[thirdparty/glibc.git] / csu / Makefile

# Makefile for csu code for GNU C library.
# Copyright (C) 1995-2003, 2004 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 elf-init dso_handle
aux	 = errno
elide-routines.os = libc-tls
static-only-routines = elf-init
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) $(csu-dummies) \
	     S$(start-installed-name)
omit-deps = $(patsubst %.o,%,$(start-installed-name) g$(start-installed-name) \
			     b$(start-installed-name) $(csu-dummies) \
			     S$(start-installed-name))
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 not-cancel.h
generated = version-info.h
before-compile = $(objpfx)version-info.h

tests := tst-empty tst-atomic tst-atomic-long
tests-static := tst-empty

all: # Make this the default target; it will be defined in Rules.

include ../Makeconfig

ifeq (yes,$(build-shared))
extra-objs += S$(start-installed-name)
install-lib += S$(start-installed-name)
endif

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
$(crtstuff:%=$(objpfx)%.o): %.o: %.S $(objpfx)defs.h
	$(compile.S) -g0 $(ASFLAGS-.os) -o $@

CFLAGS-initfini.s = -g0 -fPIC -fno-inline-functions $(fno-unit-at-a-time)

vpath initfini.c $(full_config_sysdirs)

$(objpfx)initfini.s: initfini.c $(before-compile)
	$(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' $< > $@

# These explicit rules are necessary when the $(objpfx) subdirectory
# did not exist at the time make considered the implicit rules using it.
# This comes up with a fresh build using no_deps=t.
$(patsubst %,$(objpfx)crt%.o,i n): %.o: %.S

$(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)
$(objpfx)S$(start-installed-name): $(objpfx)start.os $(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 $< $@
$(objpfx)S$(start-installed-name): $(objpfx)start.os
	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))):\
  $(before-compile)
	$(COMPILE.c) -o $@ -x c /dev/null

# 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=`(printf '%s\n%s\n' \
				    '#include <linux/version.h>' \
				    UTS_RELEASE \
			     | $(CC) $(CPPFLAGS) -E -P - -DNOT_IN_libc=1 | \
			     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 "$$os" ]; then \
		     os=Linux; \
		   fi; \
		   printf '"Compiled on a %s %s system on %s.\\n"\n' \
			  "$$os" "$$version" "`date +%Y-%m-%d`";; \
	   *) ;; \
	 esac; \
	 files="$(all-Banner-files)";				\
	 if test -n "$$files"; then				\
	   echo "\"Available extensions:\\n\"";			\
	   sed -e '/^#/d' -e 's/^[[:space:]]*/	/'		\
	       -e 's/^\(.*\)$$/\"\1\\n\"/' $$files;		\
	 fi) > $@T
	mv -f $@T $@
Commit	Line	Data
28f540f4	1	# Makefile for csu code for GNU C library.
a334319f	2	# Copyright (C) 1995-2003, 2004 Free Software Foundation, Inc.
28f540f4 RM	3	# This file is part of the GNU C Library.
	4
	5	# The GNU C Library is free software; you can redistribute it and/or
41bdb6e2 AJ	6	# modify it under the terms of the GNU Lesser General Public
	7	# License as published by the Free Software Foundation; either
	8	# version 2.1 of the License, or (at your option) any later version.
28f540f4 RM	9
	10	# The GNU C Library is distributed in the hope that it will be useful,
	11	# but WITHOUT ANY WARRANTY; without even the implied warranty of
41bdb6e2 AJ	12	# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
41bdb6e2 AJ	13	# Lesser General Public License for more details.
28f540f4	14
41bdb6e2 AJ	15	# You should have received a copy of the GNU Lesser General Public
	16	# License along with the GNU C Library; if not, write to the Free
	17	# Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
	18	# 02111-1307 USA.
28f540f4 RM	19
	20	# This directory contains the C startup code (that which calls main). This
	21	# consists of the startfile, built from start.c and installed as crt0.o
0f9cc699	22	# (traditionally) or crt1.o (for ELF). In ELF we also install crti.o and
b5ca0fb0	23	# crtn.o, special "initializer" and "finalizer" files used in the link
11c981a9 RM	24	# to make the .init and .fini sections work right; both these files are
11c981a9 RM	25	# built (in an arcane manner) from initfini.c.
28f540f4 RM	26
	27	subdir := csu
	28
8a30f00f	29	routines = init-first libc-start $(libc-init) sysdep version check_fds \
ee2a5ae8	30	libc-tls elf-init dso_handle
ce460d04	31	aux = errno
2a76f7ef	32	elide-routines.os = libc-tls
06b31ad3	33	static-only-routines = elf-init
b6da933b	34	csu-dummies = $(filter-out $(start-installed-name),crt1.o Mcrt1.o)
11c981a9	35	extra-objs = start.o gmon-start.o \
b6da933b UD	36	$(start-installed-name) g$(start-installed-name) $(csu-dummies) \
b6da933b UD	37	S$(start-installed-name)
11c981a9	38	omit-deps = $(patsubst %.o,%,$(start-installed-name) g$(start-installed-name) \
bc4647a1 UD	39	b$(start-installed-name) $(csu-dummies) \
bc4647a1 UD	40	S$(start-installed-name))
98186375	41	install-lib = $(start-installed-name) g$(start-installed-name) $(csu-dummies)
a334319f UD	42	distribute = initfini.c gmon-start.c start.c defs.awk munch.awk \
a334319f UD	43	abi-note.S init.c munch-tmpl.c not-cancel.h
c7562c74 UD	44	generated = version-info.h
c7562c74 UD	45	before-compile = $(objpfx)version-info.h
28f540f4	46
78c9da10 RM	47	tests := tst-empty tst-atomic tst-atomic-long
78c9da10 RM	48	tests-static := tst-empty
d15851ec	49
28f540f4 RM	50	all: # Make this the default target; it will be defined in Rules.
	51
	52	include ../Makeconfig
	53
bc4647a1 UD	54	ifeq (yes,$(build-shared))
	55	extra-objs += S$(start-installed-name)
	56	install-lib += S$(start-installed-name)
	57	endif
	58
ac556388 GM	59	ifeq (yes,$(build-bounded))
	60	extra-objs += b$(start-installed-name)
	61	install-lib += b$(start-installed-name)
	62	endif
	63
083973f3 RM	64	ifneq ($(start-installed-name),$(static-start-installed-name))
	65	extra-objs += $(static-start-installed-name) g$(static-start-installed-name)
	66	omit-deps += $(patsubst %.o,%,$(static-start-installed-name) \
	67	g$(static-start-installed-name))
	68	install-lib += $(static-start-installed-name) g$(static-start-installed-name)
	69	endif
	70
c7562c74 UD	71	ifeq (yes,$(elf))
c7562c74 UD	72	before-compile += $(objpfx)abi-tag.h
da2d1bc5	73	generated += abi-tag.h
a5a0310d	74	endif
b8dc6a10	75
a334319f UD	76	ifneq (yes,$(gnu-ld))
	77	libc-init = munch-init
	78	$(objpfx)munch-init.c: munch.awk munch-tmpl.c $(+subdir_inits)
	79	$(AWK) -f $< subdirs='$(+init_subdirs)' $(word 2,$^) > $@-t
	80	mv -f $@-t $@
	81	generated += munch-init.c
	82
	83	# All initialization source files.
	84	+subdir_inits := $(wildcard $(foreach dir,$(subdirs),$(dir)/init-$(dir).c))
	85	# All subdirectories containing initialization source files.
	86	+init_subdirs := $(patsubst %/,%,$(dir $(+subdir_inits)))
	87	endif
	88
307bcd77	89	ifeq ($(have-initfini),yes)
37f91d33	90
294897f4 RM	91	CPPFLAGS += -DHAVE_INITFINI
294897f4 RM	92
37f91d33	93	# These are the special initializer/finalizer files. They are always the
4e1bac76 RM	94	# first and last file in the link. crti.o ... crtn.o define the global
	95	# "functions" _init and _fini to run the .init and .fini sections.
	96	crtstuff = crti crtn
37f91d33 RM	97
	98	install-lib += $(crtstuff:=.o)
	99	extra-objs += $(crtstuff:=.o)
9a0a462c	100	generated += $(crtstuff:=.S) initfini.s defs.h
37f91d33	101	omit-deps += $(crtstuff)
28f540f4	102
307bcd77	103	# Special rules for the building of crti.o and crtn.o
4b0b5882	104	$(crtstuff:%=$(objpfx)%.o): %.o: %.S $(objpfx)defs.h
f41c8091	105	$(compile.S) -g0 $(ASFLAGS-.os) -o $@
307bcd77	106
49803108	107	CFLAGS-initfini.s = -g0 -fPIC -fno-inline-functions $(fno-unit-at-a-time)
9a0a462c	108
a334319f	109	vpath initfini.c $(full_config_sysdirs)
93414bb9	110
05d3d580	111	$(objpfx)initfini.s: initfini.c $(before-compile)
9a0a462c	112	$(compile.c) -S $(CFLAGS-initfini.s) -finhibit-size-directive \
e1b13a63	113	$(patsubst -f%,-fno-%,$(exceptions)) -o $@
307bcd77	114
0f9cc699	115	# We only have one kind of startup code files. Static binaries and
5ae3e846	116	# shared libraries are build using the PIC version.
307bcd77 UD	117	$(objpfx)crti.S: $(objpfx)initfini.s
	118	sed -n -e '1,/@HEADER_ENDS/p' \
	119	-e '/@_._PROLOG_BEGINS/,/@_._PROLOG_ENDS/p' \
	120	-e '/@TRAILER_BEGINS/,$$p' $< > $@
	121
	122	$(objpfx)crtn.S: $(objpfx)initfini.s
	123	sed -n -e '1,/@HEADER_ENDS/p' \
	124	-e '/@_._EPILOG_BEGINS/,/@_._EPILOG_ENDS/p' \
	125	-e '/@TRAILER_BEGINS/,$$p' $< > $@
	126
adee0e1f RM	127	# These explicit rules are necessary when the $(objpfx) subdirectory
	128	# did not exist at the time make considered the implicit rules using it.
	129	# This comes up with a fresh build using no_deps=t.
	130	$(patsubst %,$(objpfx)crt%.o,i n): %.o: %.S
	131
307bcd77 UD	132	$(objpfx)defs.h: $(objpfx)initfini.s
307bcd77 UD	133	sed -n -e '/@TESTS_BEGIN/,/@TESTS_END/p' $< \| \
5aa8ff62	134	$(AWK) -f defs.awk > $@
28f540f4	135
37f91d33	136	endif
28f540f4	137
51702635	138	ifeq (yes,$(elf))
6973fc01	139	extra-objs += abi-note.o init.o
92f1da4d	140	asm-CPPFLAGS += -I$(objpfx).
51702635 UD	141	endif
51702635 UD	142
28f540f4 RM	143	include ../Rules
28f540f4 RM	144
71cf0361 UD	145	# Make these in the lib pass so they're available in time to link things with.
	146	subdir_lib: $(extra-objs:%=$(objpfx)%)
	147
779ae82e UD	148	define link-relocatable
	149	$(CC) -nostdlib -nostartfiles -r -o $@ $^
	150	endef
	151
b8dc6a10	152	ifndef start-installed-name-rule
779ae82e UD	153	ifeq (yes,$(elf))
779ae82e UD	154	# We link the ELF startfile along with a SHT_NOTE section indicating
3081378b	155	# the kernel ABI the binaries linked with this library will require.
6973fc01 UD	156	$(objpfx)$(start-installed-name): $(objpfx)start.o $(objpfx)abi-note.o \
6973fc01 UD	157	$(objpfx)init.o
779ae82e	158	$(link-relocatable)
bc4647a1 UD	159	$(objpfx)S$(start-installed-name): $(objpfx)start.os $(objpfx)abi-note.o \
	160	$(objpfx)init.o
	161	$(link-relocatable)
58ff985d GM	162	$(objpfx)b$(start-installed-name): $(objpfx)start.ob $(objpfx)abi-note.ob \
	163	$(objpfx)init.ob
	164	$(link-relocatable)
779ae82e	165	else
28f540f4 RM	166	# The startfile is installed under different names, so we just call our
	167	# source file `start.c' and copy to the installed name after compiling.
	168	$(objpfx)$(start-installed-name): $(objpfx)start.o
779ae82e	169	rm -f $@
28f540f4	170	ln $< $@
bc4647a1 UD	171	$(objpfx)S$(start-installed-name): $(objpfx)start.os
	172	rm -f $@
	173	ln $< $@
98186375 GM	174	$(objpfx)b$(start-installed-name): $(objpfx)start.ob
	175	rm -f $@
	176	ln $< $@
b8dc6a10	177	endif
779ae82e	178	endif
28f540f4	179
11c981a9 RM	180	# The profiling startfile is made by linking together the normal
	181	# startfile with gmon-start.o, which defines a constructor function
	182	# to turn on profiling code at startup.
083973f3 RM	183	$(addprefix $(objpfx),$(sort g$(start-installed-name) \
	184	g$(static-start-installed-name))): \
	185	$(objpfx)g%: $(objpfx)% $(objpfx)gmon-start.o
779ae82e	186	$(link-relocatable)
11c981a9	187
28f540f4 RM	188	# These extra files are sometimes expected by system standard linking
28f540f4 RM	189	# procedures, but we have nothing for them to do. So compile empty files.
b6da933b	190	$(addprefix $(objpfx),$(filter-out $(start-installed-name), $(csu-dummies))):\
c6696b79 RM	191	$(before-compile)
c6696b79 RM	192	$(COMPILE.c) -o $@ -x c /dev/null
92f1da4d	193
c7562c74	194	# These headers are used by the startup code.
92f1da4d	195	$(objpfx)abi-tag.h: $(..)abi-tags
39e16978	196	$(make-target-directory)
92f1da4d	197	rm -f $@.new
0f9cc699	198	sed -e 's/#.$$//' -e '/^[ ]$$/d' $< \| \
a986484f	199	while read conf tagos tagver; do \
92f1da4d UD	200	test `expr '$(config-machine)-$(config-vendor)-$(config-os)' \
92f1da4d UD	201	: "$$conf"` != 0 \|\| continue; \
a986484f UD	202	( echo "$$tagos" \| \
	203	sed -e 's/[^0-9xXa-fA-F ]//' \
	204	-e 's/^/#define __ABI_TAG_OS /'; \
	205	echo "#ifndef __ABI_TAG_VERSION"; \
	206	echo "$$tagver" \| \
	207	sed -e 's/[^0-9xXa-fA-F]/ /g' -e 's/ *$$//' \
	208	-e 's/ /,/g' -e 's/^/# define __ABI_TAG_VERSION /'; \
	209	echo "#endif" ) > $@.new; \
92f1da4d UD	210	done
	211	if test -r $@.new; then mv -f $@.new $@; \
	212	else echo >&2 'This configuration not matched in $<'; exit 1; fi
c7562c74	213
a334319f UD	214	all-Banner-files = $(wildcard $(addsuffix /Banner, \
a334319f UD	215	$(addprefix $(..), $(subdirs))))
c7562c74 UD	216	$(objpfx)version-info.h: $(common-objpfx)config.make $(all-Banner-files)
	217	$(make-target-directory)
	218	(case $(config-os) in \
e7f4d2bf RM	219	linux*) version=`(printf '%s\n%s\n' \
	220	'#include <linux/version.h>' \
	221	UTS_RELEASE \
b30542fb	222	\| $(CC) $(CPPFLAGS) -E -P - -DNOT_IN_libc=1 \| \
c7562c74 UD	223	sed -e 's/"\([^"]\)"./\1/p' -e d) 2>/dev/null`;\
	224	if [ -z "$$version" ]; then \
	225	if [ -r /proc/version ]; then \
b48abe3c	226	version=`sed 's/.Linux version \([^ ]\) .*/>>\1<</' \
c7562c74 UD	227	< /proc/version`; \
	228	else \
	229	version=`uname -r`; \
	230	fi; \
	231	fi; \
c269fdb4 UD	232	os=`uname -s 2> /dev/null`; \
	233	if [ -z "$$os" ]; then \
	234	os=Linux; \
	235	fi; \
e7f4d2bf RM	236	printf '"Compiled on a %s %s system on %s.\\n"\n' \
e7f4d2bf RM	237	"$$os" "$$version" "`date +%Y-%m-%d`";; \
c7562c74 UD	238	*) ;; \
	239	esac; \
	240	files="$(all-Banner-files)"; \
	241	if test -n "$$files"; then \
a334319f	242	echo "\"Available extensions:\\n\""; \
0f9cc699	243	sed -e '/^#/d' -e 's/^[[:space:]]*/ /' \
63461e75	244	-e 's/^\(.*\)$$/\"\1\\n\"/' $$files; \
c7562c74 UD	245	fi) > $@T
c7562c74 UD	246	mv -f $@T $@