# Makefile for csu code for GNU C library.
-# Copyright (C) 1995 Free Software Foundation, Inc.
+# Copyright (C) 1995, 1996, 1997 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
# 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.
+# 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.
# 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.
+# (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.
subdir := csu
+routines = init-first
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
+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) \
+ $(csu-dummies))
+install-lib = $(start-installed-name) g$(start-installed-name) \
+ $(csu-dummies)
+distribute = initfini.c gmon-start.c start.c defs.awk abi-note.S abi-tag.h
all: # Make this the default target; it will be defined in Rules.
include ../Makeconfig
-ifneq ($(elf),yes)
-# When not using ELF, there is just one startfile, called crt0.o.
-start-installed-name = crt0.o
+ifeq ($(have-initfini),yes)
-else
-
-# In the ELF universe, crt0.o is called crt1.o, and there are
-# some additional bizarre files.
-start-installed-name = crt1.o
+CPPFLAGS += -DHAVE_INITFINI
# These are the special initializer/finalizer files. They are always the
# first and last file in the link. crti.o ... crtn.o define the global
# "functions" _init and _fini to run the .init and .fini sections.
crtstuff = crti crtn
+# If we need separate startup code, require separate code.
+ifeq ($(need-nopic-initfini),yes)
+crtstuff += crtiS crtnS
+endif
+
install-lib += $(crtstuff:=.o)
extra-objs += $(crtstuff:=.o)
-generated += $(crtstuff:=.s)
+generated += $(crtstuff:=.S) initfini.s initfiniS.s align.h end.h
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)
-
-define initfini
--rm -f $(objpfx)crtcommon.tmp
-(echo 'cat > crtcommon.tmp <<\EOF_common'; \
- $(CC) $< $(CPPFLAGS) $(CFLAGS) \
- -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
+# Special rules for the building of crti.o and crtn.o
+$(objpfx)crt%.o: $(objpfx)crt%.S $(objpfx)defs.h
+ $(compile.S) -g0 -o $@
+
+$(objpfx)initfini.s: initfini.c
+ $(compile.c) -g0 -S -finhibit-size-directive \
+ $(no-exceptions) -o $@
+
+$(objpfx)initfiniS.s: initfini.c
+ $(compile.c) -g0 -S -fPIC -finhibit-size-directive \
+ $(no-exceptions) -o $@
+
+ifneq ($(need-nopic-initfini),yes)
+# We only have one kind of startup code files. Static binaries and
+# shared libraries are build using the PIC version.
+$(objpfx)crti.S: $(objpfx)initfiniS.s
+ sed -n -e '1,/@HEADER_ENDS/p' \
+ -e '/@_.*_PROLOG_BEGINS/,/@_.*_PROLOG_ENDS/p' \
+ -e '/@TRAILER_BEGINS/,$$p' $< > $@
+
+$(objpfx)crtn.S: $(objpfx)initfiniS.s
+ sed -n -e '1,/@HEADER_ENDS/p' \
+ -e '/@_.*_EPILOG_BEGINS/,/@_.*_EPILOG_ENDS/p' \
+ -e '/@TRAILER_BEGINS/,$$p' $< > $@
+else
+# We have to build two versions, one with one without PIC code.
+$(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)crtiS.S: $(objpfx)initfiniS.s
+ sed -n -e '1,/@HEADER_ENDS/p' \
+ -e '/@_.*_PROLOG_BEGINS/,/@_.*_PROLOG_ENDS/p' \
+ -e '/@TRAILER_BEGINS/,$$p' $< > $@
+
+$(objpfx)crtnS.S: $(objpfx)initfiniS.s
+ sed -n -e '1,/@HEADER_ENDS/p' \
+ -e '/@_.*_EPILOG_BEGINS/,/@_.*_EPILOG_ENDS/p' \
+ -e '/@TRAILER_BEGINS/,$$p' $< > $@
+endif
+
+$(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
+endif
+
include ../Rules
+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
+ $(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 $@
+ 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
+ $(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.
cp /dev/null $(@:.o=.c)
$(COMPILE.c) $(@:.o=.c) $(OUTPUT_OPTION)
rm -f $(@:.o=.c)
-
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