elf/Makefile

   1 # Makefile for elf subdirectory of GNU C Library.
   2
   3 # Copyright (C) 1995, 1996, 1997 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 not,
  18 # write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
  19 # Boston, MA 02111-1307, 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                   dl-version 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 ldd.bash.in eval.c
  39
  40 extra-libs       = libdl
  41 extra-libs-others = $(extra-libs)
  42 libdl-routines  := dlopen dlclose dlsym dlvsym dlerror dladdr
  43
  44 before-compile = $(objpfx)trusted-dirs.h
  45
  46
  47 all: # Make this the default target; it will be defined in Rules.
  48
  49 include ../Makeconfig
  50
  51 ifeq (yes,$(build-shared))
  52 extra-objs      = $(rtld-routines:=.so) soinit.so sofini.so eval.so
  53 generated       = librtld.so dl-allobjs.so
  54 install-others  = $(inst_slibdir)/$(rtld-installed-name)
  55 install-bin     = ldd
  56 endif
  57
  58 ifeq (yes,$(has-ldconfig))
  59 extra-objs      += ldconfig.o
  60 install-rootsbin = ldconfig
  61
  62 $(objpfx)ldconfig: $(objpfx)ldconfig.o
  63         $(CC) -nostdlib -nostartfiles -o $@ $(sysdep-LDFLAGS) -static         \
  64               $(addprefix $(csu-objpfx),start.o) $(+preinit)                  \
  65               $(filter-out $(addprefix $(csu-objpfx),start.o) $(+preinit)     \
  66                 $(link-extra-libs) $(common-objpfx)libc% $(+postinit),$^)     \
  67               $(link-extra-libs) $(common-objpfx)libc.a $(gnulib) $(+postinit)
  68 endif
  69
  70 include ../Rules
  71
  72
  73 ifeq (yes,$(build-shared))
  74 # Make sure these things are built in the `make lib' pass so they can be used
  75 # to run programs during the `make others' pass.
  76 lib-noranlib: $(objpfx)$(rtld-installed-name) \
  77               $(addprefix $(objpfx),$(extra-objs))
  78 endif
  79
  80 # Command to link into a larger single relocatable object.
  81 reloc-link = $(LINK.o) -nostdlib -nostartfiles -r -o $@
  82
  83 $(objpfx)dl-allobjs.so: $(rtld-routines:%=$(objpfx)%.so)
  84         $(reloc-link) $^
  85
  86 # Link together the dynamic linker into a single relocatable object.
  87 $(objpfx)librtld.so: $(objpfx)dl-allobjs.so $(common-objpfx)libc_pic.a
  88         $(reloc-link) '-Wl,-(' $^ -lgcc '-Wl,-)'
  89
  90 $(objpfx)ld.so: $(objpfx)librtld.so
  91         $(rtld-link) -Wl,-soname=$(rtld-installed-name)
  92
  93 define rtld-link
  94 $(LINK.o) -nostdlib -nostartfiles -shared -o $@ \
  95           -Wl,-rpath=$(default-rpath) $^
  96 endef
  97
  98 # The dl code in the static libc needs a default library path.
  99 CFLAGS-dl-support.c = -D'DEFAULT_RPATH="$(default-rpath)"'
 100
 101 ifneq (ld.so,$(rtld-installed-name))
 102 # Make sure ld.so.1 exists in the build directory so we can link
 103 # against it.
 104 $(objpfx)$(rtld-installed-name): $(objpfx)ld.so
 105         rm -f $@
 106         ln -s $(<F) $@
 107 endif
 108
 109 # Build a file mentioning all trustworthy directories to look for shared
 110 # libraries when using LD_LIBRARY_PATH in a setuid program.  The user can
 111 # add directories to the list by defining $(user-defined-trusted-dirs)
 112 # before starting make.
 113 $(objpfx)trusted-dirs.h: Makefile
 114         $(make-target-directory)
 115         (for dir in `echo "$(default-rpath) $(user-defined-trusted-dirs)" |   \
 116                      sed 's/:/ /g'`; do                                       \
 117            echo "  \"$$dir\",";                                               \
 118          done;) > $@T
 119         mv -f $@T $@
 120 CPPFLAGS-dl-load.c = -I$(objdir)/$(subdir)
 121 CFLAGS-dl-load.c += -Wno-uninitialized
 122
 123 # Specify the dependencies of libdl.so; its commands come from the generic
 124 # rule to build a shared library.
 125 $(objpfx)libdl.so: $(objpfx)libdl_pic.a $(common-objpfx)libc.so $(objpfx)ld.so
 126
 127 $(inst_slibdir)/$(rtld-version-installed-name): $(objpfx)ld.so
 128         $(do-install-program)
 129
 130 $(inst_slibdir)/$(rtld-installed-name): \
 131   $(inst_slibdir)/$(rtld-version-installed-name)
 132         $(make-shlib-link)
 133
 134 ifneq ($(have-bash2),yes)
 135 $(objpfx)ldd: ldd.sh.in $(common-objpfx)version.mk \
 136               $(common-objpfx)soversions.mk $(common-objpfx)config.make
 137         sed -e 's%@RTLD@%$(slibdir)/$(rtld-installed-name)%g' \
 138             -e 's%@VERSION@%$(version)%g' < $< > $@.new
 139         chmod 555 $@.new
 140         mv -f $@.new $@
 141 else
 142 $(objpfx)ldd: ldd.bash.in $(common-objpfx)version.mk \
 143               $(common-objpfx)soversions.mk $(common-objpfx)config.make
 144         sed -e 's%@BASH@%$(BASH)%g' \
 145             -e 's%@RTLD@%$(slibdir)/$(rtld-installed-name)%g' \
 146             -e 's%@VERSION@%$(version)%g' \
 147             -e 's%@TEXTDOMAINDIR@%$(localedir)%g' < $< > $@.new
 148         chmod 555 $@.new
 149         mv -f $@.new $@
 150 endif
 151 \f
 152 # muwahaha
 153
 154 LDFLAGS-dl.so = -Wl,-dynamic-linker,$(slibdir)/$(rtld-installed-name)
 155 $(objpfx)libdl.so: $(objpfx)eval.so