NPTL: Remove gratuitous Linuxisms from gai_misc.h.
[glibc.git] / csu / Makefile
blob311dbb03d7b2fd49f271b6d8bb6dcf4d0a56df59
1 # Makefile for csu code for GNU C library.
2 # Copyright (C) 1995-2014 Free Software Foundation, Inc.
3 # This file is part of the GNU C Library.
5 # The GNU C Library is free software; you can redistribute it and/or
6 # modify it under the terms of the GNU Lesser General Public
7 # License as published by the Free Software Foundation; either
8 # version 2.1 of the License, or (at your option) any later version.
10 # The GNU C Library is distributed in the hope that it will be useful,
11 # but WITHOUT ANY WARRANTY; without even the implied warranty of
12 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 # Lesser General Public License for more details.
15 # You should have received a copy of the GNU Lesser General Public
16 # License along with the GNU C Library; if not, see
17 # <http://www.gnu.org/licenses/>.
19 # This directory contains the C startup code (that which calls main). This
20 # consists of the startfile, built from start.c and installed as crt0.o
21 # (traditionally) or crt1.o (for ELF). In ELF we also install crti.o and
22 # crtn.o, special "initializer" and "finalizer" files used in the link
23 # to make the .init and .fini sections work right.
25 subdir := csu
27 include ../Makeconfig
29 routines = init-first libc-start $(libc-init) sysdep version check_fds \
30 libc-tls elf-init dso_handle
31 aux = errno
32 elide-routines.os = libc-tls
33 static-only-routines = elf-init
34 csu-dummies = $(filter-out $(start-installed-name),crt1.o Mcrt1.o)
35 extra-objs = start.o gmon-start.o \
36 $(start-installed-name) g$(start-installed-name) $(csu-dummies) \
37 S$(start-installed-name)
38 omit-deps = $(patsubst %.o,%,$(start-installed-name) g$(start-installed-name) \
39 b$(start-installed-name) $(csu-dummies) \
40 S$(start-installed-name))
41 install-lib = $(start-installed-name) g$(start-installed-name) $(csu-dummies)
42 generated += version-info.h
43 before-compile += $(objpfx)version-info.h
45 tests := tst-empty tst-atomic tst-atomic-long
46 tests-static := tst-empty
48 ifeq (yes,$(build-shared))
49 extra-objs += S$(start-installed-name)
50 install-lib += S$(start-installed-name)
51 generated += start.os
52 endif
54 ifneq ($(start-installed-name),$(static-start-installed-name))
55 extra-objs += $(static-start-installed-name) g$(static-start-installed-name)
56 omit-deps += $(patsubst %.o,%,$(static-start-installed-name) \
57 g$(static-start-installed-name))
58 install-lib += $(static-start-installed-name) g$(static-start-installed-name)
59 endif
61 before-compile += $(objpfx)abi-tag.h
62 generated += abi-tag.h
64 # These are the special initializer/finalizer files. They are always the
65 # first and last file in the link. crti.o ... crtn.o define the global
66 # "functions" _init and _fini to run the .init and .fini sections.
67 crtstuff = crti crtn
69 install-lib += $(crtstuff:=.o)
70 extra-objs += $(crtstuff:=.o)
72 extra-objs += abi-note.o init.o
73 asm-CPPFLAGS += -I$(objpfx).
75 include ../Rules
77 # Make these in the lib pass so they're available in time to link things with.
78 subdir_lib: $(extra-objs:%=$(objpfx)%)
80 define link-relocatable
81 $(CC) -nostdlib -nostartfiles -r -o $@ $^
82 endef
84 ifndef start-installed-name-rule
85 # We link the ELF startfile along with a SHT_NOTE section indicating
86 # the kernel ABI the binaries linked with this library will require.
87 $(objpfx)$(start-installed-name): $(objpfx)start.o $(objpfx)abi-note.o \
88 $(objpfx)init.o
89 $(link-relocatable)
90 $(objpfx)S$(start-installed-name): $(objpfx)start.os $(objpfx)abi-note.o \
91 $(objpfx)init.o
92 $(link-relocatable)
93 endif
95 # The profiling startfile is made by linking together the normal
96 # startfile with gmon-start.o, which defines a constructor function
97 # to turn on profiling code at startup.
98 $(addprefix $(objpfx),$(sort g$(start-installed-name) \
99 g$(static-start-installed-name))): \
100 $(objpfx)g%: $(objpfx)% $(objpfx)gmon-start.o
101 $(link-relocatable)
103 # These extra files are sometimes expected by system standard linking
104 # procedures, but we have nothing for them to do. So compile empty files.
105 $(addprefix $(objpfx),$(filter-out $(start-installed-name), $(csu-dummies))):\
106 $(before-compile)
107 $(COMPILE.c) -o $@ -x c /dev/null
109 # These headers are used by the startup code.
110 $(objpfx)abi-tag.h: $(..)abi-tags
111 $(make-target-directory)
112 rm -f $@.new
113 sed -e 's/#.*$$//' -e '/^[ ]*$$/d' $< | \
114 while read conf tagos tagver; do \
115 test `expr '$(config-machine)-$(config-vendor)-$(config-os)' \
116 : "$$conf"` != 0 || continue; \
117 ( echo "$$tagos" | \
118 sed -e 's/[^0-9xXa-fA-F ]//' \
119 -e 's/^/#define __ABI_TAG_OS /'; \
120 echo "#ifndef __ABI_TAG_VERSION"; \
121 echo "$$tagver" | \
122 sed -e 's/[^0-9xXa-fA-F]/ /g' -e 's/ *$$//' \
123 -e 's/ /,/g' -e 's/^/# define __ABI_TAG_VERSION /'; \
124 echo "#endif" ) > $@.new; \
125 done
126 if test -r $@.new; then mv -f $@.new $@; \
127 else echo >&2 'This configuration not matched in $<'; exit 1; fi
129 all-Banner-files = $(wildcard $(addsuffix /Banner,\
130 $(sort $(subdir-srcdirs) \
131 $(sysdeps-srcdirs))))
132 $(objpfx)version-info.h: $(common-objpfx)config.make $(all-Banner-files)
133 $(make-target-directory)
134 (files="$(all-Banner-files)"; \
135 if test -n "$$files"; then \
136 printf '"Available extensions:\\n"\n'; \
137 sed -e '/^#/d' -e 's/^[[:space:]]*/ /' \
138 -e 's/^\(.*\)$$/\"\1\\n\"/' $$files; \
139 fi) > $@T
140 mv -f $@T $@