# Makefile for csu code for GNU C library.
-
-# Copyright (C) 1995, 1996, 1997 Free Software Foundation, Inc.
+# Copyright (C) 1995-2014 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 Library General Public License
-# as published by the Free Software Foundation; either version 2 of
-# the License, or (at your option) any later version.
+# 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
-# Library General Public License for more details.
+# Lesser General Public License for more details.
-# You should have received a copy of the GNU Library General Public
-# License along with the GNU C Library; see the file COPYING.LIB. If not,
-# write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
-# Boston, MA 02111-1307, USA.
+# You should have received a copy of the GNU Lesser General Public
+# License along with the GNU C Library; if not, see
+# <http://www.gnu.org/licenses/>.
# 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 in 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.
+# (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.
subdir := csu
-routines = init-first
+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) \
- $(csu-dummies)
-ifeq ($(elf),yes)
-before-compile = $(objpfx)abi-tag.h
-endif
+ $(start-installed-name) g$(start-installed-name) $(csu-dummies) \
+ S$(start-installed-name)
omit-deps = $(patsubst %.o,%,$(start-installed-name) g$(start-installed-name) \
- $(csu-dummies))
-install-lib = $(start-installed-name) g$(start-installed-name) \
- $(csu-dummies)
-distribute = initfini.c gmon-start.c start.c defs.awk abi-note.S
+ b$(start-installed-name) $(csu-dummies) \
+ S$(start-installed-name))
+install-lib = $(start-installed-name) g$(start-installed-name) $(csu-dummies)
+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)
+generated += start.os
+endif
-ifeq ($(have-initfini),yes)
+ifneq ($(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
-CPPFLAGS += -DHAVE_INITFINI
+before-compile += $(objpfx)abi-tag.h
+generated += abi-tag.h
# 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
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 $@
-
-CFLAGS-initfini.s = -O0 -g0 -fPIC
-
-$(objpfx)initfini.s: initfini.c
- $(compile.c) -S $(CFLAGS-initfini.s) -finhibit-size-directive \
- $(no-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
+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 the kernel ABI the binaries linked with this library will require.
-$(objpfx)$(start-installed-name): $(objpfx)start.o $(objpfx)abi-note.o
+# the kernel ABI the binaries linked with this library will require.
+$(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
$(link-relocatable)
-else
-# The startfile is installed under different names, so we just call our
-# source file `start.c' and copy to the installed name after compiling.
-$(objpfx)$(start-installed-name): $(objpfx)start.o
- rm -f $@
- ln $< $@
-endif
endif
# The profiling startfile is made by linking together the normal
# startfile with gmon-start.o, which defines a constructor function
# to turn on profiling code at startup.
-$(objpfx)g$(start-installed-name): $(objpfx)$(start-installed-name) \
- $(objpfx)gmon-start.o
+$(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))):
- cp /dev/null $(@:.o=.c)
- $(COMPILE.c) $(@:.o=.c) $(OUTPUT_OPTION)
- rm -f $(@:.o=.c)
+$(addprefix $(objpfx),$(filter-out $(start-installed-name), $(csu-dummies))):\
+ $(before-compile)
+ $(COMPILE.c) -o $@ -x c /dev/null
-/ := $$/# bite me.
+# These headers are used by the startup code.
$(objpfx)abi-tag.h: $(..)abi-tags
$(make-target-directory)
rm -f $@.new
- sed 's/#.*$//;/^[ ]*$$/d' $< | while read conf tag; do \
+ sed -e 's/#.*$$//' -e '/^[ ]*$$/d' $< | \
+ while read conf tagos tagver; do \
test `expr '$(config-machine)-$(config-vendor)-$(config-os)' \
: "$$conf"` != 0 || continue; \
- echo "$$tag" | sed > $@.new \
- 's/[^0-9xXa-fA-F]/ /g;s/ *$//;s/ /,/g;s/^ */#define ABI_TAG /';\
+ ( 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,\
+ $(sort $(subdir-srcdirs) \
+ $(sysdeps-srcdirs))))
+$(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) -O -E -P - -DNOT_IN_libc=1 | \
+ sed -e 's/"\([^"]*\)".*/\1/p' -e d) 2>/dev/null`;\
+ if [ -z "$$version" ]; then \
+ version=`(printf '%s\n%s\n' \
+ '#include <linux/version.h>' \
+ LINUX_VERSION_CODE \
+ | $(CC) $(CPPFLAGS) -O -E -P - -DNOT_IN_libc=1 \
+ | sed -n -e '/^[123456789].*/p' \
+ | awk '{v=$$1; \
+ printf("%d.%d.%d\n", \
+ v/65535, v/256%256, v%256)}') \
+ 2>/dev/null`; \
+ fi; \
+ 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 \
+ printf '"Available extensions:\\n"\n'; \
+ sed -e '/^#/d' -e 's/^[[:space:]]*/ /' \
+ -e 's/^\(.*\)$$/\"\1\\n\"/' $$files; \
+ fi) > $@T
+ mv -f $@T $@
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