mirror of
https://sourceware.org/git/glibc.git
synced 2024-11-28 04:03:35 +08:00
37f91d336d
* csu/Makefile (crtstuff): New variable consolidates crti, crtn; add crti_s, crtn_s. (install-lib, extra-objs, generated-, omit-deps): Use that. (initfini): New canned sequence, broken out of crt[in].s rule. (crt[in].s rule): Use it. (crt[in]_s.s): New rule. * csu/initfini.c (GLOBAL): New macro; define it to empty if undefined. (_init, _fini): Use GLOBAL as storage class. Add self reference to avoid GCC optimizing out the functions. * Makefile (headers): Remove $(stddef.h). * Makeconfig (stddef.h): Variable removed; now require gcc version >= 2.2. * stddef.h: File removed. Mon Feb 20 19:42:31 1995 Roland McGrath <roland@churchy.gnu.ai.mit.edu> * sysdeps/unix/bsd/ultrix4/mips/start.S: Remove `__environ' definition. * sysdeps/unix/bsd/osf1/alpha/start.S: Likewise. * stdlib/strtod.c: Allow the string to start with a decimal point without a leading zero.
103 lines
3.9 KiB
Makefile
103 lines
3.9 KiB
Makefile
# Makefile for csu code for GNU C library.
|
|
|
|
# Copyright (C) 1995 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.
|
|
|
|
# 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.
|
|
|
|
# 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., 675 Mass Ave,
|
|
# Cambridge, MA 02139, 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); and some initialization code which
|
|
# is in the C library itself. 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.
|
|
|
|
subdir := csu
|
|
|
|
csu-dummies = $(filter-out $(start-installed-name),crt1.o Mcrt1.o)
|
|
extra-objs = start.o $(start-installed-name) $(csu-dummies)
|
|
omit-deps = $(patsubst %.o,%,$(start-installed-name) $(csu-dummies))
|
|
install-lib = $(start-installed-name) $(csu-dummies)
|
|
distribute = initfini.c
|
|
|
|
all: # Make this the default target; it will be defined in Rules.
|
|
|
|
include ../Makeconfig
|
|
|
|
ifneq ($(elf),yes)
|
|
|
|
# When not using ELF, there is just one startfile, called crt0.o.
|
|
start-installed-name = crt0.o
|
|
|
|
else
|
|
|
|
# In the ELF universe, crt0.o is called crt1.o, and there are
|
|
# some additional bizarre files.
|
|
start-installed-name = crt1.o
|
|
|
|
# These are the special initializer/finalizer files. They are always the
|
|
# first and last file in the link. crti.o ... crtn.o are used for normal
|
|
# linking; they define the global "functions" _init and _fini to run the
|
|
# .init and .fini sections. crti_s.o ... crtn_s.o are for making shared
|
|
# library objects; they put the prologue/epilogue code into the .init and
|
|
# .fini sections, but define no global symbols.
|
|
crtstuff = crti crtn crti_s crtn_s
|
|
|
|
install-lib += $(crtstuff:=.o)
|
|
extra-objs += $(crtstuff:=.o)
|
|
generated += $(crtstuff:=.s)
|
|
omit-deps += $(crtstuff)
|
|
|
|
# Compile initfini.c to assembly code, which contains embedded shell
|
|
# commands that prodice crti.s-new and crtn.s-new when run. We need to
|
|
# disable emission of .size directives and debugging information, since
|
|
# they will get confused by the splitting of the output we do.
|
|
$(objpfx)cr%i.s $(objpfx)cr%n.s: initfini.c; $(initfini)
|
|
$(objpfx)cr%i_s.s $(objpfx)cr%n_s.s: initfini.c; $(initfini)
|
|
|
|
define initfini
|
|
-rm -f $(objpfx)crtcommon.tmp
|
|
(echo 'cat > crtcommon.tmp <<\EOF_common'; \
|
|
$(CC) $< $(CPPFLAGS) $(CFLAGS) \
|
|
$(patsubst %,-DGLOBAL=static,$(filter %_s.s,$@)) \
|
|
-finhibit-size-directive -g0 -S -o -; \
|
|
echo 'EOF_common') | (cd $(@D); $(SHELL))
|
|
cat $(objpfx)crtcommon.tmp >> $(objpfx)crti.s-new
|
|
cat $(objpfx)crtcommon.tmp >> $(objpfx)crtn.s-new
|
|
rm -f $(objpfx)crtcommon.tmp
|
|
mv -f $(objpfx)crti.s-new $(subst crtn,crti,$@)
|
|
mv -f $(objpfx)crtn.s-new $(subst crti,crtn,$@)
|
|
endef
|
|
|
|
endif
|
|
|
|
include ../Rules
|
|
|
|
# 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 $< $@
|
|
|
|
# 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)
|
|
|