type of floating point unit. Valid values are @var{sp_lite}
-+(equivalent to -msingle-float -msimple-fpu), @var{dp_lite} (equivalent
-+to -mdouble-float -msimple-fpu), @var{sp_full} (equivalent to -msingle-float),
-+and @var{dp_full} (equivalent to -mdouble-float).
-+
-+@item -mxilinx-fpu
-+@opindex mxilinx-fpu
-+Perform optimizations for floating point unit on Xilinx PPC 405/440.
-+
-+@item -mmultiple
-+@itemx -mno-multiple
-+@opindex mmultiple
-+@opindex mno-multiple
-+Generate code that uses (does not use) the load multiple word
-+instructions and the store multiple word instructions. These
-+instructions are generated by default on POWER systems, and not
-+generated on PowerPC systems. Do not use @option{-mmultiple} on little
-+endian PowerPC systems, since those instructions do not work when the
-+processor is in little endian mode. The exceptions are PPC740 and
-+PPC750 which permit the instructions usage in little endian mode.
-+
-+@item -mstring
-+@itemx -mno-string
-+@opindex mstring
-+@opindex mno-string
-+Generate code that uses (does not use) the load string instructions
-+and the store string word instructions to save multiple registers and
-+do small block moves. These instructions are generated by default on
-+POWER systems, and not generated on PowerPC systems. Do not use
-+@option{-mstring} on little endian PowerPC systems, since those
-+instructions do not work when the processor is in little endian mode.
-+The exceptions are PPC740 and PPC750 which permit the instructions
-+usage in little endian mode.
-+
-+@item -mupdate
-+@itemx -mno-update
-+@opindex mupdate
-+@opindex mno-update
-+Generate code that uses (does not use) the load or store instructions
-+that update the base register to the address of the calculated memory
-+location. These instructions are generated by default. If you use
-+@option{-mno-update}, there is a small window between the time that the
-+stack pointer is updated and the address of the previous frame is
-+stored, which means code that walks the stack frame across interrupts or
-+signals may get corrupted data.
-+
-+@item -mavoid-indexed-addresses
-+@item -mno-avoid-indexed-addresses
-+@opindex mavoid-indexed-addresses
-+@opindex mno-avoid-indexed-addresses
-+Generate code that tries to avoid (not avoid) the use of indexed load
-+or store instructions. These instructions can incur a performance
-+penalty on Power6 processors in certain situations, such as when
-+stepping through large arrays that cross a 16M boundary. This option
-+is enabled by default when targetting Power6 and disabled otherwise.
-+
-+@item -mfused-madd
-+@itemx -mno-fused-madd
-+@opindex mfused-madd
-+@opindex mno-fused-madd
-+Generate code that uses (does not use) the floating point multiply and
-+accumulate instructions. These instructions are generated by default if
-+hardware floating is used.
-+
-+@item -mmulhw
-+@itemx -mno-mulhw
-+@opindex mmulhw
-+@opindex mno-mulhw
-+Generate code that uses (does not use) the half-word multiply and
-+multiply-accumulate instructions on the IBM 405, 440 and 464 processors.
-+These instructions are generated by default when targetting those
-+processors.
-+
-+@item -mdlmzb
-+@itemx -mno-dlmzb
-+@opindex mdlmzb
-+@opindex mno-dlmzb
-+Generate code that uses (does not use) the string-search @samp{dlmzb}
-+instruction on the IBM 405, 440 and 464 processors. This instruction is
-+generated by default when targetting those processors.
-+
-+@item -mno-bit-align
-+@itemx -mbit-align
-+@opindex mno-bit-align
-+@opindex mbit-align
-+On System V.4 and embedded PowerPC systems do not (do) force structures
-+and unions that contain bit-fields to be aligned to the base type of the
-+bit-field.
-+
-+For example, by default a structure containing nothing but 8
-+@code{unsigned} bit-fields of length 1 would be aligned to a 4 byte
-+boundary and have a size of 4 bytes. By using @option{-mno-bit-align},
-+the structure would be aligned to a 1 byte boundary and be one byte in
-+size.
-+
-+@item -mno-strict-align
-+@itemx -mstrict-align
-+@opindex mno-strict-align
-+@opindex mstrict-align
-+On System V.4 and embedded PowerPC systems do not (do) assume that
-+unaligned memory references will be handled by the system.
-+
-+@item -mrelocatable
-+@itemx -mno-relocatable
-+@opindex mrelocatable
-+@opindex mno-relocatable
-+On embedded PowerPC systems generate code that allows (does not allow)
-+the program to be relocated to a different address at runtime. If you
-+use @option{-mrelocatable} on any module, all objects linked together must
-+be compiled with @option{-mrelocatable} or @option{-mrelocatable-lib}.
-+
-+@item -mrelocatable-lib
-+@itemx -mno-relocatable-lib
-+@opindex mrelocatable-lib
-+@opindex mno-relocatable-lib
-+On embedded PowerPC systems generate code that allows (does not allow)
-+the program to be relocated to a different address at runtime. Modules
-+compiled with @option{-mrelocatable-lib} can be linked with either modules
-+compiled without @option{-mrelocatable} and @option{-mrelocatable-lib} or
-+with modules compiled with the @option{-mrelocatable} options.
-+
-+@item -mno-toc
-+@itemx -mtoc
-+@opindex mno-toc
-+@opindex mtoc
-+On System V.4 and embedded PowerPC systems do not (do) assume that
-+register 2 contains a pointer to a global area pointing to the addresses
-+used in the program.
-+
-+@item -mlittle
-+@itemx -mlittle-endian
-+@opindex mlittle
-+@opindex mlittle-endian
-+On System V.4 and embedded PowerPC systems compile code for the
-+processor in little endian mode. The @option{-mlittle-endian} option is
-+the same as @option{-mlittle}.
-+
-+@item -mbig
-+@itemx -mbig-endian
-+@opindex mbig
-+@opindex mbig-endian
-+On System V.4 and embedded PowerPC systems compile code for the
-+processor in big endian mode. The @option{-mbig-endian} option is
-+the same as @option{-mbig}.
-+
-+@item -mdynamic-no-pic
-+@opindex mdynamic-no-pic
-+On Darwin and Mac OS X systems, compile code so that it is not
-+relocatable, but that its external references are relocatable. The
-+resulting code is suitable for applications, but not shared
-+libraries.
-+
-+@item -mprioritize-restricted-insns=@var{priority}
-+@opindex mprioritize-restricted-insns
-+This option controls the priority that is assigned to
-+dispatch-slot restricted instructions during the second scheduling
-+pass. The argument @var{priority} takes the value @var{0/1/2} to assign
-+@var{no/highest/second-highest} priority to dispatch slot restricted
-+instructions.
-+
-+@item -msched-costly-dep=@var{dependence_type}
-+@opindex msched-costly-dep
-+This option controls which dependences are considered costly
-+by the target during instruction scheduling. The argument
-+@var{dependence_type} takes one of the following values:
-+@var{no}: no dependence is costly,
-+@var{all}: all dependences are costly,
-+@var{true_store_to_load}: a true dependence from store to load is costly,
-+@var{store_to_load}: any dependence from store to load is costly,
-+@var{number}: any dependence which latency >= @var{number} is costly.
-+
-+@item -minsert-sched-nops=@var{scheme}
-+@opindex minsert-sched-nops
-+This option controls which nop insertion scheme will be used during
-+the second scheduling pass. The argument @var{scheme} takes one of the
-+following values:
-+@var{no}: Don't insert nops.
-+@var{pad}: Pad with nops any dispatch group which has vacant issue slots,
-+according to the scheduler's grouping.
-+@var{regroup_exact}: Insert nops to force costly dependent insns into
-+separate groups. Insert exactly as many nops as needed to force an insn
-+to a new group, according to the estimated processor grouping.
-+@var{number}: Insert nops to force costly dependent insns into
-+separate groups. Insert @var{number} nops to force an insn to a new group.
-+
-+@item -mcall-sysv
-+@opindex mcall-sysv
-+On System V.4 and embedded PowerPC systems compile code using calling
-+conventions that adheres to the March 1995 draft of the System V
-+Application Binary Interface, PowerPC processor supplement. This is the
-+default unless you configured GCC using @samp{powerpc-*-eabiaix}.
-+
-+@item -mcall-sysv-eabi
-+@opindex mcall-sysv-eabi
-+Specify both @option{-mcall-sysv} and @option{-meabi} options.
-+
-+@item -mcall-sysv-noeabi
-+@opindex mcall-sysv-noeabi
-+Specify both @option{-mcall-sysv} and @option{-mno-eabi} options.
-+
-+@item -mcall-solaris
-+@opindex mcall-solaris
-+On System V.4 and embedded PowerPC systems compile code for the Solaris
-+operating system.
-+
-+@item -mcall-linux
-+@opindex mcall-linux
-+On System V.4 and embedded PowerPC systems compile code for the
-+Linux-based GNU system.
-+
-+@item -mcall-gnu
-+@opindex mcall-gnu
-+On System V.4 and embedded PowerPC systems compile code for the
-+Hurd-based GNU system.
-+
-+@item -mcall-netbsd
-+@opindex mcall-netbsd
-+On System V.4 and embedded PowerPC systems compile code for the
-+NetBSD operating system.
-+
-+@item -maix-struct-return
-+@opindex maix-struct-return
-+Return all structures in memory (as specified by the AIX ABI)@.
-+
-+@item -msvr4-struct-return
-+@opindex msvr4-struct-return
-+Return structures smaller than 8 bytes in registers (as specified by the
-+SVR4 ABI)@.
-+
-+@item -mabi=@var{abi-type}
-+@opindex mabi
-+Extend the current ABI with a particular extension, or remove such extension.
-+Valid values are @var{altivec}, @var{no-altivec}, @var{spe},
-+@var{no-spe}, @var{ibmlongdouble}, @var{ieeelongdouble}@.
-+
-+@item -mabi=spe
-+@opindex mabi=spe
-+Extend the current ABI with SPE ABI extensions. This does not change
-+the default ABI, instead it adds the SPE ABI extensions to the current
-+ABI@.
-+
-+@item -mabi=no-spe
-+@opindex mabi=no-spe
-+Disable Booke SPE ABI extensions for the current ABI@.
-+
-+@item -mabi=ibmlongdouble
-+@opindex mabi=ibmlongdouble
-+Change the current ABI to use IBM extended precision long double.
-+This is a PowerPC 32-bit SYSV ABI option.
-+
-+@item -mabi=ieeelongdouble
-+@opindex mabi=ieeelongdouble
-+Change the current ABI to use IEEE extended precision long double.
-+This is a PowerPC 32-bit Linux ABI option.
-+
-+@item -mprototype
-+@itemx -mno-prototype
-+@opindex mprototype
-+@opindex mno-prototype
-+On System V.4 and embedded PowerPC systems assume that all calls to
-+variable argument functions are properly prototyped. Otherwise, the
-+compiler must insert an instruction before every non prototyped call to
-+set or clear bit 6 of the condition code register (@var{CR}) to
-+indicate whether floating point values were passed in the floating point
-+registers in case the function takes a variable arguments. With
-+@option{-mprototype}, only calls to prototyped variable argument functions
-+will set or clear the bit.
-+
-+@item -msim
-+@opindex msim
-+On embedded PowerPC systems, assume that the startup module is called
-+@file{sim-crt0.o} and that the standard C libraries are @file{libsim.a} and
-+@file{libc.a}. This is the default for @samp{powerpc-*-eabisim}
-+configurations.
-+
-+@item -mmvme
-+@opindex mmvme
-+On embedded PowerPC systems, assume that the startup module is called
-+@file{crt0.o} and the standard C libraries are @file{libmvme.a} and
-+@file{libc.a}.
-+
-+@item -mads
-+@opindex mads
-+On embedded PowerPC systems, assume that the startup module is called
-+@file{crt0.o} and the standard C libraries are @file{libads.a} and
-+@file{libc.a}.
-+
-+@item -myellowknife
-+@opindex myellowknife
-+On embedded PowerPC systems, assume that the startup module is called
-+@file{crt0.o} and the standard C libraries are @file{libyk.a} and
-+@file{libc.a}.
-+
-+@item -mvxworks
-+@opindex mvxworks
-+On System V.4 and embedded PowerPC systems, specify that you are
-+compiling for a VxWorks system.
-+
-+@item -memb
-+@opindex memb
-+On embedded PowerPC systems, set the @var{PPC_EMB} bit in the ELF flags
-+header to indicate that @samp{eabi} extended relocations are used.
-+
-+@item -meabi
-+@itemx -mno-eabi
-+@opindex meabi
-+@opindex mno-eabi
-+On System V.4 and embedded PowerPC systems do (do not) adhere to the
-+Embedded Applications Binary Interface (eabi) which is a set of
-+modifications to the System V.4 specifications. Selecting @option{-meabi}
-+means that the stack is aligned to an 8 byte boundary, a function
-+@code{__eabi} is called to from @code{main} to set up the eabi
-+environment, and the @option{-msdata} option can use both @code{r2} and
-+@code{r13} to point to two separate small data areas. Selecting
-+@option{-mno-eabi} means that the stack is aligned to a 16 byte boundary,
-+do not call an initialization function from @code{main}, and the
-+@option{-msdata} option will only use @code{r13} to point to a single
-+small data area. The @option{-meabi} option is on by default if you
-+configured GCC using one of the @samp{powerpc*-*-eabi*} options.
-+
-+@item -msdata=eabi
-+@opindex msdata=eabi
-+On System V.4 and embedded PowerPC systems, put small initialized
-+@code{const} global and static data in the @samp{.sdata2} section, which
-+is pointed to by register @code{r2}. Put small initialized
-+non-@code{const} global and static data in the @samp{.sdata} section,
-+which is pointed to by register @code{r13}. Put small uninitialized
-+global and static data in the @samp{.sbss} section, which is adjacent to
-+the @samp{.sdata} section. The @option{-msdata=eabi} option is
-+incompatible with the @option{-mrelocatable} option. The
-+@option{-msdata=eabi} option also sets the @option{-memb} option.
-+
-+@item -msdata=sysv
-+@opindex msdata=sysv
-+On System V.4 and embedded PowerPC systems, put small global and static
-+data in the @samp{.sdata} section, which is pointed to by register
-+@code{r13}. Put small uninitialized global and static data in the
-+@samp{.sbss} section, which is adjacent to the @samp{.sdata} section.
-+The @option{-msdata=sysv} option is incompatible with the
-+@option{-mrelocatable} option.
-+
-+@item -msdata=default
-+@itemx -msdata
-+@opindex msdata=default
-+@opindex msdata
-+On System V.4 and embedded PowerPC systems, if @option{-meabi} is used,
-+compile code the same as @option{-msdata=eabi}, otherwise compile code the
-+same as @option{-msdata=sysv}.
-+
-+@item -msdata=data
-+@opindex msdata=data
-+On System V.4 and embedded PowerPC systems, put small global
-+data in the @samp{.sdata} section. Put small uninitialized global
-+data in the @samp{.sbss} section. Do not use register @code{r13}
-+to address small data however. This is the default behavior unless
-+other @option{-msdata} options are used.
-+
-+@item -msdata=none
-+@itemx -mno-sdata
-+@opindex msdata=none
-+@opindex mno-sdata
-+On embedded PowerPC systems, put all initialized global and static data
-+in the @samp{.data} section, and all uninitialized data in the
-+@samp{.bss} section.
-+
-+@item -G @var{num}
-+@opindex G
-+@cindex smaller data references (PowerPC)
-+@cindex .sdata/.sdata2 references (PowerPC)
-+On embedded PowerPC systems, put global and static items less than or
-+equal to @var{num} bytes into the small data or bss sections instead of
-+the normal data or bss section. By default, @var{num} is 8. The
-+@option{-G @var{num}} switch is also passed to the linker.
-+All modules should be compiled with the same @option{-G @var{num}} value.
-+
-+@item -mregnames
-+@itemx -mno-regnames
-+@opindex mregnames
-+@opindex mno-regnames
-+On System V.4 and embedded PowerPC systems do (do not) emit register
-+names in the assembly language output using symbolic forms.
-+
-+@item -mlongcall
-+@itemx -mno-longcall
-+@opindex mlongcall
-+@opindex mno-longcall
-+By default assume that all calls are far away so that a longer more
-+expensive calling sequence is required. This is required for calls
-+further than 32 megabytes (33,554,432 bytes) from the current location.
-+A short call will be generated if the compiler knows
-+the call cannot be that far away. This setting can be overridden by
-+the @code{shortcall} function attribute, or by @code{#pragma
-+longcall(0)}.
-+
-+Some linkers are capable of detecting out-of-range calls and generating
-+glue code on the fly. On these systems, long calls are unnecessary and
-+generate slower code. As of this writing, the AIX linker can do this,
-+as can the GNU linker for PowerPC/64. It is planned to add this feature
-+to the GNU linker for 32-bit PowerPC systems as well.
-+
-+On Darwin/PPC systems, @code{#pragma longcall} will generate ``jbsr
-+callee, L42'', plus a ``branch island'' (glue code). The two target
-+addresses represent the callee and the ``branch island''. The
-+Darwin/PPC linker will prefer the first address and generate a ``bl
-+callee'' if the PPC ``bl'' instruction will reach the callee directly;
-+otherwise, the linker will generate ``bl L42'' to call the ``branch
-+island''. The ``branch island'' is appended to the body of the
-+calling function; it computes the full 32-bit address of the callee
-+and jumps to it.
-+
-+On Mach-O (Darwin) systems, this option directs the compiler emit to
-+the glue for every direct call, and the Darwin linker decides whether
-+to use or discard it.
-+
-+In the future, we may cause GCC to ignore all longcall specifications
-+when the linker is known to generate glue.
-+
-+@item -pthread
-+@opindex pthread
-+Adds support for multithreading with the @dfn{pthreads} library.
-+This option sets flags for both the preprocessor and linker.
-+
-+@end table
-+
-+@node S/390 and zSeries Options
-+@subsection S/390 and zSeries Options
-+@cindex S/390 and zSeries Options
-+
-+These are the @samp{-m} options defined for the S/390 and zSeries architecture.
-+
-+@table @gcctabopt
-+@item -mhard-float
-+@itemx -msoft-float
-+@opindex mhard-float
-+@opindex msoft-float
-+Use (do not use) the hardware floating-point instructions and registers
-+for floating-point operations. When @option{-msoft-float} is specified,
-+functions in @file{libgcc.a} will be used to perform floating-point
-+operations. When @option{-mhard-float} is specified, the compiler
-+generates IEEE floating-point instructions. This is the default.
-+
-+@item -mhard-dfp
-+@itemx -mno-hard-dfp
-+@opindex mhard-dfp
-+@opindex mno-hard-dfp
-+Use (do not use) the hardware decimal-floating-point instructions for
-+decimal-floating-point operations. When @option{-mno-hard-dfp} is
-+specified, functions in @file{libgcc.a} will be used to perform
-+decimal-floating-point operations. When @option{-mhard-dfp} is
-+specified, the compiler generates decimal-floating-point hardware
-+instructions. This is the default for @option{-march=z9-ec} or higher.
-+
-+@item -mlong-double-64
-+@itemx -mlong-double-128
-+@opindex mlong-double-64
-+@opindex mlong-double-128
-+These switches control the size of @code{long double} type. A size
-+of 64bit makes the @code{long double} type equivalent to the @code{double}
-+type. This is the default.
-+
-+@item -mbackchain
-+@itemx -mno-backchain
-+@opindex mbackchain
-+@opindex mno-backchain
-+Store (do not store) the address of the caller's frame as backchain pointer
-+into the callee's stack frame.
-+A backchain may be needed to allow debugging using tools that do not understand
-+DWARF-2 call frame information.
-+When @option{-mno-packed-stack} is in effect, the backchain pointer is stored
-+at the bottom of the stack frame; when @option{-mpacked-stack} is in effect,
-+the backchain is placed into the topmost word of the 96/160 byte register
-+save area.
-+
-+In general, code compiled with @option{-mbackchain} is call-compatible with
-+code compiled with @option{-mmo-backchain}; however, use of the backchain
-+for debugging purposes usually requires that the whole binary is built with
-+@option{-mbackchain}. Note that the combination of @option{-mbackchain},
-+@option{-mpacked-stack} and @option{-mhard-float} is not supported. In order
-+to build a linux kernel use @option{-msoft-float}.
-+
-+The default is to not maintain the backchain.
-+
-+@item -mpacked-stack
-+@itemx -mno-packed-stack
-+@opindex mpacked-stack
-+@opindex mno-packed-stack
-+Use (do not use) the packed stack layout. When @option{-mno-packed-stack} is
-+specified, the compiler uses the all fields of the 96/160 byte register save
-+area only for their default purpose; unused fields still take up stack space.
-+When @option{-mpacked-stack} is specified, register save slots are densely
-+packed at the top of the register save area; unused space is reused for other
-+purposes, allowing for more efficient use of the available stack space.
-+However, when @option{-mbackchain} is also in effect, the topmost word of
-+the save area is always used to store the backchain, and the return address
-+register is always saved two words below the backchain.
-+
-+As long as the stack frame backchain is not used, code generated with
-+@option{-mpacked-stack} is call-compatible with code generated with
-+@option{-mno-packed-stack}. Note that some non-FSF releases of GCC 2.95 for
-+S/390 or zSeries generated code that uses the stack frame backchain at run
-+time, not just for debugging purposes. Such code is not call-compatible
-+with code compiled with @option{-mpacked-stack}. Also, note that the
-+combination of @option{-mbackchain},
-+@option{-mpacked-stack} and @option{-mhard-float} is not supported. In order
-+to build a linux kernel use @option{-msoft-float}.
-+
-+The default is to not use the packed stack layout.
-+
-+@item -msmall-exec
-+@itemx -mno-small-exec
-+@opindex msmall-exec
-+@opindex mno-small-exec
-+Generate (or do not generate) code using the @code{bras} instruction
-+to do subroutine calls.
-+This only works reliably if the total executable size does not
-+exceed 64k. The default is to use the @code{basr} instruction instead,
-+which does not have this limitation.
-+
-+@item -m64
-+@itemx -m31
-+@opindex m64
-+@opindex m31
-+When @option{-m31} is specified, generate code compliant to the
-+GNU/Linux for S/390 ABI@. When @option{-m64} is specified, generate
-+code compliant to the GNU/Linux for zSeries ABI@. This allows GCC in
-+particular to generate 64-bit instructions. For the @samp{s390}
-+targets, the default is @option{-m31}, while the @samp{s390x}
-+targets default to @option{-m64}.
-+
-+@item -mzarch
-+@itemx -mesa
-+@opindex mzarch
-+@opindex mesa
-+When @option{-mzarch} is specified, generate code using the
-+instructions available on z/Architecture.
-+When @option{-mesa} is specified, generate code using the
-+instructions available on ESA/390. Note that @option{-mesa} is
-+not possible with @option{-m64}.
-+When generating code compliant to the GNU/Linux for S/390 ABI,
-+the default is @option{-mesa}. When generating code compliant
-+to the GNU/Linux for zSeries ABI, the default is @option{-mzarch}.
-+
-+@item -mmvcle
-+@itemx -mno-mvcle
-+@opindex mmvcle
-+@opindex mno-mvcle
-+Generate (or do not generate) code using the @code{mvcle} instruction
-+to perform block moves. When @option{-mno-mvcle} is specified,
-+use a @code{mvc} loop instead. This is the default unless optimizing for
-+size.
-+
-+@item -mdebug
-+@itemx -mno-debug
-+@opindex mdebug
-+@opindex mno-debug
-+Print (or do not print) additional debug information when compiling.
-+The default is to not print debug information.
-+
-+@item -march=@var{cpu-type}
-+@opindex march
-+Generate code that will run on @var{cpu-type}, which is the name of a system
-+representing a certain processor type. Possible values for
-+@var{cpu-type} are @samp{g5}, @samp{g6}, @samp{z900}, @samp{z990},
-+@samp{z9-109}, @samp{z9-ec} and @samp{z10}.
-+When generating code using the instructions available on z/Architecture,
-+the default is @option{-march=z900}. Otherwise, the default is
-+@option{-march=g5}.
-+
-+@item -mtune=@var{cpu-type}
-+@opindex mtune
-+Tune to @var{cpu-type} everything applicable about the generated code,
-+except for the ABI and the set of available instructions.
-+The list of @var{cpu-type} values is the same as for @option{-march}.
-+The default is the value used for @option{-march}.
-+
-+@item -mtpf-trace
-+@itemx -mno-tpf-trace
-+@opindex mtpf-trace
-+@opindex mno-tpf-trace
-+Generate code that adds (does not add) in TPF OS specific branches to trace
-+routines in the operating system. This option is off by default, even
-+when compiling for the TPF OS@.
-+
-+@item -mfused-madd
-+@itemx -mno-fused-madd
-+@opindex mfused-madd
-+@opindex mno-fused-madd
-+Generate code that uses (does not use) the floating point multiply and
-+accumulate instructions. These instructions are generated by default if
-+hardware floating point is used.
-+
-+@item -mwarn-framesize=@var{framesize}
-+@opindex mwarn-framesize
-+Emit a warning if the current function exceeds the given frame size. Because
-+this is a compile time check it doesn't need to be a real problem when the program
-+runs. It is intended to identify functions which most probably cause
-+a stack overflow. It is useful to be used in an environment with limited stack
-+size e.g.@: the linux kernel.
-+
-+@item -mwarn-dynamicstack
-+@opindex mwarn-dynamicstack
-+Emit a warning if the function calls alloca or uses dynamically
-+sized arrays. This is generally a bad idea with a limited stack size.
-+
-+@item -mstack-guard=@var{stack-guard}
-+@itemx -mstack-size=@var{stack-size}
-+@opindex mstack-guard
-+@opindex mstack-size
-+If these options are provided the s390 back end emits additional instructions in
-+the function prologue which trigger a trap if the stack size is @var{stack-guard}
-+bytes above the @var{stack-size} (remember that the stack on s390 grows downward).
-+If the @var{stack-guard} option is omitted the smallest power of 2 larger than
-+the frame size of the compiled function is chosen.
-+These options are intended to be used to help debugging stack overflow problems.
-+The additionally emitted code causes only little overhead and hence can also be
-+used in production like systems without greater performance degradation. The given
-+values have to be exact powers of 2 and @var{stack-size} has to be greater than
-+@var{stack-guard} without exceeding 64k.
-+In order to be efficient the extra code makes the assumption that the stack starts
-+at an address aligned to the value given by @var{stack-size}.
-+The @var{stack-guard} option can only be used in conjunction with @var{stack-size}.
-+@end table
-+
-+@node Score Options
-+@subsection Score Options
-+@cindex Score Options
-+
-+These options are defined for Score implementations:
-+
-+@table @gcctabopt
-+@item -meb
-+@opindex meb
-+Compile code for big endian mode. This is the default.
-+
-+@item -mel
-+@opindex mel
-+Compile code for little endian mode.
-+
-+@item -mnhwloop
-+@opindex mnhwloop
-+Disable generate bcnz instruction.
-+
-+@item -muls
-+@opindex muls
-+Enable generate unaligned load and store instruction.
-+
-+@item -mmac
-+@opindex mmac
-+Enable the use of multiply-accumulate instructions. Disabled by default.
-+
-+@item -mscore5
-+@opindex mscore5
-+Specify the SCORE5 as the target architecture.
-+
-+@item -mscore5u
-+@opindex mscore5u
-+Specify the SCORE5U of the target architecture.
-+
-+@item -mscore7
-+@opindex mscore7
-+Specify the SCORE7 as the target architecture. This is the default.
-+
-+@item -mscore7d
-+@opindex mscore7d
-+Specify the SCORE7D as the target architecture.
-+@end table
-+
-+@node SH Options
-+@subsection SH Options
-+
-+These @samp{-m} options are defined for the SH implementations:
-+
-+@table @gcctabopt
-+@item -m1
-+@opindex m1
-+Generate code for the SH1.
-+
-+@item -m2
-+@opindex m2
-+Generate code for the SH2.
-+
-+@item -m2e
-+Generate code for the SH2e.
-+
-+@item -m3
-+@opindex m3
-+Generate code for the SH3.
-+
-+@item -m3e
-+@opindex m3e
-+Generate code for the SH3e.
-+
-+@item -m4-nofpu
-+@opindex m4-nofpu
-+Generate code for the SH4 without a floating-point unit.
-+
-+@item -m4-single-only
-+@opindex m4-single-only
-+Generate code for the SH4 with a floating-point unit that only
-+supports single-precision arithmetic.
-+
-+@item -m4-single
-+@opindex m4-single
-+Generate code for the SH4 assuming the floating-point unit is in
-+single-precision mode by default.
-+
-+@item -m4
-+@opindex m4
-+Generate code for the SH4.
-+
-+@item -m4a-nofpu
-+@opindex m4a-nofpu
-+Generate code for the SH4al-dsp, or for a SH4a in such a way that the
-+floating-point unit is not used.
-+
-+@item -m4a-single-only
-+@opindex m4a-single-only
-+Generate code for the SH4a, in such a way that no double-precision
-+floating point operations are used.
-+
-+@item -m4a-single
-+@opindex m4a-single
-+Generate code for the SH4a assuming the floating-point unit is in
-+single-precision mode by default.
-+
-+@item -m4a
-+@opindex m4a
-+Generate code for the SH4a.
-+
-+@item -m4al
-+@opindex m4al
-+Same as @option{-m4a-nofpu}, except that it implicitly passes
-+@option{-dsp} to the assembler. GCC doesn't generate any DSP
-+instructions at the moment.
-+
-+@item -mb
-+@opindex mb
-+Compile code for the processor in big endian mode.
-+
-+@item -ml
-+@opindex ml
-+Compile code for the processor in little endian mode.
-+
-+@item -mdalign
-+@opindex mdalign
-+Align doubles at 64-bit boundaries. Note that this changes the calling
-+conventions, and thus some functions from the standard C library will
-+not work unless you recompile it first with @option{-mdalign}.
-+
-+@item -mrelax
-+@opindex mrelax
-+Shorten some address references at link time, when possible; uses the
-+linker option @option{-relax}.
-+
-+@item -mbigtable
-+@opindex mbigtable
-+Use 32-bit offsets in @code{switch} tables. The default is to use
-+16-bit offsets.
-+
-+@item -mbitops
-+@opindex mbitops
-+Enable the use of bit manipulation instructions on SH2A.
-+
-+@item -mfmovd
-+@opindex mfmovd
-+Enable the use of the instruction @code{fmovd}.
-+
-+@item -mhitachi
-+@opindex mhitachi
-+Comply with the calling conventions defined by Renesas.
-+
-+@item -mrenesas
-+@opindex mhitachi
-+Comply with the calling conventions defined by Renesas.
-+
-+@item -mno-renesas
-+@opindex mhitachi
-+Comply with the calling conventions defined for GCC before the Renesas
-+conventions were available. This option is the default for all
-+targets of the SH toolchain except for @samp{sh-symbianelf}.
-+
-+@item -mnomacsave
-+@opindex mnomacsave
-+Mark the @code{MAC} register as call-clobbered, even if
-+@option{-mhitachi} is given.
-+
-+@item -mieee
-+@opindex mieee
-+Increase IEEE-compliance of floating-point code.
-+At the moment, this is equivalent to @option{-fno-finite-math-only}.
-+When generating 16 bit SH opcodes, getting IEEE-conforming results for
-+comparisons of NANs / infinities incurs extra overhead in every
-+floating point comparison, therefore the default is set to
-+@option{-ffinite-math-only}.
-+
-+@item -minline-ic_invalidate
-+@opindex minline-ic_invalidate
-+Inline code to invalidate instruction cache entries after setting up
-+nested function trampolines.
-+This option has no effect if -musermode is in effect and the selected
-+code generation option (e.g. -m4) does not allow the use of the icbi
-+instruction.
-+If the selected code generation option does not allow the use of the icbi
-+instruction, and -musermode is not in effect, the inlined code will
-+manipulate the instruction cache address array directly with an associative
-+write. This not only requires privileged mode, but it will also
-+fail if the cache line had been mapped via the TLB and has become unmapped.
-+
-+@item -misize
-+@opindex misize
-+Dump instruction size and location in the assembly code.
-+
-+@item -mpadstruct
-+@opindex mpadstruct
-+This option is deprecated. It pads structures to multiple of 4 bytes,
-+which is incompatible with the SH ABI@.
-+
-+@item -mspace
-+@opindex mspace
-+Optimize for space instead of speed. Implied by @option{-Os}.
-+
-+@item -mprefergot
-+@opindex mprefergot
-+When generating position-independent code, emit function calls using
-+the Global Offset Table instead of the Procedure Linkage Table.
-+
-+@item -musermode
-+@opindex musermode
-+Don't generate privileged mode only code; implies -mno-inline-ic_invalidate
-+if the inlined code would not work in user mode.
-+This is the default when the target is @code{sh-*-linux*}.
-+
-+@item -multcost=@var{number}
-+@opindex multcost=@var{number}
-+Set the cost to assume for a multiply insn.
-+
-+@item -mdiv=@var{strategy}
-+@opindex mdiv=@var{strategy}
-+Set the division strategy to use for SHmedia code. @var{strategy} must be
-+one of: call, call2, fp, inv, inv:minlat, inv20u, inv20l, inv:call,
-+inv:call2, inv:fp .
-+"fp" performs the operation in floating point. This has a very high latency,
-+but needs only a few instructions, so it might be a good choice if
-+your code has enough easily exploitable ILP to allow the compiler to
-+schedule the floating point instructions together with other instructions.
-+Division by zero causes a floating point exception.
-+"inv" uses integer operations to calculate the inverse of the divisor,
-+and then multiplies the dividend with the inverse. This strategy allows
-+cse and hoisting of the inverse calculation. Division by zero calculates
-+an unspecified result, but does not trap.
-+"inv:minlat" is a variant of "inv" where if no cse / hoisting opportunities
-+have been found, or if the entire operation has been hoisted to the same
-+place, the last stages of the inverse calculation are intertwined with the
-+final multiply to reduce the overall latency, at the expense of using a few
-+more instructions, and thus offering fewer scheduling opportunities with
-+other code.
-+"call" calls a library function that usually implements the inv:minlat
-+strategy.
-+This gives high code density for m5-*media-nofpu compilations.
-+"call2" uses a different entry point of the same library function, where it
-+assumes that a pointer to a lookup table has already been set up, which
-+exposes the pointer load to cse / code hoisting optimizations.
-+"inv:call", "inv:call2" and "inv:fp" all use the "inv" algorithm for initial
-+code generation, but if the code stays unoptimized, revert to the "call",
-+"call2", or "fp" strategies, respectively. Note that the
-+potentially-trapping side effect of division by zero is carried by a
-+separate instruction, so it is possible that all the integer instructions
-+are hoisted out, but the marker for the side effect stays where it is.
-+A recombination to fp operations or a call is not possible in that case.
-+"inv20u" and "inv20l" are variants of the "inv:minlat" strategy. In the case
-+that the inverse calculation was nor separated from the multiply, they speed
-+up division where the dividend fits into 20 bits (plus sign where applicable),
-+by inserting a test to skip a number of operations in this case; this test
-+slows down the case of larger dividends. inv20u assumes the case of a such
-+a small dividend to be unlikely, and inv20l assumes it to be likely.
-+
-+@item -mdivsi3_libfunc=@var{name}
-+@opindex mdivsi3_libfunc=@var{name}
-+Set the name of the library function used for 32 bit signed division to
-+@var{name}. This only affect the name used in the call and inv:call
-+division strategies, and the compiler will still expect the same
-+sets of input/output/clobbered registers as if this option was not present.
-+
-+@item -mfixed-range=@var{register-range}
-+@opindex mfixed-range
-+Generate code treating the given register range as fixed registers.
-+A fixed register is one that the register allocator can not use. This is
-+useful when compiling kernel code. A register range is specified as
-+two registers separated by a dash. Multiple register ranges can be
-+specified separated by a comma.
-+
-+@item -madjust-unroll
-+@opindex madjust-unroll
-+Throttle unrolling to avoid thrashing target registers.
-+This option only has an effect if the gcc code base supports the
-+TARGET_ADJUST_UNROLL_MAX target hook.
-+
-+@item -mindexed-addressing
-+@opindex mindexed-addressing
-+Enable the use of the indexed addressing mode for SHmedia32/SHcompact.
-+This is only safe if the hardware and/or OS implement 32 bit wrap-around
-+semantics for the indexed addressing mode. The architecture allows the
-+implementation of processors with 64 bit MMU, which the OS could use to
-+get 32 bit addressing, but since no current hardware implementation supports
-+this or any other way to make the indexed addressing mode safe to use in
-+the 32 bit ABI, the default is -mno-indexed-addressing.
-+
-+@item -mgettrcost=@var{number}
-+@opindex mgettrcost=@var{number}
-+Set the cost assumed for the gettr instruction to @var{number}.
-+The default is 2 if @option{-mpt-fixed} is in effect, 100 otherwise.
-+
-+@item -mpt-fixed
-+@opindex mpt-fixed
-+Assume pt* instructions won't trap. This will generally generate better
-+scheduled code, but is unsafe on current hardware. The current architecture
-+definition says that ptabs and ptrel trap when the target anded with 3 is 3.
-+This has the unintentional effect of making it unsafe to schedule ptabs /
-+ptrel before a branch, or hoist it out of a loop. For example,
-+__do_global_ctors, a part of libgcc that runs constructors at program
-+startup, calls functions in a list which is delimited by @minus{}1. With the
-+-mpt-fixed option, the ptabs will be done before testing against @minus{}1.
-+That means that all the constructors will be run a bit quicker, but when
-+the loop comes to the end of the list, the program crashes because ptabs
-+loads @minus{}1 into a target register. Since this option is unsafe for any
-+hardware implementing the current architecture specification, the default
-+is -mno-pt-fixed. Unless the user specifies a specific cost with
-+@option{-mgettrcost}, -mno-pt-fixed also implies @option{-mgettrcost=100};
-+this deters register allocation using target registers for storing
-+ordinary integers.
-+
-+@item -minvalid-symbols
-+@opindex minvalid-symbols
-+Assume symbols might be invalid. Ordinary function symbols generated by
-+the compiler will always be valid to load with movi/shori/ptabs or
-+movi/shori/ptrel, but with assembler and/or linker tricks it is possible
-+to generate symbols that will cause ptabs / ptrel to trap.
-+This option is only meaningful when @option{-mno-pt-fixed} is in effect.
-+It will then prevent cross-basic-block cse, hoisting and most scheduling
-+of symbol loads. The default is @option{-mno-invalid-symbols}.
-+@end table
-+
-+@node SPARC Options
-+@subsection SPARC Options
-+@cindex SPARC options
-+
-+These @samp{-m} options are supported on the SPARC:
-+
-+@table @gcctabopt
-+@item -mno-app-regs
-+@itemx -mapp-regs
-+@opindex mno-app-regs
-+@opindex mapp-regs
-+Specify @option{-mapp-regs} to generate output using the global registers
-+2 through 4, which the SPARC SVR4 ABI reserves for applications. This
-+is the default.
-+
-+To be fully SVR4 ABI compliant at the cost of some performance loss,
-+specify @option{-mno-app-regs}. You should compile libraries and system
-+software with this option.
-+
-+@item -mfpu
-+@itemx -mhard-float
-+@opindex mfpu
-+@opindex mhard-float
-+Generate output containing floating point instructions. This is the
-+default.
-+
-+@item -mno-fpu
-+@itemx -msoft-float
-+@opindex mno-fpu
-+@opindex msoft-float
-+Generate output containing library calls for floating point.
-+@strong{Warning:} the requisite libraries are not available for all SPARC
-+targets. Normally the facilities of the machine's usual C compiler are
-+used, but this cannot be done directly in cross-compilation. You must make
-+your own arrangements to provide suitable library functions for
-+cross-compilation. The embedded targets @samp{sparc-*-aout} and
-+@samp{sparclite-*-*} do provide software floating point support.
-+
-+@option{-msoft-float} changes the calling convention in the output file;
-+therefore, it is only useful if you compile @emph{all} of a program with
-+this option. In particular, you need to compile @file{libgcc.a}, the
-+library that comes with GCC, with @option{-msoft-float} in order for
-+this to work.
-+
-+@item -mhard-quad-float
-+@opindex mhard-quad-float
-+Generate output containing quad-word (long double) floating point
-+instructions.
-+
-+@item -msoft-quad-float
-+@opindex msoft-quad-float
-+Generate output containing library calls for quad-word (long double)
-+floating point instructions. The functions called are those specified
-+in the SPARC ABI@. This is the default.
-+
-+As of this writing, there are no SPARC implementations that have hardware
-+support for the quad-word floating point instructions. They all invoke
-+a trap handler for one of these instructions, and then the trap handler
-+emulates the effect of the instruction. Because of the trap handler overhead,
-+this is much slower than calling the ABI library routines. Thus the
-+@option{-msoft-quad-float} option is the default.
-+
-+@item -mno-unaligned-doubles
-+@itemx -munaligned-doubles
-+@opindex mno-unaligned-doubles
-+@opindex munaligned-doubles
-+Assume that doubles have 8 byte alignment. This is the default.
-+
-+With @option{-munaligned-doubles}, GCC assumes that doubles have 8 byte
-+alignment only if they are contained in another type, or if they have an
-+absolute address. Otherwise, it assumes they have 4 byte alignment.
-+Specifying this option avoids some rare compatibility problems with code
-+generated by other compilers. It is not the default because it results
-+in a performance loss, especially for floating point code.
-+
-+@item -mno-faster-structs
-+@itemx -mfaster-structs
-+@opindex mno-faster-structs
-+@opindex mfaster-structs
-+With @option{-mfaster-structs}, the compiler assumes that structures
-+should have 8 byte alignment. This enables the use of pairs of
-+@code{ldd} and @code{std} instructions for copies in structure
-+assignment, in place of twice as many @code{ld} and @code{st} pairs.
-+However, the use of this changed alignment directly violates the SPARC
-+ABI@. Thus, it's intended only for use on targets where the developer
-+acknowledges that their resulting code will not be directly in line with
-+the rules of the ABI@.
-+
-+@item -mimpure-text
-+@opindex mimpure-text
-+@option{-mimpure-text}, used in addition to @option{-shared}, tells
-+the compiler to not pass @option{-z text} to the linker when linking a
-+shared object. Using this option, you can link position-dependent
-+code into a shared object.
-+
-+@option{-mimpure-text} suppresses the ``relocations remain against
-+allocatable but non-writable sections'' linker error message.
-+However, the necessary relocations will trigger copy-on-write, and the
-+shared object is not actually shared across processes. Instead of
-+using @option{-mimpure-text}, you should compile all source code with
-+@option{-fpic} or @option{-fPIC}.
-+
-+This option is only available on SunOS and Solaris.
-+
-+@item -mcpu=@var{cpu_type}
-+@opindex mcpu
-+Set the instruction set, register set, and instruction scheduling parameters
-+for machine type @var{cpu_type}. Supported values for @var{cpu_type} are
-+@samp{v7}, @samp{cypress}, @samp{v8}, @samp{supersparc}, @samp{sparclite},
-+@samp{f930}, @samp{f934}, @samp{hypersparc}, @samp{sparclite86x},
-+@samp{sparclet}, @samp{tsc701}, @samp{v9}, @samp{ultrasparc},
-+@samp{ultrasparc3}, @samp{niagara} and @samp{niagara2}.
-+
-+Default instruction scheduling parameters are used for values that select
-+an architecture and not an implementation. These are @samp{v7}, @samp{v8},
-+@samp{sparclite}, @samp{sparclet}, @samp{v9}.
-+
-+Here is a list of each supported architecture and their supported
-+implementations.
-+
-+@smallexample
-+ v7: cypress
-+ v8: supersparc, hypersparc
-+ sparclite: f930, f934, sparclite86x
-+ sparclet: tsc701
-+ v9: ultrasparc, ultrasparc3, niagara, niagara2
-+@end smallexample
-+
-+By default (unless configured otherwise), GCC generates code for the V7
-+variant of the SPARC architecture. With @option{-mcpu=cypress}, the compiler
-+additionally optimizes it for the Cypress CY7C602 chip, as used in the
-+SPARCStation/SPARCServer 3xx series. This is also appropriate for the older
-+SPARCStation 1, 2, IPX etc.
-+
-+With @option{-mcpu=v8}, GCC generates code for the V8 variant of the SPARC
-+architecture. The only difference from V7 code is that the compiler emits
-+the integer multiply and integer divide instructions which exist in SPARC-V8
-+but not in SPARC-V7. With @option{-mcpu=supersparc}, the compiler additionally
-+optimizes it for the SuperSPARC chip, as used in the SPARCStation 10, 1000 and
-+2000 series.
-+
-+With @option{-mcpu=sparclite}, GCC generates code for the SPARClite variant of
-+the SPARC architecture. This adds the integer multiply, integer divide step
-+and scan (@code{ffs}) instructions which exist in SPARClite but not in SPARC-V7.
-+With @option{-mcpu=f930}, the compiler additionally optimizes it for the
-+Fujitsu MB86930 chip, which is the original SPARClite, with no FPU@. With
-+@option{-mcpu=f934}, the compiler additionally optimizes it for the Fujitsu
-+MB86934 chip, which is the more recent SPARClite with FPU@.
-+
-+With @option{-mcpu=sparclet}, GCC generates code for the SPARClet variant of
-+the SPARC architecture. This adds the integer multiply, multiply/accumulate,
-+integer divide step and scan (@code{ffs}) instructions which exist in SPARClet
-+but not in SPARC-V7. With @option{-mcpu=tsc701}, the compiler additionally
-+optimizes it for the TEMIC SPARClet chip.
-+
-+With @option{-mcpu=v9}, GCC generates code for the V9 variant of the SPARC
-+architecture. This adds 64-bit integer and floating-point move instructions,
-+3 additional floating-point condition code registers and conditional move
-+instructions. With @option{-mcpu=ultrasparc}, the compiler additionally
-+optimizes it for the Sun UltraSPARC I/II/IIi chips. With
-+@option{-mcpu=ultrasparc3}, the compiler additionally optimizes it for the
-+Sun UltraSPARC III/III+/IIIi/IIIi+/IV/IV+ chips. With
-+@option{-mcpu=niagara}, the compiler additionally optimizes it for
-+Sun UltraSPARC T1 chips. With @option{-mcpu=niagara2}, the compiler
-+additionally optimizes it for Sun UltraSPARC T2 chips.
-+
-+@item -mtune=@var{cpu_type}
-+@opindex mtune
-+Set the instruction scheduling parameters for machine type
-+@var{cpu_type}, but do not set the instruction set or register set that the
-+option @option{-mcpu=@var{cpu_type}} would.
-+
-+The same values for @option{-mcpu=@var{cpu_type}} can be used for
-+@option{-mtune=@var{cpu_type}}, but the only useful values are those
-+that select a particular cpu implementation. Those are @samp{cypress},
-+@samp{supersparc}, @samp{hypersparc}, @samp{f930}, @samp{f934},
-+@samp{sparclite86x}, @samp{tsc701}, @samp{ultrasparc},
-+@samp{ultrasparc3}, @samp{niagara}, and @samp{niagara2}.
-+
-+@item -mv8plus
-+@itemx -mno-v8plus
-+@opindex mv8plus
-+@opindex mno-v8plus
-+With @option{-mv8plus}, GCC generates code for the SPARC-V8+ ABI@. The
-+difference from the V8 ABI is that the global and out registers are
-+considered 64-bit wide. This is enabled by default on Solaris in 32-bit
-+mode for all SPARC-V9 processors.
-+
-+@item -mvis
-+@itemx -mno-vis
-+@opindex mvis
-+@opindex mno-vis
-+With @option{-mvis}, GCC generates code that takes advantage of the UltraSPARC
-+Visual Instruction Set extensions. The default is @option{-mno-vis}.
-+@end table
-+
-+These @samp{-m} options are supported in addition to the above
-+on SPARC-V9 processors in 64-bit environments:
-+
-+@table @gcctabopt
-+@item -mlittle-endian
-+@opindex mlittle-endian
-+Generate code for a processor running in little-endian mode. It is only
-+available for a few configurations and most notably not on Solaris and Linux.
-+
-+@item -m32
-+@itemx -m64
-+@opindex m32
-+@opindex m64
-+Generate code for a 32-bit or 64-bit environment.
-+The 32-bit environment sets int, long and pointer to 32 bits.
-+The 64-bit environment sets int to 32 bits and long and pointer
-+to 64 bits.
-+
-+@item -mcmodel=medlow
-+@opindex mcmodel=medlow
-+Generate code for the Medium/Low code model: 64-bit addresses, programs
-+must be linked in the low 32 bits of memory. Programs can be statically
-+or dynamically linked.
-+
-+@item -mcmodel=medmid
-+@opindex mcmodel=medmid
-+Generate code for the Medium/Middle code model: 64-bit addresses, programs
-+must be linked in the low 44 bits of memory, the text and data segments must
-+be less than 2GB in size and the data segment must be located within 2GB of
-+the text segment.
-+
-+@item -mcmodel=medany
-+@opindex mcmodel=medany
-+Generate code for the Medium/Anywhere code model: 64-bit addresses, programs
-+may be linked anywhere in memory, the text and data segments must be less
-+than 2GB in size and the data segment must be located within 2GB of the
-+text segment.
-+
-+@item -mcmodel=embmedany
-+@opindex mcmodel=embmedany
-+Generate code for the Medium/Anywhere code model for embedded systems:
-+64-bit addresses, the text and data segments must be less than 2GB in
-+size, both starting anywhere in memory (determined at link time). The
-+global register %g4 points to the base of the data segment. Programs
-+are statically linked and PIC is not supported.
-+
-+@item -mstack-bias
-+@itemx -mno-stack-bias
-+@opindex mstack-bias
-+@opindex mno-stack-bias
-+With @option{-mstack-bias}, GCC assumes that the stack pointer, and
-+frame pointer if present, are offset by @minus{}2047 which must be added back
-+when making stack frame references. This is the default in 64-bit mode.
-+Otherwise, assume no such offset is present.
-+@end table
-+
-+These switches are supported in addition to the above on Solaris:
-+
-+@table @gcctabopt
-+@item -threads
-+@opindex threads
-+Add support for multithreading using the Solaris threads library. This
-+option sets flags for both the preprocessor and linker. This option does
-+not affect the thread safety of object code produced by the compiler or
-+that of libraries supplied with it.
-+
-+@item -pthreads
-+@opindex pthreads
-+Add support for multithreading using the POSIX threads library. This
-+option sets flags for both the preprocessor and linker. This option does
-+not affect the thread safety of object code produced by the compiler or
-+that of libraries supplied with it.
-+
-+@item -pthread
-+@opindex pthread
-+This is a synonym for @option{-pthreads}.
-+@end table
-+
-+@node SPU Options
-+@subsection SPU Options
-+@cindex SPU options
-+
-+These @samp{-m} options are supported on the SPU:
-+
-+@table @gcctabopt
-+@item -mwarn-reloc
-+@itemx -merror-reloc
-+@opindex mwarn-reloc
-+@opindex merror-reloc
-+
-+The loader for SPU does not handle dynamic relocations. By default, GCC
-+will give an error when it generates code that requires a dynamic
-+relocation. @option{-mno-error-reloc} disables the error,
-+@option{-mwarn-reloc} will generate a warning instead.
-+
-+@item -msafe-dma
-+@itemx -munsafe-dma
-+@opindex msafe-dma
-+@opindex munsafe-dma
-+
-+Instructions which initiate or test completion of DMA must not be
-+reordered with respect to loads and stores of the memory which is being
-+accessed. Users typically address this problem using the volatile
-+keyword, but that can lead to inefficient code in places where the
-+memory is known to not change. Rather than mark the memory as volatile
-+we treat the DMA instructions as potentially effecting all memory. With
-+@option{-munsafe-dma} users must use the volatile keyword to protect
-+memory accesses.
-+
-+@item -mbranch-hints
-+@opindex mbranch-hints
-+
-+By default, GCC will generate a branch hint instruction to avoid
-+pipeline stalls for always taken or probably taken branches. A hint
-+will not be generated closer than 8 instructions away from its branch.
-+There is little reason to disable them, except for debugging purposes,
-+or to make an object a little bit smaller.
-+
-+@item -msmall-mem
-+@itemx -mlarge-mem
-+@opindex msmall-mem
-+@opindex mlarge-mem
-+
-+By default, GCC generates code assuming that addresses are never larger
-+than 18 bits. With @option{-mlarge-mem} code is generated that assumes
-+a full 32 bit address.
-+
-+@item -mstdmain
-+@opindex mstdmain
-+
-+By default, GCC links against startup code that assumes the SPU-style
-+main function interface (which has an unconventional parameter list).
-+With @option{-mstdmain}, GCC will link your program against startup
-+code that assumes a C99-style interface to @code{main}, including a
-+local copy of @code{argv} strings.
-+
-+@item -mfixed-range=@var{register-range}
-+@opindex mfixed-range
-+Generate code treating the given register range as fixed registers.
-+A fixed register is one that the register allocator can not use. This is
-+useful when compiling kernel code. A register range is specified as
-+two registers separated by a dash. Multiple register ranges can be
-+specified separated by a comma.
-+
-+@item -mdual-nops
-+@itemx -mdual-nops=@var{n}
-+@opindex mdual-nops
-+By default, GCC will insert nops to increase dual issue when it expects
-+it to increase performance. @var{n} can be a value from 0 to 10. A
-+smaller @var{n} will insert fewer nops. 10 is the default, 0 is the
-+same as @option{-mno-dual-nops}. Disabled with @option{-Os}.
-+
-+@item -mhint-max-nops=@var{n}
-+@opindex mhint-max-nops
-+Maximum number of nops to insert for a branch hint. A branch hint must
-+be at least 8 instructions away from the branch it is effecting. GCC
-+will insert up to @var{n} nops to enforce this, otherwise it will not
-+generate the branch hint.
-+
-+@item -mhint-max-distance=@var{n}
-+@opindex mhint-max-distance
-+The encoding of the branch hint instruction limits the hint to be within
-+256 instructions of the branch it is effecting. By default, GCC makes
-+sure it is within 125.
-+
-+@item -msafe-hints
-+@opindex msafe-hints
-+Work around a hardware bug which causes the SPU to stall indefinitely.
-+By default, GCC will insert the @code{hbrp} instruction to make sure
-+this stall won't happen.
-+
-+@end table
-+
-+@node System V Options
-+@subsection Options for System V
-+
-+These additional options are available on System V Release 4 for
-+compatibility with other compilers on those systems:
-+
-+@table @gcctabopt
-+@item -G
-+@opindex G
-+Create a shared object.
-+It is recommended that @option{-symbolic} or @option{-shared} be used instead.
-+
-+@item -Qy
-+@opindex Qy
-+Identify the versions of each tool used by the compiler, in a
-+@code{.ident} assembler directive in the output.
-+
-+@item -Qn
-+@opindex Qn
-+Refrain from adding @code{.ident} directives to the output file (this is
-+the default).
-+
-+@item -YP,@var{dirs}
-+@opindex YP
-+Search the directories @var{dirs}, and no others, for libraries
-+specified with @option{-l}.
-+
-+@item -Ym,@var{dir}
-+@opindex Ym
-+Look in the directory @var{dir} to find the M4 preprocessor.
-+The assembler uses this option.
-+@c This is supposed to go with a -Yd for predefined M4 macro files, but
-+@c the generic assembler that comes with Solaris takes just -Ym.
-+@end table
-+
-+@node V850 Options
-+@subsection V850 Options
-+@cindex V850 Options
-+
-+These @samp{-m} options are defined for V850 implementations:
-+
-+@table @gcctabopt
-+@item -mlong-calls
-+@itemx -mno-long-calls
-+@opindex mlong-calls
-+@opindex mno-long-calls
-+Treat all calls as being far away (near). If calls are assumed to be
-+far away, the compiler will always load the functions address up into a
-+register, and call indirect through the pointer.
-+
-+@item -mno-ep
-+@itemx -mep
-+@opindex mno-ep
-+@opindex mep
-+Do not optimize (do optimize) basic blocks that use the same index
-+pointer 4 or more times to copy pointer into the @code{ep} register, and
-+use the shorter @code{sld} and @code{sst} instructions. The @option{-mep}
-+option is on by default if you optimize.
-+
-+@item -mno-prolog-function
-+@itemx -mprolog-function
-+@opindex mno-prolog-function
-+@opindex mprolog-function
-+Do not use (do use) external functions to save and restore registers
-+at the prologue and epilogue of a function. The external functions
-+are slower, but use less code space if more than one function saves
-+the same number of registers. The @option{-mprolog-function} option
-+is on by default if you optimize.
-+
-+@item -mspace
-+@opindex mspace
-+Try to make the code as small as possible. At present, this just turns
-+on the @option{-mep} and @option{-mprolog-function} options.
-+
-+@item -mtda=@var{n}
-+@opindex mtda
-+Put static or global variables whose size is @var{n} bytes or less into
-+the tiny data area that register @code{ep} points to. The tiny data
-+area can hold up to 256 bytes in total (128 bytes for byte references).
-+
-+@item -msda=@var{n}
-+@opindex msda
-+Put static or global variables whose size is @var{n} bytes or less into
-+the small data area that register @code{gp} points to. The small data
-+area can hold up to 64 kilobytes.
-+
-+@item -mzda=@var{n}
-+@opindex mzda
-+Put static or global variables whose size is @var{n} bytes or less into
-+the first 32 kilobytes of memory.
-+
-+@item -mv850
-+@opindex mv850
-+Specify that the target processor is the V850.
-+
-+@item -mbig-switch
-+@opindex mbig-switch
-+Generate code suitable for big switch tables. Use this option only if
-+the assembler/linker complain about out of range branches within a switch
-+table.
-+
-+@item -mapp-regs
-+@opindex mapp-regs
-+This option will cause r2 and r5 to be used in the code generated by
-+the compiler. This setting is the default.
-+
-+@item -mno-app-regs
-+@opindex mno-app-regs
-+This option will cause r2 and r5 to be treated as fixed registers.
-+
-+@item -mv850e1
-+@opindex mv850e1
-+Specify that the target processor is the V850E1. The preprocessor
-+constants @samp{__v850e1__} and @samp{__v850e__} will be defined if
-+this option is used.
-+
-+@item -mv850e
-+@opindex mv850e
-+Specify that the target processor is the V850E@. The preprocessor
-+constant @samp{__v850e__} will be defined if this option is used.
-+
-+If neither @option{-mv850} nor @option{-mv850e} nor @option{-mv850e1}
-+are defined then a default target processor will be chosen and the
-+relevant @samp{__v850*__} preprocessor constant will be defined.
-+
-+The preprocessor constants @samp{__v850} and @samp{__v851__} are always
-+defined, regardless of which processor variant is the target.
-+
-+@item -mdisable-callt
-+@opindex mdisable-callt
-+This option will suppress generation of the CALLT instruction for the
-+v850e and v850e1 flavors of the v850 architecture. The default is
-+@option{-mno-disable-callt} which allows the CALLT instruction to be used.
-+
-+@end table
-+
-+@node VAX Options
-+@subsection VAX Options
-+@cindex VAX options
-+
-+These @samp{-m} options are defined for the VAX:
-+
-+@table @gcctabopt
-+@item -munix
-+@opindex munix
-+Do not output certain jump instructions (@code{aobleq} and so on)
-+that the Unix assembler for the VAX cannot handle across long
-+ranges.
-+
-+@item -mgnu
-+@opindex mgnu
-+Do output those jump instructions, on the assumption that you
-+will assemble with the GNU assembler.
-+
-+@item -mg
-+@opindex mg
-+Output code for g-format floating point numbers instead of d-format.
-+@end table
-+
-+@node VxWorks Options
-+@subsection VxWorks Options
-+@cindex VxWorks Options
-+
-+The options in this section are defined for all VxWorks targets.
-+Options specific to the target hardware are listed with the other
-+options for that target.
-+
-+@table @gcctabopt
-+@item -mrtp
-+@opindex mrtp
-+GCC can generate code for both VxWorks kernels and real time processes
-+(RTPs). This option switches from the former to the latter. It also
-+defines the preprocessor macro @code{__RTP__}.
-+
-+@item -non-static
-+@opindex non-static
-+Link an RTP executable against shared libraries rather than static
-+libraries. The options @option{-static} and @option{-shared} can
-+also be used for RTPs (@pxref{Link Options}); @option{-static}
-+is the default.
-+
-+@item -Bstatic
-+@itemx -Bdynamic
-+@opindex Bstatic
-+@opindex Bdynamic
-+These options are passed down to the linker. They are defined for
-+compatibility with Diab.
-+
-+@item -Xbind-lazy
-+@opindex Xbind-lazy
-+Enable lazy binding of function calls. This option is equivalent to
-+@option{-Wl,-z,now} and is defined for compatibility with Diab.
-+
-+@item -Xbind-now
-+@opindex Xbind-now
-+Disable lazy binding of function calls. This option is the default and
-+is defined for compatibility with Diab.
-+@end table
-+
-+@node x86-64 Options
-+@subsection x86-64 Options
-+@cindex x86-64 options
-+
-+These are listed under @xref{i386 and x86-64 Options}.
-+
-+@node Xstormy16 Options
-+@subsection Xstormy16 Options
-+@cindex Xstormy16 Options
-+
-+These options are defined for Xstormy16:
-+
-+@table @gcctabopt
-+@item -msim
-+@opindex msim
-+Choose startup files and linker script suitable for the simulator.
-+@end table
-+
-+@node Xtensa Options
-+@subsection Xtensa Options
-+@cindex Xtensa Options
-+
-+These options are supported for Xtensa targets:
-+
-+@table @gcctabopt
-+@item -mconst16
-+@itemx -mno-const16
-+@opindex mconst16
-+@opindex mno-const16
-+Enable or disable use of @code{CONST16} instructions for loading
-+constant values. The @code{CONST16} instruction is currently not a
-+standard option from Tensilica. When enabled, @code{CONST16}
-+instructions are always used in place of the standard @code{L32R}
-+instructions. The use of @code{CONST16} is enabled by default only if
-+the @code{L32R} instruction is not available.
-+
-+@item -mfused-madd
-+@itemx -mno-fused-madd
-+@opindex mfused-madd
-+@opindex mno-fused-madd
-+Enable or disable use of fused multiply/add and multiply/subtract
-+instructions in the floating-point option. This has no effect if the
-+floating-point option is not also enabled. Disabling fused multiply/add
-+and multiply/subtract instructions forces the compiler to use separate
-+instructions for the multiply and add/subtract operations. This may be
-+desirable in some cases where strict IEEE 754-compliant results are
-+required: the fused multiply add/subtract instructions do not round the
-+intermediate result, thereby producing results with @emph{more} bits of
-+precision than specified by the IEEE standard. Disabling fused multiply
-+add/subtract instructions also ensures that the program output is not
-+sensitive to the compiler's ability to combine multiply and add/subtract
-+operations.
-+
-+@item -mserialize-volatile
-+@itemx -mno-serialize-volatile
-+@opindex mserialize-volatile
-+@opindex mno-serialize-volatile
-+When this option is enabled, GCC inserts @code{MEMW} instructions before
-+@code{volatile} memory references to guarantee sequential consistency.
-+The default is @option{-mserialize-volatile}. Use
-+@option{-mno-serialize-volatile} to omit the @code{MEMW} instructions.
-+
-+@item -mtext-section-literals
-+@itemx -mno-text-section-literals
-+@opindex mtext-section-literals
-+@opindex mno-text-section-literals
-+Control the treatment of literal pools. The default is
-+@option{-mno-text-section-literals}, which places literals in a separate
-+section in the output file. This allows the literal pool to be placed
-+in a data RAM/ROM, and it also allows the linker to combine literal
-+pools from separate object files to remove redundant literals and
-+improve code size. With @option{-mtext-section-literals}, the literals
-+are interspersed in the text section in order to keep them as close as
-+possible to their references. This may be necessary for large assembly
-+files.
-+
-+@item -mtarget-align
-+@itemx -mno-target-align
-+@opindex mtarget-align
-+@opindex mno-target-align
-+When this option is enabled, GCC instructs the assembler to
-+automatically align instructions to reduce branch penalties at the
-+expense of some code density. The assembler attempts to widen density
-+instructions to align branch targets and the instructions following call
-+instructions. If there are not enough preceding safe density
-+instructions to align a target, no widening will be performed. The
-+default is @option{-mtarget-align}. These options do not affect the
-+treatment of auto-aligned instructions like @code{LOOP}, which the
-+assembler will always align, either by widening density instructions or
-+by inserting no-op instructions.
-+
-+@item -mlongcalls
-+@itemx -mno-longcalls
-+@opindex mlongcalls
-+@opindex mno-longcalls
-+When this option is enabled, GCC instructs the assembler to translate
-+direct calls to indirect calls unless it can determine that the target
-+of a direct call is in the range allowed by the call instruction. This
-+translation typically occurs for calls to functions in other source
-+files. Specifically, the assembler translates a direct @code{CALL}
-+instruction into an @code{L32R} followed by a @code{CALLX} instruction.
-+The default is @option{-mno-longcalls}. This option should be used in
-+programs where the call target can potentially be out of range. This
-+option is implemented in the assembler, not the compiler, so the
-+assembly code generated by GCC will still show direct call
-+instructions---look at the disassembled object code to see the actual
-+instructions. Note that the assembler will use an indirect call for
-+every cross-file call, not just those that really will be out of range.
-+@end table
-+
-+@node zSeries Options
-+@subsection zSeries Options
-+@cindex zSeries options
-+
-+These are listed under @xref{S/390 and zSeries Options}.
-+
-+@node Code Gen Options
-+@section Options for Code Generation Conventions
-+@cindex code generation conventions
-+@cindex options, code generation
-+@cindex run-time options
-+
-+These machine-independent options control the interface conventions
-+used in code generation.
-+
-+Most of them have both positive and negative forms; the negative form
-+of @option{-ffoo} would be @option{-fno-foo}. In the table below, only
-+one of the forms is listed---the one which is not the default. You
-+can figure out the other form by either removing @samp{no-} or adding
-+it.
-+
-+@table @gcctabopt
-+@item -fbounds-check
-+@opindex fbounds-check
-+For front-ends that support it, generate additional code to check that
-+indices used to access arrays are within the declared range. This is
-+currently only supported by the Java and Fortran front-ends, where
-+this option defaults to true and false respectively.
-+
-+@item -ftrapv
-+@opindex ftrapv
-+This option generates traps for signed overflow on addition, subtraction,
-+multiplication operations.
-+
-+@item -fwrapv
-+@opindex fwrapv
-+This option instructs the compiler to assume that signed arithmetic
-+overflow of addition, subtraction and multiplication wraps around
-+using twos-complement representation. This flag enables some optimizations
-+and disables others. This option is enabled by default for the Java
-+front-end, as required by the Java language specification.
-+
-+@item -fexceptions
-+@opindex fexceptions
-+Enable exception handling. Generates extra code needed to propagate
-+exceptions. For some targets, this implies GCC will generate frame
-+unwind information for all functions, which can produce significant data
-+size overhead, although it does not affect execution. If you do not
-+specify this option, GCC will enable it by default for languages like
-+C++ which normally require exception handling, and disable it for
-+languages like C that do not normally require it. However, you may need
-+to enable this option when compiling C code that needs to interoperate
-+properly with exception handlers written in C++. You may also wish to
-+disable this option if you are compiling older C++ programs that don't
-+use exception handling.
-+
-+@item -fnon-call-exceptions
-+@opindex fnon-call-exceptions
-+Generate code that allows trapping instructions to throw exceptions.
-+Note that this requires platform-specific runtime support that does
-+not exist everywhere. Moreover, it only allows @emph{trapping}
-+instructions to throw exceptions, i.e.@: memory references or floating
-+point instructions. It does not allow exceptions to be thrown from
-+arbitrary signal handlers such as @code{SIGALRM}.
-+
-+@item -funwind-tables
-+@opindex funwind-tables
-+Similar to @option{-fexceptions}, except that it will just generate any needed
-+static data, but will not affect the generated code in any other way.
-+You will normally not enable this option; instead, a language processor
-+that needs this handling would enable it on your behalf.
-+
-+@item -fasynchronous-unwind-tables
-+@opindex fasynchronous-unwind-tables
-+Generate unwind table in dwarf2 format, if supported by target machine. The
-+table is exact at each instruction boundary, so it can be used for stack
-+unwinding from asynchronous events (such as debugger or garbage collector).
-+
-+@item -fpcc-struct-return
-+@opindex fpcc-struct-return
-+Return ``short'' @code{struct} and @code{union} values in memory like
-+longer ones, rather than in registers. This convention is less
-+efficient, but it has the advantage of allowing intercallability between
-+GCC-compiled files and files compiled with other compilers, particularly
-+the Portable C Compiler (pcc).
-+
-+The precise convention for returning structures in memory depends
-+on the target configuration macros.
-+
-+Short structures and unions are those whose size and alignment match
-+that of some integer type.
-+
-+@strong{Warning:} code compiled with the @option{-fpcc-struct-return}
-+switch is not binary compatible with code compiled with the
-+@option{-freg-struct-return} switch.
-+Use it to conform to a non-default application binary interface.
-+
-+@item -freg-struct-return
-+@opindex freg-struct-return
-+Return @code{struct} and @code{union} values in registers when possible.
-+This is more efficient for small structures than
-+@option{-fpcc-struct-return}.
-+
-+If you specify neither @option{-fpcc-struct-return} nor
-+@option{-freg-struct-return}, GCC defaults to whichever convention is
-+standard for the target. If there is no standard convention, GCC
-+defaults to @option{-fpcc-struct-return}, except on targets where GCC is
-+the principal compiler. In those cases, we can choose the standard, and
-+we chose the more efficient register return alternative.
-+
-+@strong{Warning:} code compiled with the @option{-freg-struct-return}
-+switch is not binary compatible with code compiled with the
-+@option{-fpcc-struct-return} switch.
-+Use it to conform to a non-default application binary interface.
-+
-+@item -fshort-enums
-+@opindex fshort-enums
-+Allocate to an @code{enum} type only as many bytes as it needs for the
-+declared range of possible values. Specifically, the @code{enum} type
-+will be equivalent to the smallest integer type which has enough room.
-+
-+@strong{Warning:} the @option{-fshort-enums} switch causes GCC to generate
-+code that is not binary compatible with code generated without that switch.
-+Use it to conform to a non-default application binary interface.
-+
-+@item -fshort-double
-+@opindex fshort-double
-+Use the same size for @code{double} as for @code{float}.
-+
-+@strong{Warning:} the @option{-fshort-double} switch causes GCC to generate
-+code that is not binary compatible with code generated without that switch.
-+Use it to conform to a non-default application binary interface.
-+
-+@item -fshort-wchar
-+@opindex fshort-wchar
-+Override the underlying type for @samp{wchar_t} to be @samp{short
-+unsigned int} instead of the default for the target. This option is
-+useful for building programs to run under WINE@.
-+
-+@strong{Warning:} the @option{-fshort-wchar} switch causes GCC to generate
-+code that is not binary compatible with code generated without that switch.
-+Use it to conform to a non-default application binary interface.
-+
-+@item -fno-common
-+@opindex fno-common
-+In C code, controls the placement of uninitialized global variables.
-+Unix C compilers have traditionally permitted multiple definitions of
-+such variables in different compilation units by placing the variables
-+in a common block.
-+This is the behavior specified by @option{-fcommon}, and is the default
-+for GCC on most targets.
-+On the other hand, this behavior is not required by ISO C, and on some
-+targets may carry a speed or code size penalty on variable references.
-+The @option{-fno-common} option specifies that the compiler should place
-+uninitialized global variables in the data section of the object file,
-+rather than generating them as common blocks.
-+This has the effect that if the same variable is declared
-+(without @code{extern}) in two different compilations,
-+you will get a multiple-definition error when you link them.
-+In this case, you must compile with @option{-fcommon} instead.
-+Compiling with @option{-fno-common} is useful on targets for which
-+it provides better performance, or if you wish to verify that the
-+program will work on other systems which always treat uninitialized
-+variable declarations this way.
-+
-+@item -fno-ident
-+@opindex fno-ident
-+Ignore the @samp{#ident} directive.
-+
-+@item -finhibit-size-directive
-+@opindex finhibit-size-directive
-+Don't output a @code{.size} assembler directive, or anything else that
-+would cause trouble if the function is split in the middle, and the
-+two halves are placed at locations far apart in memory. This option is
-+used when compiling @file{crtstuff.c}; you should not need to use it
-+for anything else.
-+
-+@item -fverbose-asm
-+@opindex fverbose-asm
-+Put extra commentary information in the generated assembly code to
-+make it more readable. This option is generally only of use to those
-+who actually need to read the generated assembly code (perhaps while
-+debugging the compiler itself).
-+
-+@option{-fno-verbose-asm}, the default, causes the
-+extra information to be omitted and is useful when comparing two assembler
-+files.
-+
-+@item -frecord-gcc-switches
-+@opindex frecord-gcc-switches
-+This switch causes the command line that was used to invoke the
-+compiler to be recorded into the object file that is being created.
-+This switch is only implemented on some targets and the exact format
-+of the recording is target and binary file format dependent, but it
-+usually takes the form of a section containing ASCII text. This
-+switch is related to the @option{-fverbose-asm} switch, but that
-+switch only records information in the assembler output file as
-+comments, so it never reaches the object file.
-+
-+@item -fpic
-+@opindex fpic
-+@cindex global offset table
-+@cindex PIC
-+Generate position-independent code (PIC) suitable for use in a shared
-+library, if supported for the target machine. Such code accesses all
-+constant addresses through a global offset table (GOT)@. The dynamic
-+loader resolves the GOT entries when the program starts (the dynamic
-+loader is not part of GCC; it is part of the operating system). If
-+the GOT size for the linked executable exceeds a machine-specific
-+maximum size, you get an error message from the linker indicating that
-+@option{-fpic} does not work; in that case, recompile with @option{-fPIC}
-+instead. (These maximums are 8k on the SPARC and 32k
-+on the m68k and RS/6000. The 386 has no such limit.)
-+
-+Position-independent code requires special support, and therefore works
-+only on certain machines. For the 386, GCC supports PIC for System V
-+but not for the Sun 386i. Code generated for the IBM RS/6000 is always
-+position-independent.
-+
-+When this flag is set, the macros @code{__pic__} and @code{__PIC__}
-+are defined to 1.
-+
-+@item -fPIC
-+@opindex fPIC
-+If supported for the target machine, emit position-independent code,
-+suitable for dynamic linking and avoiding any limit on the size of the
-+global offset table. This option makes a difference on the m68k,
-+PowerPC and SPARC@.
-+
-+Position-independent code requires special support, and therefore works
-+only on certain machines.
-+
-+When this flag is set, the macros @code{__pic__} and @code{__PIC__}
-+are defined to 2.
-+
-+@item -fpie
-+@itemx -fPIE
-+@opindex fpie
-+@opindex fPIE
-+These options are similar to @option{-fpic} and @option{-fPIC}, but
-+generated position independent code can be only linked into executables.
-+Usually these options are used when @option{-pie} GCC option will be
-+used during linking.
-+
-+@option{-fpie} and @option{-fPIE} both define the macros
-+@code{__pie__} and @code{__PIE__}. The macros have the value 1
-+for @option{-fpie} and 2 for @option{-fPIE}.
-+
-+@item -fno-jump-tables
-+@opindex fno-jump-tables
-+Do not use jump tables for switch statements even where it would be
-+more efficient than other code generation strategies. This option is
-+of use in conjunction with @option{-fpic} or @option{-fPIC} for
-+building code which forms part of a dynamic linker and cannot
-+reference the address of a jump table. On some targets, jump tables
-+do not require a GOT and this option is not needed.
-+
-+@item -ffixed-@var{reg}
-+@opindex ffixed
-+Treat the register named @var{reg} as a fixed register; generated code
-+should never refer to it (except perhaps as a stack pointer, frame
-+pointer or in some other fixed role).
-+
-+@var{reg} must be the name of a register. The register names accepted
-+are machine-specific and are defined in the @code{REGISTER_NAMES}
-+macro in the machine description macro file.
-+
-+This flag does not have a negative form, because it specifies a
-+three-way choice.
-+
-+@item -fcall-used-@var{reg}
-+@opindex fcall-used
-+Treat the register named @var{reg} as an allocable register that is
-+clobbered by function calls. It may be allocated for temporaries or
-+variables that do not live across a call. Functions compiled this way
-+will not save and restore the register @var{reg}.
-+
-+It is an error to used this flag with the frame pointer or stack pointer.
-+Use of this flag for other registers that have fixed pervasive roles in
-+the machine's execution model will produce disastrous results.
-+
-+This flag does not have a negative form, because it specifies a
-+three-way choice.
-+
-+@item -fcall-saved-@var{reg}
-+@opindex fcall-saved
-+Treat the register named @var{reg} as an allocable register saved by
-+functions. It may be allocated even for temporaries or variables that
-+live across a call. Functions compiled this way will save and restore
-+the register @var{reg} if they use it.
-+
-+It is an error to used this flag with the frame pointer or stack pointer.
-+Use of this flag for other registers that have fixed pervasive roles in
-+the machine's execution model will produce disastrous results.
-+
-+A different sort of disaster will result from the use of this flag for
-+a register in which function values may be returned.
-+
-+This flag does not have a negative form, because it specifies a
-+three-way choice.
-+
-+@item -fpack-struct[=@var{n}]
-+@opindex fpack-struct
-+Without a value specified, pack all structure members together without
-+holes. When a value is specified (which must be a small power of two), pack
-+structure members according to this value, representing the maximum
-+alignment (that is, objects with default alignment requirements larger than
-+this will be output potentially unaligned at the next fitting location.
-+
-+@strong{Warning:} the @option{-fpack-struct} switch causes GCC to generate
-+code that is not binary compatible with code generated without that switch.
-+Additionally, it makes the code suboptimal.
-+Use it to conform to a non-default application binary interface.
-+
-+@item -finstrument-functions
-+@opindex finstrument-functions
-+Generate instrumentation calls for entry and exit to functions. Just
-+after function entry and just before function exit, the following
-+profiling functions will be called with the address of the current
-+function and its call site. (On some platforms,
-+@code{__builtin_return_address} does not work beyond the current
-+function, so the call site information may not be available to the
-+profiling functions otherwise.)
-+
-+@smallexample
-+void __cyg_profile_func_enter (void *this_fn,
-+ void *call_site);
-+void __cyg_profile_func_exit (void *this_fn,
-+ void *call_site);
-+@end smallexample
-+
-+The first argument is the address of the start of the current function,
-+which may be looked up exactly in the symbol table.
-+
-+This instrumentation is also done for functions expanded inline in other
-+functions. The profiling calls will indicate where, conceptually, the
-+inline function is entered and exited. This means that addressable
-+versions of such functions must be available. If all your uses of a
-+function are expanded inline, this may mean an additional expansion of
-+code size. If you use @samp{extern inline} in your C code, an
-+addressable version of such functions must be provided. (This is
-+normally the case anyways, but if you get lucky and the optimizer always
-+expands the functions inline, you might have gotten away without
-+providing static copies.)
-+
-+A function may be given the attribute @code{no_instrument_function}, in
-+which case this instrumentation will not be done. This can be used, for
-+example, for the profiling functions listed above, high-priority
-+interrupt routines, and any functions from which the profiling functions
-+cannot safely be called (perhaps signal handlers, if the profiling
-+routines generate output or allocate memory).
-+
-+@item -finstrument-functions-exclude-file-list=@var{file},@var{file},@dots{}
-+@opindex finstrument-functions-exclude-file-list
-+
-+Set the list of functions that are excluded from instrumentation (see
-+the description of @code{-finstrument-functions}). If the file that
-+contains a function definition matches with one of @var{file}, then
-+that function is not instrumented. The match is done on substrings:
-+if the @var{file} parameter is a substring of the file name, it is
-+considered to be a match.
-+
-+For example,
-+@code{-finstrument-functions-exclude-file-list=/bits/stl,include/sys}
-+will exclude any inline function defined in files whose pathnames
-+contain @code{/bits/stl} or @code{include/sys}.
-+
-+If, for some reason, you want to include letter @code{','} in one of
-+@var{sym}, write @code{'\,'}. For example,
-+@code{-finstrument-functions-exclude-file-list='\,\,tmp'}
-+(note the single quote surrounding the option).
-+
-+@item -finstrument-functions-exclude-function-list=@var{sym},@var{sym},@dots{}
-+@opindex finstrument-functions-exclude-function-list
-+
-+This is similar to @code{-finstrument-functions-exclude-file-list},
-+but this option sets the list of function names to be excluded from
-+instrumentation. The function name to be matched is its user-visible
-+name, such as @code{vector<int> blah(const vector<int> &)}, not the
-+internal mangled name (e.g., @code{_Z4blahRSt6vectorIiSaIiEE}). The
-+match is done on substrings: if the @var{sym} parameter is a substring
-+of the function name, it is considered to be a match.
-+
-+@item -fstack-check
-+@opindex fstack-check
-+Generate code to verify that you do not go beyond the boundary of the
-+stack. You should specify this flag if you are running in an
-+environment with multiple threads, but only rarely need to specify it in
-+a single-threaded environment since stack overflow is automatically
-+detected on nearly all systems if there is only one stack.
-+
-+Note that this switch does not actually cause checking to be done; the
-+operating system or the language runtime must do that. The switch causes
-+generation of code to ensure that they see the stack being extended.
-+
-+You can additionally specify a string parameter: @code{no} means no
-+checking, @code{generic} means force the use of old-style checking,
-+@code{specific} means use the best checking method and is equivalent
-+to bare @option{-fstack-check}.
-+
-+Old-style checking is a generic mechanism that requires no specific
-+target support in the compiler but comes with the following drawbacks:
-+
-+@enumerate
-+@item
-+Modified allocation strategy for large objects: they will always be
-+allocated dynamically if their size exceeds a fixed threshold.
-+
-+@item
-+Fixed limit on the size of the static frame of functions: when it is
-+topped by a particular function, stack checking is not reliable and
-+a warning is issued by the compiler.
-+
-+@item
-+Inefficiency: because of both the modified allocation strategy and the
-+generic implementation, the performances of the code are hampered.
-+@end enumerate
-+
-+Note that old-style stack checking is also the fallback method for
-+@code{specific} if no target support has been added in the compiler.
-+
-+@item -fstack-limit-register=@var{reg}
-+@itemx -fstack-limit-symbol=@var{sym}
-+@itemx -fno-stack-limit
-+@opindex fstack-limit-register
-+@opindex fstack-limit-symbol
-+@opindex fno-stack-limit
-+Generate code to ensure that the stack does not grow beyond a certain value,
-+either the value of a register or the address of a symbol. If the stack
-+would grow beyond the value, a signal is raised. For most targets,
-+the signal is raised before the stack overruns the boundary, so
-+it is possible to catch the signal without taking special precautions.
-+
-+For instance, if the stack starts at absolute address @samp{0x80000000}
-+and grows downwards, you can use the flags
-+@option{-fstack-limit-symbol=__stack_limit} and
-+@option{-Wl,--defsym,__stack_limit=0x7ffe0000} to enforce a stack limit
-+of 128KB@. Note that this may only work with the GNU linker.
-+
-+@cindex aliasing of parameters
-+@cindex parameters, aliased
-+@item -fargument-alias
-+@itemx -fargument-noalias
-+@itemx -fargument-noalias-global
-+@itemx -fargument-noalias-anything
-+@opindex fargument-alias
-+@opindex fargument-noalias
-+@opindex fargument-noalias-global
-+@opindex fargument-noalias-anything
-+Specify the possible relationships among parameters and between
-+parameters and global data.
-+
-+@option{-fargument-alias} specifies that arguments (parameters) may
-+alias each other and may alias global storage.@*
-+@option{-fargument-noalias} specifies that arguments do not alias
-+each other, but may alias global storage.@*
-+@option{-fargument-noalias-global} specifies that arguments do not
-+alias each other and do not alias global storage.
-+@option{-fargument-noalias-anything} specifies that arguments do not
-+alias any other storage.
-+
-+Each language will automatically use whatever option is required by
-+the language standard. You should not need to use these options yourself.
-+
-+@item -fleading-underscore
-+@opindex fleading-underscore
-+This option and its counterpart, @option{-fno-leading-underscore}, forcibly
-+change the way C symbols are represented in the object file. One use
-+is to help link with legacy assembly code.
-+
-+@strong{Warning:} the @option{-fleading-underscore} switch causes GCC to
-+generate code that is not binary compatible with code generated without that
-+switch. Use it to conform to a non-default application binary interface.
-+Not all targets provide complete support for this switch.
-+
-+@item -ftls-model=@var{model}
-+@opindex ftls-model
-+Alter the thread-local storage model to be used (@pxref{Thread-Local}).
-+The @var{model} argument should be one of @code{global-dynamic},
-+@code{local-dynamic}, @code{initial-exec} or @code{local-exec}.
-+
-+The default without @option{-fpic} is @code{initial-exec}; with
-+@option{-fpic} the default is @code{global-dynamic}.
-+
-+@item -fvisibility=@var{default|internal|hidden|protected}
-+@opindex fvisibility
-+Set the default ELF image symbol visibility to the specified option---all
-+symbols will be marked with this unless overridden within the code.
-+Using this feature can very substantially improve linking and
-+load times of shared object libraries, produce more optimized
-+code, provide near-perfect API export and prevent symbol clashes.
-+It is @strong{strongly} recommended that you use this in any shared objects
-+you distribute.
-+
-+Despite the nomenclature, @code{default} always means public ie;
-+available to be linked against from outside the shared object.
-+@code{protected} and @code{internal} are pretty useless in real-world
-+usage so the only other commonly used option will be @code{hidden}.
-+The default if @option{-fvisibility} isn't specified is
-+@code{default}, i.e., make every
-+symbol public---this causes the same behavior as previous versions of
-+GCC@.
-+
-+A good explanation of the benefits offered by ensuring ELF
-+symbols have the correct visibility is given by ``How To Write
-+Shared Libraries'' by Ulrich Drepper (which can be found at
-+@w{@uref{http://people.redhat.com/~drepper/}})---however a superior
-+solution made possible by this option to marking things hidden when
-+the default is public is to make the default hidden and mark things
-+public. This is the norm with DLL's on Windows and with @option{-fvisibility=hidden}
-+and @code{__attribute__ ((visibility("default")))} instead of
-+@code{__declspec(dllexport)} you get almost identical semantics with
-+identical syntax. This is a great boon to those working with
-+cross-platform projects.
-+
-+For those adding visibility support to existing code, you may find
-+@samp{#pragma GCC visibility} of use. This works by you enclosing
-+the declarations you wish to set visibility for with (for example)
-+@samp{#pragma GCC visibility push(hidden)} and
-+@samp{#pragma GCC visibility pop}.
-+Bear in mind that symbol visibility should be viewed @strong{as
-+part of the API interface contract} and thus all new code should
-+always specify visibility when it is not the default ie; declarations
-+only for use within the local DSO should @strong{always} be marked explicitly
-+as hidden as so to avoid PLT indirection overheads---making this
-+abundantly clear also aids readability and self-documentation of the code.
-+Note that due to ISO C++ specification requirements, operator new and
-+operator delete must always be of default visibility.
-+
-+Be aware that headers from outside your project, in particular system
-+headers and headers from any other library you use, may not be
-+expecting to be compiled with visibility other than the default. You
-+may need to explicitly say @samp{#pragma GCC visibility push(default)}
-+before including any such headers.
-+
-+@samp{extern} declarations are not affected by @samp{-fvisibility}, so
-+a lot of code can be recompiled with @samp{-fvisibility=hidden} with
-+no modifications. However, this means that calls to @samp{extern}
-+functions with no explicit visibility will use the PLT, so it is more
-+effective to use @samp{__attribute ((visibility))} and/or
-+@samp{#pragma GCC visibility} to tell the compiler which @samp{extern}
-+declarations should be treated as hidden.
-+
-+Note that @samp{-fvisibility} does affect C++ vague linkage
-+entities. This means that, for instance, an exception class that will
-+be thrown between DSOs must be explicitly marked with default
-+visibility so that the @samp{type_info} nodes will be unified between
-+the DSOs.
-+
-+An overview of these techniques, their benefits and how to use them
-+is at @w{@uref{http://gcc.gnu.org/wiki/Visibility}}.
-+
-+@end table
-+
-+@c man end
-+
-+@node Environment Variables
-+@section Environment Variables Affecting GCC
-+@cindex environment variables
-+
-+@c man begin ENVIRONMENT
-+This section describes several environment variables that affect how GCC
-+operates. Some of them work by specifying directories or prefixes to use
-+when searching for various kinds of files. Some are used to specify other
-+aspects of the compilation environment.
-+
-+Note that you can also specify places to search using options such as
-+@option{-B}, @option{-I} and @option{-L} (@pxref{Directory Options}). These
-+take precedence over places specified using environment variables, which
-+in turn take precedence over those specified by the configuration of GCC@.
-+@xref{Driver,, Controlling the Compilation Driver @file{gcc}, gccint,
-+GNU Compiler Collection (GCC) Internals}.
-+
-+@table @env
-+@item LANG
-+@itemx LC_CTYPE
-+@c @itemx LC_COLLATE
-+@itemx LC_MESSAGES
-+@c @itemx LC_MONETARY
-+@c @itemx LC_NUMERIC
-+@c @itemx LC_TIME
-+@itemx LC_ALL
-+@findex LANG
-+@findex LC_CTYPE
-+@c @findex LC_COLLATE
-+@findex LC_MESSAGES
-+@c @findex LC_MONETARY
-+@c @findex LC_NUMERIC
-+@c @findex LC_TIME
-+@findex LC_ALL
-+@cindex locale
-+These environment variables control the way that GCC uses
-+localization information that allow GCC to work with different
-+national conventions. GCC inspects the locale categories
-+@env{LC_CTYPE} and @env{LC_MESSAGES} if it has been configured to do
-+so. These locale categories can be set to any value supported by your
-+installation. A typical value is @samp{en_GB.UTF-8} for English in the United
-+Kingdom encoded in UTF-8.
-+
-+The @env{LC_CTYPE} environment variable specifies character
-+classification. GCC uses it to determine the character boundaries in
-+a string; this is needed for some multibyte encodings that contain quote
-+and escape characters that would otherwise be interpreted as a string
-+end or escape.
-+
-+The @env{LC_MESSAGES} environment variable specifies the language to
-+use in diagnostic messages.
-+
-+If the @env{LC_ALL} environment variable is set, it overrides the value
-+of @env{LC_CTYPE} and @env{LC_MESSAGES}; otherwise, @env{LC_CTYPE}
-+and @env{LC_MESSAGES} default to the value of the @env{LANG}
-+environment variable. If none of these variables are set, GCC
-+defaults to traditional C English behavior.
-+
-+@item TMPDIR
-+@findex TMPDIR
-+If @env{TMPDIR} is set, it specifies the directory to use for temporary
-+files. GCC uses temporary files to hold the output of one stage of
-+compilation which is to be used as input to the next stage: for example,
-+the output of the preprocessor, which is the input to the compiler
-+proper.
-+
-+@item GCC_EXEC_PREFIX
-+@findex GCC_EXEC_PREFIX
-+If @env{GCC_EXEC_PREFIX} is set, it specifies a prefix to use in the
-+names of the subprograms executed by the compiler. No slash is added
-+when this prefix is combined with the name of a subprogram, but you can
-+specify a prefix that ends with a slash if you wish.
-+
-+If @env{GCC_EXEC_PREFIX} is not set, GCC will attempt to figure out
-+an appropriate prefix to use based on the pathname it was invoked with.
-+
-+If GCC cannot find the subprogram using the specified prefix, it
-+tries looking in the usual places for the subprogram.
-+
-+The default value of @env{GCC_EXEC_PREFIX} is
-+@file{@var{prefix}/lib/gcc/} where @var{prefix} is the prefix to
-+the installed compiler. In many cases @var{prefix} is the value
-+of @code{prefix} when you ran the @file{configure} script.
-+
-+Other prefixes specified with @option{-B} take precedence over this prefix.
-+
-+This prefix is also used for finding files such as @file{crt0.o} that are
-+used for linking.
-+
-+In addition, the prefix is used in an unusual way in finding the
-+directories to search for header files. For each of the standard
-+directories whose name normally begins with @samp{/usr/local/lib/gcc}
-+(more precisely, with the value of @env{GCC_INCLUDE_DIR}), GCC tries
-+replacing that beginning with the specified prefix to produce an
-+alternate directory name. Thus, with @option{-Bfoo/}, GCC will search
-+@file{foo/bar} where it would normally search @file{/usr/local/lib/bar}.
-+These alternate directories are searched first; the standard directories
-+come next. If a standard directory begins with the configured
-+@var{prefix} then the value of @var{prefix} is replaced by
-+@env{GCC_EXEC_PREFIX} when looking for header files.
-+
-+@item COMPILER_PATH
-+@findex COMPILER_PATH
-+The value of @env{COMPILER_PATH} is a colon-separated list of
-+directories, much like @env{PATH}. GCC tries the directories thus
-+specified when searching for subprograms, if it can't find the
-+subprograms using @env{GCC_EXEC_PREFIX}.
-+
-+@item LIBRARY_PATH
-+@findex LIBRARY_PATH
-+The value of @env{LIBRARY_PATH} is a colon-separated list of
-+directories, much like @env{PATH}. When configured as a native compiler,
-+GCC tries the directories thus specified when searching for special
-+linker files, if it can't find them using @env{GCC_EXEC_PREFIX}. Linking
-+using GCC also uses these directories when searching for ordinary
-+libraries for the @option{-l} option (but directories specified with
-+@option{-L} come first).
-+
-+@item LANG
-+@findex LANG
-+@cindex locale definition
-+This variable is used to pass locale information to the compiler. One way in
-+which this information is used is to determine the character set to be used
-+when character literals, string literals and comments are parsed in C and C++.
-+When the compiler is configured to allow multibyte characters,
-+the following values for @env{LANG} are recognized:
-+
-+@table @samp
-+@item C-JIS
-+Recognize JIS characters.
-+@item C-SJIS
-+Recognize SJIS characters.
-+@item C-EUCJP
-+Recognize EUCJP characters.
-+@end table
-+
-+If @env{LANG} is not defined, or if it has some other value, then the
-+compiler will use mblen and mbtowc as defined by the default locale to
-+recognize and translate multibyte characters.
-+@end table
-+
-+@noindent
-+Some additional environments variables affect the behavior of the
-+preprocessor.
-+
-+@include cppenv.texi
-+
-+@c man end
-+
-+@node Precompiled Headers
-+@section Using Precompiled Headers
-+@cindex precompiled headers
-+@cindex speed of compilation
-+
-+Often large projects have many header files that are included in every
-+source file. The time the compiler takes to process these header files
-+over and over again can account for nearly all of the time required to
-+build the project. To make builds faster, GCC allows users to
-+`precompile' a header file; then, if builds can use the precompiled
-+header file they will be much faster.
-+
-+To create a precompiled header file, simply compile it as you would any
-+other file, if necessary using the @option{-x} option to make the driver
-+treat it as a C or C++ header file. You will probably want to use a
-+tool like @command{make} to keep the precompiled header up-to-date when
-+the headers it contains change.
-+
-+A precompiled header file will be searched for when @code{#include} is
-+seen in the compilation. As it searches for the included file
-+(@pxref{Search Path,,Search Path,cpp,The C Preprocessor}) the
-+compiler looks for a precompiled header in each directory just before it
-+looks for the include file in that directory. The name searched for is
-+the name specified in the @code{#include} with @samp{.gch} appended. If
-+the precompiled header file can't be used, it is ignored.
-+
-+For instance, if you have @code{#include "all.h"}, and you have
-+@file{all.h.gch} in the same directory as @file{all.h}, then the
-+precompiled header file will be used if possible, and the original
-+header will be used otherwise.
-+
-+Alternatively, you might decide to put the precompiled header file in a
-+directory and use @option{-I} to ensure that directory is searched
-+before (or instead of) the directory containing the original header.
-+Then, if you want to check that the precompiled header file is always
-+used, you can put a file of the same name as the original header in this
-+directory containing an @code{#error} command.
-+
-+This also works with @option{-include}. So yet another way to use
-+precompiled headers, good for projects not designed with precompiled
-+header files in mind, is to simply take most of the header files used by
-+a project, include them from another header file, precompile that header
-+file, and @option{-include} the precompiled header. If the header files
-+have guards against multiple inclusion, they will be skipped because
-+they've already been included (in the precompiled header).
-+
-+If you need to precompile the same header file for different
-+languages, targets, or compiler options, you can instead make a
-+@emph{directory} named like @file{all.h.gch}, and put each precompiled
-+header in the directory, perhaps using @option{-o}. It doesn't matter
-+what you call the files in the directory, every precompiled header in
-+the directory will be considered. The first precompiled header
-+encountered in the directory that is valid for this compilation will
-+be used; they're searched in no particular order.
-+
-+There are many other possibilities, limited only by your imagination,
-+good sense, and the constraints of your build system.
-+
-+A precompiled header file can be used only when these conditions apply:
-+
-+@itemize
-+@item
-+Only one precompiled header can be used in a particular compilation.
-+
-+@item
-+A precompiled header can't be used once the first C token is seen. You
-+can have preprocessor directives before a precompiled header; you can
-+even include a precompiled header from inside another header, so long as
-+there are no C tokens before the @code{#include}.
-+
-+@item
-+The precompiled header file must be produced for the same language as
-+the current compilation. You can't use a C precompiled header for a C++
-+compilation.
-+
-+@item
-+The precompiled header file must have been produced by the same compiler
-+binary as the current compilation is using.
-+
-+@item
-+Any macros defined before the precompiled header is included must
-+either be defined in the same way as when the precompiled header was
-+generated, or must not affect the precompiled header, which usually
-+means that they don't appear in the precompiled header at all.
-+
-+The @option{-D} option is one way to define a macro before a
-+precompiled header is included; using a @code{#define} can also do it.
-+There are also some options that define macros implicitly, like
-+@option{-O} and @option{-Wdeprecated}; the same rule applies to macros
-+defined this way.
-+
-+@item If debugging information is output when using the precompiled
-+header, using @option{-g} or similar, the same kind of debugging information
-+must have been output when building the precompiled header. However,
-+a precompiled header built using @option{-g} can be used in a compilation
-+when no debugging information is being output.
-+
-+@item The same @option{-m} options must generally be used when building
-+and using the precompiled header. @xref{Submodel Options},
-+for any cases where this rule is relaxed.
-+
-+@item Each of the following options must be the same when building and using
-+the precompiled header:
-+
-+@gccoptlist{-fexceptions}
-+
-+@item
-+Some other command-line options starting with @option{-f},
-+@option{-p}, or @option{-O} must be defined in the same way as when
-+the precompiled header was generated. At present, it's not clear
-+which options are safe to change and which are not; the safest choice
-+is to use exactly the same options when generating and using the
-+precompiled header. The following are known to be safe:
-+
-+@gccoptlist{-fmessage-length= -fpreprocessed -fsched-interblock @gol
-+-fsched-spec -fsched-spec-load -fsched-spec-load-dangerous @gol
-+-fsched-verbose=<number> -fschedule-insns -fvisibility= @gol
-+-pedantic-errors}
-+
-+@end itemize
-+
-+For all of these except the last, the compiler will automatically
-+ignore the precompiled header if the conditions aren't met. If you
-+find an option combination that doesn't work and doesn't cause the
-+precompiled header to be ignored, please consider filing a bug report,
-+see @ref{Bugs}.
-+
-+If you do use differing options when generating and using the
-+precompiled header, the actual behavior will be a mixture of the
-+behavior for the options. For instance, if you use @option{-g} to
-+generate the precompiled header but not when using it, you may or may
-+not get debugging information for routines in the precompiled header.
-+
-+@node Running Protoize
-+@section Running Protoize
-+
-+The program @code{protoize} is an optional part of GCC@. You can use
-+it to add prototypes to a program, thus converting the program to ISO
-+C in one respect. The companion program @code{unprotoize} does the
-+reverse: it removes argument types from any prototypes that are found.
-+
-+When you run these programs, you must specify a set of source files as
-+command line arguments. The conversion programs start out by compiling
-+these files to see what functions they define. The information gathered
-+about a file @var{foo} is saved in a file named @file{@var{foo}.X}.
-+
-+After scanning comes actual conversion. The specified files are all
-+eligible to be converted; any files they include (whether sources or
-+just headers) are eligible as well.
-+
-+But not all the eligible files are converted. By default,
-+@code{protoize} and @code{unprotoize} convert only source and header
-+files in the current directory. You can specify additional directories
-+whose files should be converted with the @option{-d @var{directory}}
-+option. You can also specify particular files to exclude with the
-+@option{-x @var{file}} option. A file is converted if it is eligible, its
-+directory name matches one of the specified directory names, and its
-+name within the directory has not been excluded.
-+
-+Basic conversion with @code{protoize} consists of rewriting most
-+function definitions and function declarations to specify the types of
-+the arguments. The only ones not rewritten are those for varargs
-+functions.
-+
-+@code{protoize} optionally inserts prototype declarations at the
-+beginning of the source file, to make them available for any calls that
-+precede the function's definition. Or it can insert prototype
-+declarations with block scope in the blocks where undeclared functions
-+are called.
-+
-+Basic conversion with @code{unprotoize} consists of rewriting most
-+function declarations to remove any argument types, and rewriting
-+function definitions to the old-style pre-ISO form.
-+
-+Both conversion programs print a warning for any function declaration or
-+definition that they can't convert. You can suppress these warnings
-+with @option{-q}.
-+
-+The output from @code{protoize} or @code{unprotoize} replaces the
-+original source file. The original file is renamed to a name ending
-+with @samp{.save} (for DOS, the saved filename ends in @samp{.sav}
-+without the original @samp{.c} suffix). If the @samp{.save} (@samp{.sav}
-+for DOS) file already exists, then the source file is simply discarded.
-+
-+@code{protoize} and @code{unprotoize} both depend on GCC itself to
-+scan the program and collect information about the functions it uses.
-+So neither of these programs will work until GCC is installed.
-+
-+Here is a table of the options you can use with @code{protoize} and
-+@code{unprotoize}. Each option works with both programs unless
-+otherwise stated.
-+
-+@table @code
-+@item -B @var{directory}
-+Look for the file @file{SYSCALLS.c.X} in @var{directory}, instead of the
-+usual directory (normally @file{/usr/local/lib}). This file contains
-+prototype information about standard system functions. This option
-+applies only to @code{protoize}.
-+
-+@item -c @var{compilation-options}
-+Use @var{compilation-options} as the options when running @command{gcc} to
-+produce the @samp{.X} files. The special option @option{-aux-info} is
-+always passed in addition, to tell @command{gcc} to write a @samp{.X} file.
-+
-+Note that the compilation options must be given as a single argument to
-+@code{protoize} or @code{unprotoize}. If you want to specify several
-+@command{gcc} options, you must quote the entire set of compilation options
-+to make them a single word in the shell.
-+
-+There are certain @command{gcc} arguments that you cannot use, because they
-+would produce the wrong kind of output. These include @option{-g},
-+@option{-O}, @option{-c}, @option{-S}, and @option{-o} If you include these in
-+the @var{compilation-options}, they are ignored.
-+
-+@item -C
-+Rename files to end in @samp{.C} (@samp{.cc} for DOS-based file
-+systems) instead of @samp{.c}. This is convenient if you are converting
-+a C program to C++. This option applies only to @code{protoize}.
-+
-+@item -g
-+Add explicit global declarations. This means inserting explicit
-+declarations at the beginning of each source file for each function
-+that is called in the file and was not declared. These declarations
-+precede the first function definition that contains a call to an
-+undeclared function. This option applies only to @code{protoize}.
-+
-+@item -i @var{string}
-+Indent old-style parameter declarations with the string @var{string}.
-+This option applies only to @code{protoize}.
-+
-+@code{unprotoize} converts prototyped function definitions to old-style
-+function definitions, where the arguments are declared between the
-+argument list and the initial @samp{@{}. By default, @code{unprotoize}
-+uses five spaces as the indentation. If you want to indent with just
-+one space instead, use @option{-i " "}.
-+
-+@item -k
-+Keep the @samp{.X} files. Normally, they are deleted after conversion
-+is finished.
-+
-+@item -l
-+Add explicit local declarations. @code{protoize} with @option{-l} inserts
-+a prototype declaration for each function in each block which calls the
-+function without any declaration. This option applies only to
-+@code{protoize}.
-+
-+@item -n
-+Make no real changes. This mode just prints information about the conversions
-+that would have been done without @option{-n}.
-+
-+@item -N
-+Make no @samp{.save} files. The original files are simply deleted.
-+Use this option with caution.
-+
-+@item -p @var{program}
-+Use the program @var{program} as the compiler. Normally, the name
-+@file{gcc} is used.
-+
-+@item -q
-+Work quietly. Most warnings are suppressed.
-+
-+@item -v
-+Print the version number, just like @option{-v} for @command{gcc}.
-+@end table
-+
-+If you need special compiler options to compile one of your program's
-+source files, then you should generate that file's @samp{.X} file
-+specially, by running @command{gcc} on that source file with the
-+appropriate options and the option @option{-aux-info}. Then run
-+@code{protoize} on the entire set of files. @code{protoize} will use
-+the existing @samp{.X} file because it is newer than the source file.
-+For example:
-+
-+@smallexample
-+gcc -Dfoo=bar file1.c -aux-info file1.X
-+protoize *.c
-+@end smallexample
-+
-+@noindent
-+You need to include the special files along with the rest in the
-+@code{protoize} command, even though their @samp{.X} files already
-+exist, because otherwise they won't get converted.
-+
-+@xref{Protoize Caveats}, for more information on how to use
-+@code{protoize} successfully.
diff -Nur gcc-4.4.6.orig/gcc/doc/md.texi gcc-4.4.6/gcc/doc/md.texi
--- gcc-4.4.6.orig/gcc/doc/md.texi 2009-05-07 10:14:55.000000000 +0200
-+++ gcc-4.4.6/gcc/doc/md.texi 2011-08-27 19:45:43.849240766 +0200
++++ gcc-4.4.6/gcc/doc/md.texi 2011-10-22 19:23:08.548581303 +0200
@@ -4,6 +4,7 @@
@c This is part of the GCC manual.
@c For copying conditions, see the file gcc.texi.
@@ -41996,7 +25338,7 @@ diff -Nur gcc-4.4.6.orig/gcc/doc/md.texi gcc-4.4.6/gcc/doc/md.texi
@item l
diff -Nur gcc-4.4.6.orig/gcc/expmed.c gcc-4.4.6/gcc/expmed.c
--- gcc-4.4.6.orig/gcc/expmed.c 2010-08-06 09:52:04.000000000 +0200
-+++ gcc-4.4.6/gcc/expmed.c 2011-08-27 19:45:43.869240328 +0200
++++ gcc-4.4.6/gcc/expmed.c 2011-10-22 19:23:08.548581303 +0200
@@ -472,9 +472,9 @@
? ((GET_MODE_SIZE (fieldmode) >= UNITS_PER_WORD
|| GET_MODE_SIZE (GET_MODE (op0)) == GET_MODE_SIZE (fieldmode))
@@ -42011,7 +25353,7 @@ diff -Nur gcc-4.4.6.orig/gcc/expmed.c gcc-4.4.6/gcc/expmed.c
op0 = adjust_address (op0, fieldmode, offset);
diff -Nur gcc-4.4.6.orig/gcc/expr.c gcc-4.4.6/gcc/expr.c
--- gcc-4.4.6.orig/gcc/expr.c 2011-01-16 23:56:10.000000000 +0100
-+++ gcc-4.4.6/gcc/expr.c 2011-08-27 19:45:43.937982102 +0200
++++ gcc-4.4.6/gcc/expr.c 2011-10-22 19:23:08.552581303 +0200
@@ -52,6 +52,7 @@
#include "tree-flow.h"
#include "target.h"
@@ -42087,7 +25429,7 @@ diff -Nur gcc-4.4.6.orig/gcc/expr.c gcc-4.4.6/gcc/expr.c
&& GET_MODE_CLASS (mode) != MODE_COMPLEX_INT
diff -Nur gcc-4.4.6.orig/gcc/function.c gcc-4.4.6/gcc/function.c
--- gcc-4.4.6.orig/gcc/function.c 2010-08-16 22:24:54.000000000 +0200
-+++ gcc-4.4.6/gcc/function.c 2011-08-27 19:45:43.947990930 +0200
++++ gcc-4.4.6/gcc/function.c 2011-10-22 19:23:08.552581303 +0200
@@ -2810,7 +2810,11 @@
assign_parm_remove_parallels (data);
@@ -42103,7 +25445,7 @@ diff -Nur gcc-4.4.6.orig/gcc/function.c gcc-4.4.6/gcc/function.c
int save_tree_used;
diff -Nur gcc-4.4.6.orig/gcc/genemit.c gcc-4.4.6/gcc/genemit.c
--- gcc-4.4.6.orig/gcc/genemit.c 2009-02-20 16:20:38.000000000 +0100
-+++ gcc-4.4.6/gcc/genemit.c 2011-08-27 19:45:44.027983016 +0200
++++ gcc-4.4.6/gcc/genemit.c 2011-10-22 19:23:08.552581303 +0200
@@ -121,6 +121,24 @@
}
@@ -42194,7 +25536,7 @@ diff -Nur gcc-4.4.6.orig/gcc/genemit.c gcc-4.4.6/gcc/genemit.c
/* The fourth operand of DEFINE_EXPAND is some code to be executed
diff -Nur gcc-4.4.6.orig/gcc/genflags.c gcc-4.4.6/gcc/genflags.c
--- gcc-4.4.6.orig/gcc/genflags.c 2007-07-26 10:37:01.000000000 +0200
-+++ gcc-4.4.6/gcc/genflags.c 2011-08-27 19:45:44.067990456 +0200
++++ gcc-4.4.6/gcc/genflags.c 2011-10-22 19:23:08.552581303 +0200
@@ -127,7 +127,6 @@
gen_proto (rtx insn)
{
@@ -42233,7 +25575,7 @@ diff -Nur gcc-4.4.6.orig/gcc/genflags.c gcc-4.4.6/gcc/genflags.c
puts ("{\n return 0;\n}");
diff -Nur gcc-4.4.6.orig/gcc/genoutput.c gcc-4.4.6/gcc/genoutput.c
--- gcc-4.4.6.orig/gcc/genoutput.c 2009-02-20 16:20:38.000000000 +0100
-+++ gcc-4.4.6/gcc/genoutput.c 2011-08-27 19:45:44.107989452 +0200
++++ gcc-4.4.6/gcc/genoutput.c 2011-10-22 19:23:08.552581303 +0200
@@ -386,7 +386,7 @@
}
@@ -42245,7 +25587,7 @@ diff -Nur gcc-4.4.6.orig/gcc/genoutput.c gcc-4.4.6/gcc/genoutput.c
diff -Nur gcc-4.4.6.orig/gcc/ifcvt.c gcc-4.4.6/gcc/ifcvt.c
--- gcc-4.4.6.orig/gcc/ifcvt.c 2010-01-07 15:59:59.000000000 +0100
-+++ gcc-4.4.6/gcc/ifcvt.c 2011-08-27 19:45:44.167989467 +0200
++++ gcc-4.4.6/gcc/ifcvt.c 2011-10-22 19:23:08.552581303 +0200
@@ -84,7 +84,7 @@
static int num_updated_if_blocks;
@@ -42341,7 +25683,7 @@ diff -Nur gcc-4.4.6.orig/gcc/ifcvt.c gcc-4.4.6/gcc/ifcvt.c
}
diff -Nur gcc-4.4.6.orig/gcc/longlong.h gcc-4.4.6/gcc/longlong.h
--- gcc-4.4.6.orig/gcc/longlong.h 2009-08-12 00:36:56.000000000 +0200
-+++ gcc-4.4.6/gcc/longlong.h 2011-08-27 19:45:44.227991100 +0200
++++ gcc-4.4.6/gcc/longlong.h 2011-10-22 19:23:08.552581303 +0200
@@ -250,6 +250,41 @@
#define COUNT_LEADING_ZEROS_0 32
#endif
@@ -42386,7 +25728,7 @@ diff -Nur gcc-4.4.6.orig/gcc/longlong.h gcc-4.4.6/gcc/longlong.h
#if __CRIS_arch_version >= 8
diff -Nur gcc-4.4.6.orig/gcc/optabs.h gcc-4.4.6/gcc/optabs.h
--- gcc-4.4.6.orig/gcc/optabs.h 2008-08-07 09:35:51.000000000 +0200
-+++ gcc-4.4.6/gcc/optabs.h 2011-08-27 19:45:44.277990875 +0200
++++ gcc-4.4.6/gcc/optabs.h 2011-10-22 19:23:08.556581301 +0200
@@ -603,7 +603,7 @@
extern optab code_to_optab[NUM_RTX_CODE + 1];
@@ -42398,7 +25740,7 @@ diff -Nur gcc-4.4.6.orig/gcc/optabs.h gcc-4.4.6/gcc/optabs.h
gives the gen_function to make a branch to test that condition. */
diff -Nur gcc-4.4.6.orig/gcc/regrename.c gcc-4.4.6/gcc/regrename.c
--- gcc-4.4.6.orig/gcc/regrename.c 2009-02-20 16:20:38.000000000 +0100
-+++ gcc-4.4.6/gcc/regrename.c 2011-08-27 19:45:44.309657742 +0200
++++ gcc-4.4.6/gcc/regrename.c 2011-10-22 19:23:08.556581301 +0200
@@ -1582,6 +1582,9 @@
bool changed = false;
rtx insn;
@@ -42470,7 +25812,7 @@ diff -Nur gcc-4.4.6.orig/gcc/regrename.c gcc-4.4.6/gcc/regrename.c
if (recog_op_alt[i][alt].earlyclobber)
diff -Nur gcc-4.4.6.orig/gcc/sched-deps.c gcc-4.4.6/gcc/sched-deps.c
--- gcc-4.4.6.orig/gcc/sched-deps.c 2010-08-24 10:53:11.000000000 +0200
-+++ gcc-4.4.6/gcc/sched-deps.c 2011-08-27 19:45:44.380490459 +0200
++++ gcc-4.4.6/gcc/sched-deps.c 2011-10-22 19:23:08.556581301 +0200
@@ -1473,7 +1473,14 @@
prev_nonnote = prev_nonnote_insn (insn);
@@ -42519,7 +25861,7 @@ diff -Nur gcc-4.4.6.orig/gcc/sched-deps.c gcc-4.4.6/gcc/sched-deps.c
x = COND_EXEC_CODE (x);
diff -Nur gcc-4.4.6.orig/gcc/testsuite/gcc.dg/sibcall-3.c gcc-4.4.6/gcc/testsuite/gcc.dg/sibcall-3.c
--- gcc-4.4.6.orig/gcc/testsuite/gcc.dg/sibcall-3.c 2009-01-08 18:56:52.000000000 +0100
-+++ gcc-4.4.6/gcc/testsuite/gcc.dg/sibcall-3.c 2011-08-27 19:45:44.447989503 +0200
++++ gcc-4.4.6/gcc/testsuite/gcc.dg/sibcall-3.c 2011-10-22 19:23:08.556581301 +0200
@@ -5,7 +5,7 @@
Copyright (C) 2002 Free Software Foundation Inc.
Contributed by Hans-Peter Nilsson <hp@bitrange.com> */
@@ -42531,7 +25873,7 @@ diff -Nur gcc-4.4.6.orig/gcc/testsuite/gcc.dg/sibcall-3.c gcc-4.4.6/gcc/testsuit
/* { dg-options "-O2 -foptimize-sibling-calls" } */
diff -Nur gcc-4.4.6.orig/gcc/testsuite/gcc.dg/sibcall-4.c gcc-4.4.6/gcc/testsuite/gcc.dg/sibcall-4.c
--- gcc-4.4.6.orig/gcc/testsuite/gcc.dg/sibcall-4.c 2009-01-08 18:56:52.000000000 +0100
-+++ gcc-4.4.6/gcc/testsuite/gcc.dg/sibcall-4.c 2011-08-27 19:45:44.499241252 +0200
++++ gcc-4.4.6/gcc/testsuite/gcc.dg/sibcall-4.c 2011-10-22 19:23:08.556581301 +0200
@@ -5,7 +5,7 @@
Copyright (C) 2002 Free Software Foundation Inc.
Contributed by Hans-Peter Nilsson <hp@bitrange.com> */
@@ -42543,7 +25885,7 @@ diff -Nur gcc-4.4.6.orig/gcc/testsuite/gcc.dg/sibcall-4.c gcc-4.4.6/gcc/testsuit
/* { dg-options "-O2 -foptimize-sibling-calls" } */
diff -Nur gcc-4.4.6.orig/gcc/testsuite/gcc.dg/trampoline-1.c gcc-4.4.6/gcc/testsuite/gcc.dg/trampoline-1.c
--- gcc-4.4.6.orig/gcc/testsuite/gcc.dg/trampoline-1.c 2008-05-12 23:52:38.000000000 +0200
-+++ gcc-4.4.6/gcc/testsuite/gcc.dg/trampoline-1.c 2011-08-27 19:45:44.567990409 +0200
++++ gcc-4.4.6/gcc/testsuite/gcc.dg/trampoline-1.c 2011-10-22 19:23:08.556581301 +0200
@@ -47,6 +47,8 @@
int main (void)
@@ -42555,7 +25897,7 @@ diff -Nur gcc-4.4.6.orig/gcc/testsuite/gcc.dg/trampoline-1.c gcc-4.4.6/gcc/tests
}
diff -Nur gcc-4.4.6.orig/libgcc/config.host gcc-4.4.6/libgcc/config.host
--- gcc-4.4.6.orig/libgcc/config.host 2009-04-17 13:58:41.000000000 +0200
-+++ gcc-4.4.6/libgcc/config.host 2011-08-27 19:45:44.617991228 +0200
++++ gcc-4.4.6/libgcc/config.host 2011-10-22 19:23:08.556581301 +0200
@@ -218,6 +218,13 @@
;;
arm-*-pe*)
@@ -42570,9 +25912,20 @@ diff -Nur gcc-4.4.6.orig/libgcc/config.host gcc-4.4.6/libgcc/config.host
avr-*-rtems*)
;;
avr-*-*)
+diff -Nur gcc-4.4.6.orig/libstdc++-v3/Makefile.in gcc-4.4.6/libstdc++-v3/Makefile.in
+--- gcc-4.4.6.orig/libstdc++-v3/Makefile.in 2010-04-29 17:03:38.000000000 +0200
++++ gcc-4.4.6/libstdc++-v3/Makefile.in 2011-10-22 19:23:08.556581301 +0200
+@@ -36,6 +36,7 @@
+ build_triplet = @build@
+ host_triplet = @host@
+ target_triplet = @target@
++LIBOBJDIR =
+ DIST_COMMON = $(top_srcdir)/fragment.am $(srcdir)/../config.guess \
+ $(srcdir)/../config.sub README ChangeLog $(srcdir)/Makefile.in \
+ $(srcdir)/Makefile.am $(top_srcdir)/configure \
diff -Nur gcc-4.4.6.orig/libstdc++-v3/config/os/gnu-linux/ctype_base.h gcc-4.4.6/libstdc++-v3/config/os/gnu-linux/ctype_base.h
--- gcc-4.4.6.orig/libstdc++-v3/config/os/gnu-linux/ctype_base.h 2009-04-10 01:23:07.000000000 +0200
-+++ gcc-4.4.6/libstdc++-v3/config/os/gnu-linux/ctype_base.h 2011-08-27 19:45:44.687989554 +0200
++++ gcc-4.4.6/libstdc++-v3/config/os/gnu-linux/ctype_base.h 2011-10-22 19:23:08.556581301 +0200
@@ -26,6 +26,8 @@
//
// ISO C++ 14882: 22.1 Locales
@@ -42596,7 +25949,7 @@ diff -Nur gcc-4.4.6.orig/libstdc++-v3/config/os/gnu-linux/ctype_base.h gcc-4.4.6
// on the mask type. Because of this, we don't use an enum.
diff -Nur gcc-4.4.6.orig/libstdc++-v3/include/Makefile.in gcc-4.4.6/libstdc++-v3/include/Makefile.in
--- gcc-4.4.6.orig/libstdc++-v3/include/Makefile.in 2009-05-13 02:24:16.000000000 +0200
-+++ gcc-4.4.6/libstdc++-v3/include/Makefile.in 2011-08-27 19:45:44.737991067 +0200
++++ gcc-4.4.6/libstdc++-v3/include/Makefile.in 2011-10-22 19:23:08.556581301 +0200
@@ -36,6 +36,7 @@
build_triplet = @build@
host_triplet = @host@
@@ -42607,7 +25960,7 @@ diff -Nur gcc-4.4.6.orig/libstdc++-v3/include/Makefile.in gcc-4.4.6/libstdc++-v3
subdir = include
diff -Nur gcc-4.4.6.orig/libstdc++-v3/libsupc++/Makefile.in gcc-4.4.6/libstdc++-v3/libsupc++/Makefile.in
--- gcc-4.4.6.orig/libstdc++-v3/libsupc++/Makefile.in 2009-01-15 21:02:11.000000000 +0100
-+++ gcc-4.4.6/libstdc++-v3/libsupc++/Makefile.in 2011-08-27 19:45:44.777991092 +0200
++++ gcc-4.4.6/libstdc++-v3/libsupc++/Makefile.in 2011-10-22 19:23:08.556581301 +0200
@@ -38,6 +38,7 @@
build_triplet = @build@
host_triplet = @host@
@@ -42616,20 +25969,9 @@ diff -Nur gcc-4.4.6.orig/libstdc++-v3/libsupc++/Makefile.in gcc-4.4.6/libstdc++-
DIST_COMMON = $(glibcxxinstall_HEADERS) $(srcdir)/Makefile.am \
$(srcdir)/Makefile.in $(top_srcdir)/fragment.am
subdir = libsupc++
-diff -Nur gcc-4.4.6.orig/libstdc++-v3/Makefile.in gcc-4.4.6/libstdc++-v3/Makefile.in
---- gcc-4.4.6.orig/libstdc++-v3/Makefile.in 2010-04-29 17:03:38.000000000 +0200
-+++ gcc-4.4.6/libstdc++-v3/Makefile.in 2011-08-27 19:45:44.850357194 +0200
-@@ -36,6 +36,7 @@
- build_triplet = @build@
- host_triplet = @host@
- target_triplet = @target@
-+LIBOBJDIR =
- DIST_COMMON = $(top_srcdir)/fragment.am $(srcdir)/../config.guess \
- $(srcdir)/../config.sub README ChangeLog $(srcdir)/Makefile.in \
- $(srcdir)/Makefile.am $(top_srcdir)/configure \
diff -Nur gcc-4.4.6.orig/libstdc++-v3/po/Makefile.in gcc-4.4.6/libstdc++-v3/po/Makefile.in
--- gcc-4.4.6.orig/libstdc++-v3/po/Makefile.in 2009-01-15 21:02:11.000000000 +0100
-+++ gcc-4.4.6/libstdc++-v3/po/Makefile.in 2011-08-27 19:45:44.900490527 +0200
++++ gcc-4.4.6/libstdc++-v3/po/Makefile.in 2011-10-22 19:23:08.556581301 +0200
@@ -36,6 +36,7 @@
build_triplet = @build@
host_triplet = @host@
@@ -42640,7 +25982,7 @@ diff -Nur gcc-4.4.6.orig/libstdc++-v3/po/Makefile.in gcc-4.4.6/libstdc++-v3/po/M
subdir = po
diff -Nur gcc-4.4.6.orig/libstdc++-v3/src/Makefile.in gcc-4.4.6/libstdc++-v3/src/Makefile.in
--- gcc-4.4.6.orig/libstdc++-v3/src/Makefile.in 2009-08-26 21:04:11.000000000 +0200
-+++ gcc-4.4.6/libstdc++-v3/src/Makefile.in 2011-08-27 19:45:44.958377128 +0200
++++ gcc-4.4.6/libstdc++-v3/src/Makefile.in 2011-10-22 19:23:08.556581301 +0200
@@ -37,6 +37,7 @@
build_triplet = @build@
host_triplet = @host@
generated by cgit v1.2.3 (git 2.25.1) at 2024-04-30 17:08:06 +0000