# Makefile for uClibc
#
# Copyright (C) 2000-2005 Erik Andersen <andersen@uclibc.org>
#
# Licensed under the LGPL v2.1, see the file COPYING.LIB in this tarball.
#

CFLAGS-ldso := -DNOT_IN_libc -DIS_IN_rtld $(SSP_DISABLE_FLAGS)

# This stuff will not work with -fomit-frame-pointer
CFLAGS-ldso += -fno-omit-frame-pointer

CFLAGS-ldso += -I$(top_builddir)ldso/include -I$(top_builddir)ldso/ldso
CFLAGS-ldso += -DUCLIBC_RUNTIME_PREFIX=\"$(RUNTIME_PREFIX)\" -DUCLIBC_LDSO=\"$(UCLIBC_LDSO)\"

ifeq ($(SUPPORT_LD_DEBUG),y)
CFLAGS-ldso += -D__SUPPORT_LD_DEBUG__
endif

ifeq ($(SUPPORT_LD_DEBUG_EARLY),y)
CFLAGS-ldso += -D__SUPPORT_LD_DEBUG_EARLY__
endif

ifeq ($(DODEBUG),y)
# Not really much point in including debugging info, since gdb
# can't really debug ldso, since gdb requires help from ldso to
# debug things....
CFLAGS-ldso += -Os -g
endif

CFLAGS-ldso/ldso/$(TARGET_ARCH)/ := $(CFLAGS-ldso)

ifneq ($(SUPPORT_LD_DEBUG),y)
LDFLAGS-ld-uClibc.so := $(LDFLAGS)
else
LDFLAGS-ld-uClibc.so := $(LDFLAGS_NOSTRIP) -z defs
endif
LDFLAGS-ld-uClibc.so += -e _start -z now -Bsymbolic --export-dynamic --sort-common --discard-locals --discard-all --no-undefined

ldso_FULL_NAME := ld-uClibc-$(MAJOR_VERSION).$(MINOR_VERSION).$(SUBLEVEL).so

ld-uClibc_DIR := $(top_srcdir)ldso/ldso
ld-uClibc_OUT := $(top_builddir)ldso/ldso

ld-uClibc_CSRC := $(ld-uClibc_DIR)/ldso.c
ld-uClibc_COBJ := $(patsubst $(ld-uClibc_DIR)/%.c,$(ld-uClibc_OUT)/%.o,$(ld-uClibc_CSRC))

ld-uClibc_SSRC := $(wildcard $(ld-uClibc_DIR)/$(TARGET_ARCH)/*.S)
ld-uClibc_SOBJ := $(patsubst $(ld-uClibc_DIR)/$(TARGET_ARCH)/%.S,$(ld-uClibc_OUT)/$(TARGET_ARCH)/%.o,$(ld-uClibc_SSRC))

ld-uClibc_OBJS := $(ld-uClibc_COBJ) $(ld-uClibc_SOBJ)

ld-uClibc-so-y := $(ld-uClibc_OBJS:.o=.os)

LN_HEADERS      := $(patsubst %, $(top_builddir)ldso/include/%, elf.h)
LN_ARCH_HEADERS := $(patsubst %, $(top_builddir)ldso/include/%, dl-startup.h dl-syscalls.h dl-sysdep.h dl-debug.h)
HEADERS         := $(LN_HEADERS) $(LN_ARCH_HEADERS) $(top_builddir)ldso/include/dl-progname.h

#lib-so-y := $(top_builddir)lib/$(patsubst %.$(MAJOR_VERSION),%,$(UCLIBC_LDSO))
ld-uClibc-y := $(top_builddir)lib/$(patsubst %.$(MAJOR_VERSION),%,$(UCLIBC_LDSO))
objclean-y += ld-uClibc_clean
headers-$(HAVE_SHARED) += ldso_headers
headers_clean-y += ldso_headers_clean

$(top_builddir)lib/$(patsubst %.$(MAJOR_VERSION),%,$(UCLIBC_LDSO)): $(ld-uClibc_OUT)/ld-uClibc_so.a headers_root
	$(call link.so,$(ldso_FULL_NAME),$(MAJOR_VERSION))
	#(RM) $@

$(ld-uClibc_OUT)/ld-uClibc_so.a: $(ld-uClibc-so-y)
	$(Q)$(RM) $@
	$(do_strip)
	$(do_ar)

ldso_headers: $(HEADERS)

$(LN_HEADERS):
	$(LN) -sf ../../$(top_srcdir)include/$(notdir $@) $@

$(LN_ARCH_HEADERS):
	$(LN) -sf ../../$(top_srcdir)ldso/ldso/$(TARGET_ARCH)/$(notdir $@) $@

$(top_builddir)ldso/include/dl-progname.h:
	echo '#include "$(TARGET_ARCH)/elfinterp.c"' > $@

ldso_headers_clean:
	$(RM) $(HEADERS)

ld-uClibc_clean:
	$(RM) $(ld-uClibc_OUT)/*.{o,os,a} $(ld-uClibc_OUT)/*/*.{o,os}