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glibc/csu/Makefile
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# Makefile for csu code for GNU C library. | |
# Copyright (C) 1995,96,97,98,99,2000,01,2002 Free Software Foundation, Inc. | |
# This file is part of the GNU C Library. | |
# The GNU C Library is free software; you can redistribute it and/or | |
# modify it under the terms of the GNU Lesser General Public | |
# License as published by the Free Software Foundation; either | |
# version 2.1 of the License, or (at your option) any later version. | |
# The GNU C Library 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 | |
# Lesser General Public License for more details. | |
# You should have received a copy of the GNU Lesser General Public | |
# License along with the GNU C Library; if not, write to the Free | |
# Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA | |
# 02111-1307 USA. | |
# This directory contains the C startup code (that which calls main). This | |
# consists of the startfile, built from start.c and installed as crt0.o | |
# (traditionally) or crt1.o (for ELF). In ELF we also install crti.o and | |
# crtn.o, special "initializer" and "finalizer" files used in the link | |
# to make the .init and .fini sections work right; both these files are | |
# built (in an arcane manner) from initfini.c. | |
subdir := csu | |
routines = init-first libc-start $(libc-init) sysdep version check_fds \ | |
libc-tls | |
aux = errno | |
elide-routines.os = libc-tls | |
csu-dummies = $(filter-out $(start-installed-name),crt1.o Mcrt1.o) | |
extra-objs = start.o gmon-start.o \ | |
$(start-installed-name) g$(start-installed-name) $(csu-dummies) | |
omit-deps = $(patsubst %.o,%,$(start-installed-name) g$(start-installed-name) \ | |
b$(start-installed-name) $(csu-dummies)) | |
install-lib = $(start-installed-name) g$(start-installed-name) $(csu-dummies) | |
distribute = initfini.c gmon-start.c start.c defs.awk munch.awk \ | |
abi-note.S init.c munch-tmpl.c | |
generated = version-info.h | |
before-compile = $(objpfx)version-info.h | |
all: # Make this the default target; it will be defined in Rules. | |
include ../Makeconfig | |
ifeq (yes,$(build-bounded)) | |
extra-objs += b$(start-installed-name) | |
install-lib += b$(start-installed-name) | |
endif | |
ifneq ($(start-installed-name),$(static-start-installed-name)) | |
extra-objs += $(static-start-installed-name) g$(static-start-installed-name) | |
omit-deps += $(patsubst %.o,%,$(static-start-installed-name) \ | |
g$(static-start-installed-name)) | |
install-lib += $(static-start-installed-name) g$(static-start-installed-name) | |
endif | |
ifeq (yes,$(elf)) | |
before-compile += $(objpfx)abi-tag.h | |
generated += abi-tag.h | |
endif | |
ifneq (yes,$(gnu-ld)) | |
libc-init = munch-init | |
$(objpfx)munch-init.c: munch.awk munch-tmpl.c $(+subdir_inits) | |
$(AWK) -f $< subdirs='$(+init_subdirs)' $(word 2,$^) > $@-t | |
mv -f $@-t $@ | |
generated += munch-init.c | |
# All initialization source files. | |
+subdir_inits := $(wildcard $(foreach dir,$(subdirs),$(dir)/init-$(dir).c)) | |
# All subdirectories containing initialization source files. | |
+init_subdirs := $(patsubst %/,%,$(dir $(+subdir_inits))) | |
endif | |
ifeq ($(have-initfini),yes) | |
CPPFLAGS += -DHAVE_INITFINI | |
# These are the special initializer/finalizer files. They are always the | |
# first and last file in the link. crti.o ... crtn.o define the global | |
# "functions" _init and _fini to run the .init and .fini sections. | |
crtstuff = crti crtn | |
install-lib += $(crtstuff:=.o) | |
extra-objs += $(crtstuff:=.o) | |
generated += $(crtstuff:=.S) initfini.s defs.h | |
omit-deps += $(crtstuff) | |
# Special rules for the building of crti.o and crtn.o | |
$(objpfx)crt%.o: $(objpfx)crt%.S $(objpfx)defs.h | |
$(compile.S) -g0 $(ASFLAGS-.os) -o $@ | |
CFLAGS-initfini.s = -g0 -fPIC -fno-inline-functions | |
vpath initfini.c $(full_config_sysdirs) | |
$(objpfx)initfini.s: initfini.c | |
$(compile.c) -S $(CFLAGS-initfini.s) -finhibit-size-directive \ | |
$(patsubst -f%,-fno-%,$(exceptions)) -o $@ | |
# We only have one kind of startup code files. Static binaries and | |
# shared libraries are build using the PIC version. | |
$(objpfx)crti.S: $(objpfx)initfini.s | |
sed -n -e '1,/@HEADER_ENDS/p' \ | |
-e '/@_.*_PROLOG_BEGINS/,/@_.*_PROLOG_ENDS/p' \ | |
-e '/@TRAILER_BEGINS/,$$p' $< > $@ | |
$(objpfx)crtn.S: $(objpfx)initfini.s | |
sed -n -e '1,/@HEADER_ENDS/p' \ | |
-e '/@_.*_EPILOG_BEGINS/,/@_.*_EPILOG_ENDS/p' \ | |
-e '/@TRAILER_BEGINS/,$$p' $< > $@ | |
$(objpfx)defs.h: $(objpfx)initfini.s | |
sed -n -e '/@TESTS_BEGIN/,/@TESTS_END/p' $< | \ | |
$(AWK) -f defs.awk > $@ | |
endif | |
ifeq (yes,$(elf)) | |
extra-objs += abi-note.o init.o | |
asm-CPPFLAGS += -I$(objpfx). | |
endif | |
include ../Rules | |
# Make these in the lib pass so they're available in time to link things with. | |
subdir_lib: $(extra-objs:%=$(objpfx)%) | |
define link-relocatable | |
$(CC) -nostdlib -nostartfiles -r -o $@ $^ | |
endef | |
ifndef start-installed-name-rule | |
ifeq (yes,$(elf)) | |
# We link the ELF startfile along with a SHT_NOTE section indicating | |
# the kernel ABI the binaries linked with this library will require. | |
$(objpfx)$(start-installed-name): $(objpfx)start.o $(objpfx)abi-note.o \ | |
$(objpfx)init.o | |
$(link-relocatable) | |
$(objpfx)b$(start-installed-name): $(objpfx)start.ob $(objpfx)abi-note.ob \ | |
$(objpfx)init.ob | |
$(link-relocatable) | |
else | |
# The startfile is installed under different names, so we just call our | |
# source file `start.c' and copy to the installed name after compiling. | |
$(objpfx)$(start-installed-name): $(objpfx)start.o | |
rm -f $@ | |
ln $< $@ | |
$(objpfx)b$(start-installed-name): $(objpfx)start.ob | |
rm -f $@ | |
ln $< $@ | |
endif | |
endif | |
# The profiling startfile is made by linking together the normal | |
# startfile with gmon-start.o, which defines a constructor function | |
# to turn on profiling code at startup. | |
$(addprefix $(objpfx),$(sort g$(start-installed-name) \ | |
g$(static-start-installed-name))): \ | |
$(objpfx)g%: $(objpfx)% $(objpfx)gmon-start.o | |
$(link-relocatable) | |
# These extra files are sometimes expected by system standard linking | |
# procedures, but we have nothing for them to do. So compile empty files. | |
$(addprefix $(objpfx),$(filter-out $(start-installed-name),$(csu-dummies))): | |
@-rm -f $(@:.o=.c) | |
echo > $(@:.o=.c) | |
$(COMPILE.c) $(@:.o=.c) $(OUTPUT_OPTION) | |
rm -f $(@:.o=.c) | |
# These headers are used by the startup code. | |
$(objpfx)abi-tag.h: $(..)abi-tags | |
$(make-target-directory) | |
rm -f $@.new | |
sed -e 's/#.*$$//' -e '/^[ ]*$$/d' $< | \ | |
while read conf tagos tagver; do \ | |
test `expr '$(config-machine)-$(config-vendor)-$(config-os)' \ | |
: "$$conf"` != 0 || continue; \ | |
( echo "$$tagos" | \ | |
sed -e 's/[^0-9xXa-fA-F ]//' \ | |
-e 's/^/#define __ABI_TAG_OS /'; \ | |
echo "#ifndef __ABI_TAG_VERSION"; \ | |
echo "$$tagver" | \ | |
sed -e 's/[^0-9xXa-fA-F]/ /g' -e 's/ *$$//' \ | |
-e 's/ /,/g' -e 's/^/# define __ABI_TAG_VERSION /'; \ | |
echo "#endif" ) > $@.new; \ | |
done | |
if test -r $@.new; then mv -f $@.new $@; \ | |
else echo >&2 'This configuration not matched in $<'; exit 1; fi | |
all-Banner-files = $(wildcard $(addsuffix /Banner, \ | |
$(addprefix $(..), $(subdirs)))) | |
$(objpfx)version-info.h: $(common-objpfx)config.make $(all-Banner-files) | |
$(make-target-directory) | |
(case $(config-os) in \ | |
linux*) version=`(echo -e "#include <linux/version.h>\nUTS_RELEASE"\ | |
| $(CC) -E -P - | \ | |
sed -e 's/"\([^"]*\)".*/\1/p' -e d) 2>/dev/null`;\ | |
if [ -z "$$version" ]; then \ | |
if [ -r /proc/version ]; then \ | |
version=`sed 's/.*Linux version \([^ ]*\) .*/>>\1<</' \ | |
< /proc/version`; \ | |
else \ | |
version=`uname -r`; \ | |
fi; \ | |
fi; \ | |
os=`uname -s 2> /dev/null`; \ | |
if [ -z "$$os" ]; then \ | |
os=Linux; \ | |
fi; \ | |
echo "\"Compiled on a $$os $$version system" \ | |
"on `date +%Y-%m-%d`.\\n\"" ;; \ | |
*) ;; \ | |
esac; \ | |
files="$(all-Banner-files)"; \ | |
if test -n "$$files"; then \ | |
echo "\"Available extensions:\\n\""; \ | |
sed -e '/^#/d' -e 's/^[[:space:]]*/ /' \ | |
-e 's/\(^.*$$\)/\"\1\\n\"/' $$files; \ | |
fi) > $@T | |
mv -f $@T $@ |