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2001-03-12 Jakub Jelinek <jakub@redhat.com> * csu/Makefile (abi-tag.h): Define OS and version separately, allow version to be overriden from config.h. * csu/abi-note.S: Use OS and version separately, include config.h. * elf/dl-load.c (_dl_osversion): New. (_dl_map_object_from_fd): Kill some warnings. (open_verify): Check .note.ABI-tag of the library if present. * elf/Makefile (CPPFLAGS-dl-load.c): Add -I$(csu-objpfx). * elf/cache.c (struct cache_entry): Add osversion. (print_entry): Print osversion. (print_cache): Pass osversion to it. (compare): Sort according to osversion. (save_cache): Set osversion. (add_to_cache): Add osversion argument. * sysdeps/generic/ldconfig.h (add_to_cache, process_file, process_elf_file): Add osversion argument. * elf/readlib.c (process_file): Likewise. * sysdeps/generic/readelflib.c (process_elf_file): Likewise. * sysdeps/unix/sysv/linux/ia64/readelflib.c (process_elf_file, process_elf32_file, process_elf64_file): Likewise. * sysdeps/unix/sysv/linux/i386/readelflib.c (process_elf_file, process_elf32_file, process_elf64_file): Likewise. * sysdeps/unix/sysv/linux/sparc/readelflib.c (process_elf_file, process_elf32_file, process_elf64_file): Likewise. * elf/ldconfig.c (manual_link): Pass it. (search_dir): Issue diagnostic if two libs with the same soname in the same directory have different .note.ABI-tag. Record osversion in dlib_entry and use it from there. (struct lib_entry): Remove. (struct dlib_entry): Add osversion. * sysdeps/generic/dl-cache.c (_dl_load_cache_lookup): Check osversion. * sysdeps/generic/dl-cache.h (struct file_entry_new): Replace __unused field with osversion. * sysdeps/generic/ldsodefs.h (_dl_osversion): Declare. * sysdeps/unix/sysv/linux/init-first.c: Include ldsodefs.h. * sysdeps/unix/sysv/linux/dl-osinfo.h (DL_SYSDEP_OSCHECK): Save kernel version in _dl_osversion. * sysdeps/unix/sysv/linux/configure.in: Define __ABI_TAG_VERSION. * Makerules (build-shlib-helper, build-module-helper): New. (build-shlib, build-module-helper): Make sure .note.ABI-tag comes early. * config.h.in (__ABI_TAG_VERSION): Add. * elf/dl-minimal.c (__strtoul_internal): Set endptr on return. * sysdeps/unix/sysv/linux/i386/dl-librecon.h (EXTRA_LD_ENVVARS): Handle LD_ASSUME_KERNEL. * sysdeps/unix/sysv/linux/dl-librecon.h: New.
217 lines
7.4 KiB
Makefile
217 lines
7.4 KiB
Makefile
# Makefile for csu code for GNU C library.
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# Copyright (C) 1995,1996,1997,1998,1999,2000,2001 Free Software Foundation, Inc.
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# This file is part of the GNU C Library.
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# The GNU C Library is free software; you can redistribute it and/or
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# modify it under the terms of the GNU Library General Public License
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# as published by the Free Software Foundation; either version 2 of
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# the License, or (at your option) any later version.
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# The GNU C Library is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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# Library General Public License for more details.
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# You should have received a copy of the GNU Library General Public
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# License along with the GNU C Library; see the file COPYING.LIB. If not,
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# write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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# Boston, MA 02111-1307, USA.
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# This directory contains the C startup code (that which calls main). This
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# consists of the startfile, built from start.c and installed as crt0.o
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# (traditionally) or crt1.o (for ELF). In ELF we also install crti.o and
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# crtn.o, special "initializer" and "finalizer" files used in the link
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# to make the .init and .fini sections work right; both these files are
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# built (in an arcane manner) from initfini.c.
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subdir := csu
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routines = init-first libc-start $(libc-init) sysdep version check_fds
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csu-dummies = $(filter-out $(start-installed-name),crt1.o Mcrt1.o)
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extra-objs = start.o gmon-start.o \
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$(start-installed-name) g$(start-installed-name) $(csu-dummies)
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omit-deps = $(patsubst %.o,%,$(start-installed-name) g$(start-installed-name) \
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b$(start-installed-name) $(csu-dummies))
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install-lib = $(start-installed-name) g$(start-installed-name) $(csu-dummies)
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distribute = initfini.c gmon-start.c start.c defs.awk munch.awk \
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abi-note.S init.c munch-tmpl.c
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generated = version-info.h
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before-compile = $(objpfx)version-info.h
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all: # Make this the default target; it will be defined in Rules.
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include ../Makeconfig
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ifeq (yes,$(build-bounded))
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extra-objs += b$(start-installed-name)
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install-lib += b$(start-installed-name)
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endif
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ifeq (yes,$(elf))
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before-compile += $(objpfx)abi-tag.h
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generated += abi-tag.h
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endif
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ifeq (yes,$(gnu-ld))
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libc-init = set-init
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else
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libc-init = munch-init
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$(objpfx)munch-init.c: munch.awk munch-tmpl.c $(+subdir_inits)
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$(AWK) -f $< subdirs='$(+init_subdirs)' $(word 2,$^) > $@-t
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mv -f $@-t $@
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generated += munch-init.c
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# All initialization source files.
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+subdir_inits := $(wildcard $(foreach dir,$(subdirs),$(dir)/init-$(dir).c))
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# All subdirectories containing initialization source files.
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+init_subdirs := $(patsubst %/,%,$(dir $(+subdir_inits)))
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endif
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ifeq ($(have-initfini),yes)
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CPPFLAGS += -DHAVE_INITFINI
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# These are the special initializer/finalizer files. They are always the
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# first and last file in the link. crti.o ... crtn.o define the global
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# "functions" _init and _fini to run the .init and .fini sections.
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crtstuff = crti crtn
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install-lib += $(crtstuff:=.o)
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extra-objs += $(crtstuff:=.o)
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generated += $(crtstuff:=.S) initfini.s defs.h
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omit-deps += $(crtstuff)
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# Special rules for the building of crti.o and crtn.o
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$(objpfx)crt%.o: $(objpfx)crt%.S $(objpfx)defs.h
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$(compile.S) -g0 $(ASFLAGS-.os) -o $@
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CFLAGS-initfini.s = -g0 -fPIC -fno-inline-functions
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vpath initfini.c $(full_config_sysdirs)
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$(objpfx)initfini.s: initfini.c
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$(compile.c) -S $(CFLAGS-initfini.s) -finhibit-size-directive \
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$(patsubst -f%,-fno-%,$(exceptions)) -o $@
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# We only have one kind of startup code files. Static binaries and
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# shared libraries are build using the PIC version.
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$(objpfx)crti.S: $(objpfx)initfini.s
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sed -n -e '1,/@HEADER_ENDS/p' \
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-e '/@_.*_PROLOG_BEGINS/,/@_.*_PROLOG_ENDS/p' \
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-e '/@TRAILER_BEGINS/,$$p' $< > $@
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$(objpfx)crtn.S: $(objpfx)initfini.s
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sed -n -e '1,/@HEADER_ENDS/p' \
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-e '/@_.*_EPILOG_BEGINS/,/@_.*_EPILOG_ENDS/p' \
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-e '/@TRAILER_BEGINS/,$$p' $< > $@
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$(objpfx)defs.h: $(objpfx)initfini.s
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sed -n -e '/@TESTS_BEGIN/,/@TESTS_END/p' $< | \
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$(AWK) -f defs.awk > $@
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endif
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ifeq (yes,$(elf))
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extra-objs += abi-note.o init.o
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asm-CPPFLAGS += -I$(objpfx).
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endif
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include ../Rules
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# Make these in the lib pass so they're available in time to link things with.
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subdir_lib: $(extra-objs:%=$(objpfx)%)
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define link-relocatable
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$(CC) -nostdlib -nostartfiles -r -o $@ $^
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endef
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ifndef start-installed-name-rule
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ifeq (yes,$(elf))
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# We link the ELF startfile along with a SHT_NOTE section indicating
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# the kernel ABI the binaries linked with this library will require.
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$(objpfx)$(start-installed-name): $(objpfx)start.o $(objpfx)abi-note.o \
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$(objpfx)init.o
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$(link-relocatable)
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$(objpfx)b$(start-installed-name): $(objpfx)start.ob $(objpfx)abi-note.ob \
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$(objpfx)init.ob
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$(link-relocatable)
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else
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# The startfile is installed under different names, so we just call our
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# source file `start.c' and copy to the installed name after compiling.
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$(objpfx)$(start-installed-name): $(objpfx)start.o
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rm -f $@
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ln $< $@
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$(objpfx)b$(start-installed-name): $(objpfx)start.ob
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rm -f $@
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ln $< $@
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endif
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endif
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# The profiling startfile is made by linking together the normal
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# startfile with gmon-start.o, which defines a constructor function
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# to turn on profiling code at startup.
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$(objpfx)g$(start-installed-name): $(objpfx)$(start-installed-name) \
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$(objpfx)gmon-start.o
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$(link-relocatable)
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# These extra files are sometimes expected by system standard linking
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# procedures, but we have nothing for them to do. So compile empty files.
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$(addprefix $(objpfx),$(filter-out $(start-installed-name),$(csu-dummies))):
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@-rm -f $(@:.o=.c)
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echo > $(@:.o=.c)
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$(COMPILE.c) $(@:.o=.c) $(OUTPUT_OPTION)
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rm -f $(@:.o=.c)
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# These headers are used by the startup code.
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$(objpfx)abi-tag.h: $(..)abi-tags
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$(make-target-directory)
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rm -f $@.new
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sed -e 's/#.*$$//' -e '/^[ ]*$$/d' $< | \
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while read conf tagos tagver; do \
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test `expr '$(config-machine)-$(config-vendor)-$(config-os)' \
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: "$$conf"` != 0 || continue; \
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( echo "$$tagos" | \
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sed -e 's/[^0-9xXa-fA-F ]//' \
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-e 's/^/#define __ABI_TAG_OS /'; \
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echo "#ifndef __ABI_TAG_VERSION"; \
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echo "$$tagver" | \
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sed -e 's/[^0-9xXa-fA-F]/ /g' -e 's/ *$$//' \
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-e 's/ /,/g' -e 's/^/# define __ABI_TAG_VERSION /'; \
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echo "#endif" ) > $@.new; \
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done
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if test -r $@.new; then mv -f $@.new $@; \
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else echo >&2 'This configuration not matched in $<'; exit 1; fi
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all-Banner-files = $(wildcard $(addsuffix /Banner, \
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$(addprefix $(..), $(subdirs))))
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$(objpfx)version-info.h: $(common-objpfx)config.make $(all-Banner-files)
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$(make-target-directory)
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(case $(config-os) in \
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linux*) version=`(echo -e "#include <linux/version.h>\nUTS_RELEASE"\
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| $(CC) -E -P - | \
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sed -e 's/"\([^"]*\)".*/\1/p' -e d) 2>/dev/null`;\
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if [ -z "$$version" ]; then \
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if [ -r /proc/version ]; then \
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version=`sed 's/.*Linux version \([^ ]*\) .*/>>\1<</' \
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< /proc/version`; \
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else \
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version=`uname -r`; \
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fi; \
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fi; \
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os=`uname -s 2> /dev/null`; \
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if [ -z "$$os" ]; then \
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os=Linux; \
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fi; \
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echo "\"Compiled on a $$os $$version system" \
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"on `date +%Y-%m-%d`.\\n\"" ;; \
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*) ;; \
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esac; \
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files="$(all-Banner-files)"; \
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if test -n "$$files"; then \
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echo "\"Available extensions:\\n\""; \
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sed -e '/^#/d' -e 's/^[[:space:]]*/ /' \
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-e 's/\(^.*$$\)/\"\1\\n\"/' $$files; \
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fi) > $@T
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mv -f $@T $@
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