1# relocatable.m4 serial 11 2dnl Copyright (C) 2003, 2005-2007 Free Software Foundation, Inc. 3dnl This file is free software; the Free Software Foundation 4dnl gives unlimited permission to copy and/or distribute it, 5dnl with or without modifications, as long as this notice is preserved. 6 7dnl From Bruno Haible. 8 9dnl gl_RELOCATABLE([RELOCWRAPPER-DIR]) 10dnl ---------------------------------------------------------- 11dnl Support for relocatable programs. 12dnl Supply RELOCWRAPPER-DIR as the directory where relocwrapper.c may be found. 13AC_DEFUN([gl_RELOCATABLE], 14[ 15 AC_REQUIRE([gl_RELOCATABLE_BODY]) 16 gl_RELOCATABLE_LIBRARY 17 if test $RELOCATABLE = yes; then 18 AC_LIBOBJ([progreloc]) 19 fi 20 : ${RELOCATABLE_CONFIG_H_DIR='$(top_builddir)'} 21 RELOCATABLE_SRC_DIR="\$(top_srcdir)/$gl_source_base" 22 RELOCATABLE_BUILD_DIR="\$(top_builddir)/$gl_source_base" 23]) 24dnl The guts of gl_RELOCATABLE. Needs to be expanded only once. 25AC_DEFUN([gl_RELOCATABLE_BODY], 26[ 27 AC_REQUIRE([AC_PROG_INSTALL]) 28 dnl This AC_BEFORE invocation leads to unjustified autoconf warnings 29 dnl when gl_RELOCATABLE_BODY is invoked more than once. 30 dnl We need this AC_BEFORE because AC_PROG_INSTALL is documented to 31 dnl overwrite earlier settings of INSTALL and INSTALL_PROGRAM (even 32 dnl though in autoconf-2.52..2.60 it doesn't do so), but we want this 33 dnl macro's setting of INSTALL_PROGRAM to persist. 34 AC_BEFORE([AC_PROG_INSTALL],[gl_RELOCATABLE_BODY]) 35 AC_REQUIRE([AC_LIB_LIBPATH]) 36 AC_REQUIRE([gl_RELOCATABLE_LIBRARY_BODY]) 37 is_noop=no 38 use_elf_origin_trick=no 39 if test $RELOCATABLE = yes; then 40 # --enable-relocatable implies --disable-rpath 41 enable_rpath=no 42 AC_CHECK_HEADERS([mach-o/dyld.h]) 43 AC_CHECK_FUNCS([_NSGetExecutablePath]) 44 case "$host_os" in 45 mingw*) is_noop=yes ;; 46 linux*) use_elf_origin_trick=yes ;; 47 esac 48 if test $is_noop = yes; then 49 RELOCATABLE_LDFLAGS=: 50 AC_SUBST([RELOCATABLE_LDFLAGS]) 51 else 52 if test $use_elf_origin_trick = yes; then 53 dnl Use the dynamic linker's support for relocatable programs. 54 case "$ac_aux_dir" in 55 /*) reloc_ldflags="$ac_aux_dir/reloc-ldflags" ;; 56 *) reloc_ldflags="\$(top_builddir)/$ac_aux_dir/reloc-ldflags" ;; 57 esac 58 RELOCATABLE_LDFLAGS="\"$reloc_ldflags\" \"\$(host)\" \"\$(RELOCATABLE_LIBRARY_PATH)\"" 59 AC_SUBST([RELOCATABLE_LDFLAGS]) 60 else 61 dnl Unfortunately we cannot define INSTALL_PROGRAM to a command 62 dnl consisting of more than one word - libtool doesn't support this. 63 dnl So we abuse the INSTALL_PROGRAM_ENV hook, originally meant for the 64 dnl 'install-strip' target. 65 INSTALL_PROGRAM_ENV="RELOC_LIBRARY_PATH_VAR=\"$shlibpath_var\" RELOC_LIBRARY_PATH_VALUE=\"\$(RELOCATABLE_LIBRARY_PATH)\" RELOC_PREFIX=\"\$(prefix)\" RELOC_COMPILE_COMMAND=\"\$(CC) \$(CPPFLAGS) \$(CFLAGS) \$(LDFLAGS)\" RELOC_SRCDIR=\"\$(RELOCATABLE_SRC_DIR)\" RELOC_BUILDDIR=\"\$(RELOCATABLE_BUILD_DIR)\" RELOC_CONFIG_H_DIR=\"\$(RELOCATABLE_CONFIG_H_DIR)\" RELOC_EXEEXT=\"\$(EXEEXT)\" RELOC_INSTALL_PROG=\"$INSTALL_PROGRAM\"" 66 AC_SUBST([INSTALL_PROGRAM_ENV]) 67 case "$ac_aux_dir" in 68 /*) INSTALL_PROGRAM="$ac_aux_dir/install-reloc" ;; 69 *) INSTALL_PROGRAM="\$(top_builddir)/$ac_aux_dir/install-reloc" ;; 70 esac 71 fi 72 fi 73 fi 74 AM_CONDITIONAL([RELOCATABLE_VIA_LD], 75 [test $is_noop = yes || test $use_elf_origin_trick = yes]) 76 77 dnl RELOCATABLE_LIBRARY_PATH can be set in configure.ac. Default is empty. 78 AC_SUBST([RELOCATABLE_LIBRARY_PATH]) 79 AC_SUBST([RELOCATABLE_CONFIG_H_DIR]) 80 AC_SUBST([RELOCATABLE_SRC_DIR]) 81 AC_SUBST([RELOCATABLE_BUILD_DIR]) 82]) 83 84dnl Determine the platform dependent parameters needed to use relocatability: 85dnl shlibpath_var. 86AC_DEFUN([AC_LIB_LIBPATH], 87[ 88 AC_REQUIRE([AC_LIB_PROG_LD]) dnl we use $LD 89 AC_REQUIRE([AC_CANONICAL_HOST]) dnl we use $host 90 AC_REQUIRE([AC_CONFIG_AUX_DIR_DEFAULT]) dnl we use $ac_aux_dir 91 AC_CACHE_CHECK([for shared library path variable], acl_cv_libpath, [ 92 LD="$LD" \ 93 ${CONFIG_SHELL-/bin/sh} "$ac_aux_dir/config.libpath" "$host" > conftest.sh 94 . ./conftest.sh 95 rm -f ./conftest.sh 96 acl_cv_libpath=${acl_cv_shlibpath_var:-none} 97 ]) 98 shlibpath_var="$acl_cv_shlibpath_var" 99]) 100