elf/Makefile

   1 # Makefile for elf subdirectory of GNU C Library.
   2
   3 # Copyright (C) 1995, 1996 Free Software Foundation, Inc.
   4 # This file is part of the GNU C Library.
   5
   6 # The GNU C Library is free software; you can redistribute it and/or
   7 # modify it under the terms of the GNU Library General Public License as
   8 # published by the Free Software Foundation; either version 2 of the
   9 # License, or (at your option) any later version.
  10
  11 # The GNU C Library is distributed in the hope that it will be useful,
  12 # but WITHOUT ANY WARRANTY; without even the implied warranty of
  13 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14 # Library General Public License for more details.
  15
  16 # You should have received a copy of the GNU Library General Public
  17 # License along with the GNU C Library; see the file COPYING.LIB.  If
  18 # not, write to the Free Software Foundation, Inc., 675 Mass Ave,
  19 # Cambridge, MA 02139, USA.
  20
  21 subdir          := elf
  22
  23 headers         := elf.h libelf.h link.h dlfcn.h
  24 routines        := init-first
  25
  26 extra-libs      = libelf libdl
  27 libelf-routines := elf_hash
  28 libdl-routines  := dlopen dlclose dlsym dlerror
  29 libdl-inhibit-o = $(filter-out .so,$(object-suffixes)) # Build only shared.
  30
  31 rtld-routines   := rtld $(addprefix dl-,minimal load lookup object reloc \
  32                                         runtime sysdep error init fini)
  33 distribute      = $(rtld-routines:=.c) dynamic-link.h do-rel.h \
  34                   soinit.c sofini.c ldd.sh.in linux-compat.c
  35
  36 all: # Make this the default target; it will be defined in Rules.
  37
  38 include ../Makeconfig
  39
  40 ifeq (yes,$(build-shared))
  41 extra-objs      = $(rtld-routines:=.so) soinit.so sofini.so
  42 generated       = librtld.so dl-allobjs.so
  43 install-others  = $(slibdir)/$(rtld-installed-name)
  44 install-bin     = ldd
  45
  46 # Make sure this is built in the `make lib' pass so it can be used
  47 # to run programs during the `make others' pass.
  48 subdir_lib: $(objpfx)ld.so
  49
  50 ifneq (,$(filter linux%,$(config-os)))
  51 extra-objs      += linux-compat.so
  52 install-others  += $(slibdir)/ld-linux.so.1
  53 subdir_lib: $(objpfx)ld-linux.so.1
  54 endif
  55 endif
  56
  57 include ../Rules
  58
  59
  60 # Command to link into a larger single relocatable object.
  61 reloc-link = $(LINK.o) -nostdlib -nostartfiles -r -o $@
  62
  63 $(objpfx)dl-allobjs.so: $(rtld-routines:%=$(objpfx)%.so)
  64         $(reloc-link) $^
  65
  66 # Link together the dynamic linker into a single relocatable object.
  67 # We use this to produce both the ABI-compliant and Linux-compatible
  68 # dynamic linker shared objects below.
  69 $(objpfx)librtld.so: $(objpfx)dl-allobjs.so \
  70                      $(patsubst %,$(common-objpfx)lib%_pic.a,\
  71                                 elf c $(LDLIBS-c.so:-l%=%))
  72         $(reloc-link) '-Wl,-(' $^ -lgcc '-Wl,-)'
  73
  74 $(objpfx)ld.so: $(objpfx)librtld.so
  75         $(rtld-link) -Wl,-soname=$(rtld-installed-name)
  76 $(objpfx)ld-linux.so.1: $(objpfx)librtld.so
  77         $(rtld-link) -Wl,-soname=ld-linux.so.1
  78
  79 define rtld-link
  80 $(LINK.o) -nostdlib -nostartfiles -shared -o $@ \
  81           -Wl,-rpath=$(default-rpath) $^
  82 endef
  83
  84 # The Linux-compatible dynamic linker shared object is just the same
  85 # with one object file of compatibility initialization code added.
  86 $(objpfx)ld-linux.so.1: $(objpfx)linux-compat.so
  87
  88
  89 $(objpfx)libdl.so: $(objpfx)libdl_pic.a $(common-objpfx)libc.so $(objpfx)ld.so
  90         $(patsubst %/,cd %;,$(objpfx)) \
  91         $(LINK.o) -shared -o $(@:$(objpfx)%=%) \
  92                   $(LDFLAGS.so) $(LDFLAGS-dl.so) \
  93                   -Wl,--whole-archive $(^:$(objpfx)%=%) $(no-whole-archive)
  94
  95 $(slibdir)/$(rtld-installed-name): $(objpfx)ld.so; $(do-install-program)
  96 $(slibdir)/ld-linux.so.1: $(objpfx)ld-linux.so.1; $(do-install-program)
  97
  98 $(objpfx)ldd: ldd.sh.in Makefile
  99         sed 's%@RTLD@%$(slibdir)/$(rtld-installed-name)%g' < $< > $@.new
 100         chmod 555 $@.new
 101         mv -f $@.new $@