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diff -Nur gcc-4.9.1.orig/gcc/c-family/c-opts.c gcc-4.9.1/gcc/c-family/c-opts.c
--- gcc-4.9.1.orig/gcc/c-family/c-opts.c 2014-05-06 12:48:08.000000000 +0200
+++ gcc-4.9.1/gcc/c-family/c-opts.c 2014-08-05 15:54:02.000000000 +0200
@@ -105,6 +105,9 @@
/* Whether any standard preincluded header has been preincluded. */
static bool done_preinclude;
+/* Check if a port honours COPTS. */
+static int honour_copts = 0;
+
static void handle_OPT_d (const char *);
static void set_std_cxx98 (int);
static void set_std_cxx11 (int);
@@ -492,6 +495,12 @@
flag_no_builtin = !value;
break;
+ case OPT_fhonour_copts:
+ if (c_language == clk_c) {
+ honour_copts++;
+ }
+ break;
+
case OPT_fconstant_string_class_:
constant_string_class_name = arg;
break;
@@ -1048,6 +1057,47 @@
return false;
}
+ if (c_language == clk_c) {
+ char *ev = getenv ("GCC_HONOUR_COPTS");
+ int evv;
+ if (ev == NULL)
+ evv = -1;
+ else if ((*ev == '0') || (*ev == '\0'))
+ evv = 0;
+ else if (*ev == '1')
+ evv = 1;
+ else if (*ev == '2')
+ evv = 2;
+ else if (*ev == 's')
+ evv = -1;
+ else {
+ warning (0, "unknown GCC_HONOUR_COPTS value, assuming 1");
+ evv = 1; /* maybe depend this on something like MIRBSD_NATIVE? */
+ }
+ if (evv == 1) {
+ if (honour_copts == 0) {
+ error ("someone does not honour COPTS at all in lenient mode");
+ return false;
+ } else if (honour_copts != 1) {
+ warning (0, "someone does not honour COPTS correctly, passed %d times",
+ honour_copts);
+ }
+ } else if (evv == 2) {
+ if (honour_copts == 0) {
+ error ("someone does not honour COPTS at all in strict mode");
+ return false;
+ } else if (honour_copts != 1) {
+ error ("someone does not honour COPTS correctly, passed %d times",
+ honour_copts);
+ return false;
+ }
+ } else if (evv == 0) {
+ if (honour_copts != 1)
+ inform (0, "someone does not honour COPTS correctly, passed %d times",
+ honour_copts);
+ }
+ }
+
return true;
}
diff -Nur gcc-4.9.1.orig/gcc/c-family/c.opt gcc-4.9.1/gcc/c-family/c.opt
--- gcc-4.9.1.orig/gcc/c-family/c.opt 2014-04-03 15:41:55.000000000 +0200
+++ gcc-4.9.1/gcc/c-family/c.opt 2014-08-05 15:54:02.000000000 +0200
@@ -391,6 +391,10 @@
C ObjC C++ ObjC++ Var(warn_float_conversion) LangEnabledBy(C ObjC C++ ObjC++,Wconversion)
Warn for implicit type conversions that cause loss of floating point precision
+Werror-maybe-reset
+C ObjC C++ ObjC++
+; Documented in common.opt
+
Wfloat-equal
C ObjC C++ ObjC++ Var(warn_float_equal) Warning
Warn if testing floating point numbers for equality
@@ -972,6 +976,9 @@
fhonor-std
C++ ObjC++ Ignore Warn(switch %qs is no longer supported)
+fhonour-copts
+C ObjC C++ ObjC++ RejectNegative
+
fhosted
C ObjC
Assume normal C execution environment
diff -Nur gcc-4.9.1.orig/gcc/common.opt gcc-4.9.1/gcc/common.opt
--- gcc-4.9.1.orig/gcc/common.opt 2014-04-07 15:27:39.000000000 +0200
+++ gcc-4.9.1/gcc/common.opt 2014-08-05 15:54:02.000000000 +0200
@@ -549,6 +549,10 @@
Common Joined
Treat specified warning as error
+Werror-maybe-reset
+Common
+If environment variable GCC_NO_WERROR is set, act as -Wno-error
+
Wextra
Common Var(extra_warnings) Warning
Print extra (possibly unwanted) warnings
@@ -1287,6 +1291,9 @@
Common Report Var(flag_guess_branch_prob) Optimization
Enable guessing of branch probabilities
+fhonour-copts
+Common RejectNegative
+
; Nonzero means ignore `#ident' directives. 0 means handle them.
; Generate position-independent code for executables if possible
; On SVR4 targets, it also controls whether or not to emit a
diff -Nur gcc-4.9.1.orig/gcc/doc/cppopts.texi gcc-4.9.1/gcc/doc/cppopts.texi
--- gcc-4.9.1.orig/gcc/doc/cppopts.texi 2014-01-02 23:23:26.000000000 +0100
+++ gcc-4.9.1/gcc/doc/cppopts.texi 2014-08-05 15:54:02.000000000 +0200
@@ -163,6 +163,11 @@
Make all warnings into hard errors. Source code which triggers warnings
will be rejected.
+ at item -Werror-maybe-reset
+ at opindex Werror-maybe-reset
+Act like @samp{-Wno-error} if the @env{GCC_NO_WERROR} environment
+variable is set to anything other than 0 or empty.
+
@item -Wsystem-headers
@opindex Wsystem-headers
Issue warnings for code in system headers. These are normally unhelpful
diff -Nur gcc-4.9.1.orig/gcc/doc/invoke.texi gcc-4.9.1/gcc/doc/invoke.texi
--- gcc-4.9.1.orig/gcc/doc/invoke.texi 2014-05-28 13:37:50.000000000 +0200
+++ gcc-4.9.1/gcc/doc/invoke.texi 2014-08-05 15:54:02.000000000 +0200
@@ -243,7 +243,7 @@
-Wconversion -Wcoverage-mismatch -Wdate-time -Wdelete-incomplete -Wno-cpp @gol
-Wno-deprecated -Wno-deprecated-declarations -Wdisabled-optimization @gol
-Wno-div-by-zero -Wdouble-promotion -Wempty-body -Wenum-compare @gol
--Wno-endif-labels -Werror -Werror=* @gol
+-Wno-endif-labels -Werror -Werror=* -Werror-maybe-reset @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
@@ -5041,6 +5041,22 @@
@option{-Wall} and by @option{-Wpedantic}, which can be disabled with
@option{-Wno-pointer-sign}.
+ at item -Werror-maybe-reset
+ at opindex Werror-maybe-reset
+Act like @samp{-Wno-error} if the @env{GCC_NO_WERROR} environment
+variable is set to anything other than 0 or empty.
+
+ at item -fhonour-copts
+ at opindex fhonour-copts
+If @env{GCC_HONOUR_COPTS} is set to 1, abort if this option is not
+given at least once, and warn if it is given more than once.
+If @env{GCC_HONOUR_COPTS} is set to 2, abort if this option is not
+given exactly once.
+If @env{GCC_HONOUR_COPTS} is set to 0 or unset, warn if this option
+is not given exactly once.
+The warning is quelled if @env{GCC_HONOUR_COPTS} is set to @samp{s}.
+This flag and environment variable only affect the C language.
+
@item -Wstack-protector
@opindex Wstack-protector
@opindex Wno-stack-protector
@@ -7188,7 +7204,7 @@
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}.
+Enabled at levels @option{-O3}.
@item -fsplit-wide-types
@opindex fsplit-wide-types
diff -Nur gcc-4.9.1.orig/gcc/java/jvspec.c gcc-4.9.1/gcc/java/jvspec.c
--- gcc-4.9.1.orig/gcc/java/jvspec.c 2014-01-02 23:23:26.000000000 +0100
+++ gcc-4.9.1/gcc/java/jvspec.c 2014-08-05 15:54:02.000000000 +0200
@@ -626,6 +626,7 @@
class name. Append dummy `.c' that can be stripped by set_input so %b
is correct. */
set_input (concat (main_class_name, "main.c", NULL));
+ putenv ("GCC_HONOUR_COPTS=s"); /* XXX hack! */
err = do_spec (jvgenmain_spec);
if (err == 0)
{
diff -Nur gcc-4.9.1.orig/gcc/opts.c gcc-4.9.1/gcc/opts.c
--- gcc-4.9.1.orig/gcc/opts.c 2014-05-18 00:20:43.000000000 +0200
+++ gcc-4.9.1/gcc/opts.c 2014-08-05 15:54:02.000000000 +0200
@@ -499,6 +499,8 @@
{ OPT_LEVELS_2_PLUS, OPT_fisolate_erroneous_paths_dereference, NULL, 1 },
/* -O3 optimizations. */
+ { OPT_LEVELS_3_PLUS, OPT_fstrict_aliasing, NULL, 1 },
+ { OPT_LEVELS_3_PLUS, OPT_fstrict_overflow, NULL, 1 },
{ OPT_LEVELS_3_PLUS, OPT_ftree_loop_distribute_patterns, NULL, 1 },
{ OPT_LEVELS_3_PLUS, OPT_fpredictive_commoning, NULL, 1 },
/* Inlining of functions reducing size is a good idea with -Os
@@ -1536,6 +1538,17 @@
opts, opts_set, loc, dc);
break;
+ case OPT_Werror_maybe_reset:
+ {
+ char *ev = getenv ("GCC_NO_WERROR");
+ if ((ev != NULL) && (*ev != '0'))
+ warnings_are_errors = 0;
+ }
+ break;
+
+ case OPT_fhonour_copts:
+ break;
+
case OPT_Wlarger_than_:
opts->x_larger_than_size = value;
opts->x_warn_larger_than = value != -1;
|
