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 elfclass.h link.h dlfcn.h
  24 routines        = $(dl-routines) dl-open dl-close dl-symbol dl-support \
  25                   enbl-secure
  26
  27 # The core dynamic linking functions are in libc for the static and
  28 # profiled libraries.
  29 dl-routines     = $(addprefix dl-,load cache lookup object reloc deps \
  30                                   runtime error init fini debug)
  31 # But they are absent from the shared libc, because that code is in ld.so.
  32 elide-routines.so = $(dl-routines) dl-support enbl-secure
  33
  34 # ld.so uses those routines, plus some special stuff for being the program
  35 # interpreter and operating independent of libc.
  36 rtld-routines   := rtld $(dl-routines) dl-sysdep dl-minimal
  37 distribute      = $(rtld-routines:=.c) dynamic-link.h do-rel.h dl-machine.h \
  38                   soinit.c sofini.c ldd.sh.in eval.c
  39
  40 extra-libs       = libdl
  41 extra-libs-others = $(extra-libs)
  42 libdl-routines  := dlopen dlclose dlsym dlerror dladdr
  43
  44
  45 all: # Make this the default target; it will be defined in Rules.
  46
  47 include ../Makeconfig
  48
  49 ifeq (yes,$(build-shared))
  50 extra-objs      = $(rtld-routines:=.so) soinit.so sofini.so eval.so
  51 generated       = librtld.so dl-allobjs.so
  52 install-others  = $(slibdir)/$(rtld-installed-name)
  53 install-bin     = ldd
  54 endif
  55
  56 include ../Rules
  57
  58
  59 ifeq (yes, $(build-shared))
  60 # Make sure these things are built in the `make lib' pass so they can be used
  61 # to run programs during the `make others' pass.
  62 lib-noranlib: $(objpfx)$(rtld-installed-name) \
  63               $(addprefix $(objpfx),$(extra-objs))
  64 endif
  65
  66 # Command to link into a larger single relocatable object.
  67 reloc-link = $(LINK.o) -nostdlib -nostartfiles -r -o $@
  68
  69 $(objpfx)dl-allobjs.so: $(rtld-routines:%=$(objpfx)%.so)
  70         $(reloc-link) $^
  71
  72 # Link together the dynamic linker into a single relocatable object.
  73 $(objpfx)librtld.so: $(objpfx)dl-allobjs.so $(common-objpfx)libc_pic.a
  74         $(reloc-link) '-Wl,-(' $^ -lgcc '-Wl,-)'
  75
  76 $(objpfx)ld.so: $(objpfx)librtld.so
  77         $(rtld-link) -Wl,-soname=$(rtld-installed-name)
  78
  79 define rtld-link
  80 $(LINK.o) -nostdlib -nostartfiles -shared -o $@ \
  81           -Wl,-rpath=$(default-rpath) $^
  82 endef
  83
  84 # The dl code in the static libc needs a default library path.
  85 CFLAGS-dl-support.c = -D'DEFAULT_RPATH="$(default-rpath)"'
  86
  87 ifneq (ld.so, $(rtld-installed-name))
  88 # Make sure ld-gnu.so.1 exists in the build directory so we can link
  89 # against it.
  90 $(objpfx)$(rtld-installed-name): $(objpfx)ld.so
  91         rm -f $@
  92         ln -s $(<F) $@
  93 endif
  94
  95
  96 # Specify the dependencies of libdl.so; its commands come from the generic
  97 # rule to build a shared library.
  98 $(objpfx)libdl.so: $(objpfx)libdl_pic.a $(common-objpfx)libc.so $(objpfx)ld.so
  99
 100 $(slibdir)/$(rtld-installed-name): $(objpfx)ld.so; $(do-install-program)
 101
 102 $(objpfx)ldd: ldd.sh.in Makefile
 103         sed 's%@RTLD@%$(slibdir)/$(rtld-installed-name)%g' < $< > $@.new
 104         chmod 555 $@.new
 105         mv -f $@.new $@
 106 \f
 107 # muwahaha
 108
 109 LDFLAGS-dl.so = -Wl,-dynamic-linker,$(slibdir)/$(rtld-installed-name)
 110 $(objpfx)libdl.so: $(objpfx)eval.so