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Diffstat (limited to 'REORG.TODO/csu/Makefile')
| -rw-r--r-- | REORG.TODO/csu/Makefile | 161 |
1 files changed, 161 insertions, 0 deletions
diff --git a/REORG.TODO/csu/Makefile b/REORG.TODO/csu/Makefile new file mode 100644 index 0000000000..88646b6e8f --- /dev/null +++ b/REORG.TODO/csu/Makefile @@ -0,0 +1,161 @@ +# Makefile for csu code for GNU C library. +# Copyright (C) 1995-2017 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, 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 used in the link +# to make the .init and .fini sections work right. + +subdir := csu + +include ../Makeconfig + +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 \ + $(start-installed-name) g$(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) +generated += version-info.h +before-compile += $(objpfx)version-info.h + +# No tests are allowed in the csu/ subdirectory because the startup +# code is compiled with special flags. +tests = + +CFLAGS-.o += $(no-stack-protector) +CFLAGS-.op += $(no-stack-protector) +CFLAGS-.os += $(no-stack-protector) + +ifeq (yes,$(build-shared)) +extra-objs += S$(start-installed-name) gmon-start.os +ifneq ($(start-installed-name),$(static-start-installed-name)) +extra-objs += gmon-start.o +endif +install-lib += S$(start-installed-name) +generated += start.os +else +extra-objs += gmon-start.o +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 + +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 +# "functions" _init and _fini to run the .init and .fini sections. +crtstuff = crti crtn + +install-lib += $(crtstuff:=.o) +extra-objs += $(crtstuff:=.o) + +extra-objs += abi-note.o init.o +asm-CPPFLAGS += -I$(objpfx). + +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 $@ $^ +endef + +ifndef start-installed-name-rule +# We link the ELF startfile along with a SHT_NOTE section indicating +# the kernel ABI the binaries linked with this library will require. +$(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 + $(link-relocatable) +endif + +# The profiling startfile is made by linking together the normal +# startfile with gmon-start.o, which defines a constructor function +# to turn on profiling code at startup. +ifeq (yes,$(build-shared)) +$(objpfx)g$(start-installed-name): \ + $(objpfx)g%: $(objpfx)S% $(objpfx)gmon-start.os + $(link-relocatable) +ifneq ($(start-installed-name),$(static-start-installed-name)) +$(objpfx)g$(static-start-installed-name): \ + $(objpfx)g%: $(objpfx)% $(objpfx)gmon-start.o + $(link-relocatable) +endif +else +$(addprefix $(objpfx),$(sort g$(start-installed-name) \ + g$(static-start-installed-name))): \ + $(objpfx)g%: $(objpfx)% $(objpfx)gmon-start.o + $(link-relocatable) +endif + +# These extra files are sometimes expected by system standard linking +# procedures, but we have nothing for them to do. So compile empty files. +$(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,\ + $(sort $(subdir-srcdirs) \ + $(sysdeps-srcdirs)))) +$(objpfx)version-info.h: $(common-objpfx)config.make $(all-Banner-files) + $(make-target-directory) + (files="$(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 $@ |