1# relocatable.m4 serial 17 2dnl Copyright (C) 2003, 2005-2007, 2009-2011 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 : ${RELOCATABLE_CONFIG_H_DIR='$(top_builddir)'} 18 RELOCATABLE_SRC_DIR="\$(top_srcdir)/$gl_source_base" 19 RELOCATABLE_BUILD_DIR="\$(top_builddir)/$gl_source_base" 20]) 21dnl The guts of gl_RELOCATABLE. Needs to be expanded only once. 22AC_DEFUN([gl_RELOCATABLE_BODY], 23[ 24 AC_REQUIRE([AC_PROG_INSTALL]) 25 dnl This AC_BEFORE invocation leads to unjustified autoconf warnings 26 dnl when gl_RELOCATABLE_BODY is invoked more than once. 27 dnl We need this AC_BEFORE because AC_PROG_INSTALL is documented to 28 dnl overwrite earlier settings of INSTALL and INSTALL_PROGRAM (even 29 dnl though in autoconf-2.52..2.60 it doesn't do so), but we want this 30 dnl macro's setting of INSTALL_PROGRAM to persist. 31 AC_BEFORE([AC_PROG_INSTALL],[gl_RELOCATABLE_BODY]) 32 AC_REQUIRE([AC_LIB_LIBPATH]) 33 AC_REQUIRE([gl_RELOCATABLE_LIBRARY_BODY]) 34 is_noop=no 35 use_elf_origin_trick=no 36 use_wrapper=no 37 if test $RELOCATABLE = yes; then 38 # --enable-relocatable implies --disable-rpath 39 enable_rpath=no 40 AC_CHECK_HEADERS([mach-o/dyld.h]) 41 AC_CHECK_FUNCS([_NSGetExecutablePath]) 42 case "$host_os" in 43 mingw*) is_noop=yes ;; 44 linux*) use_elf_origin_trick=yes ;; 45 esac 46 if test $is_noop = yes; then 47 RELOCATABLE_LDFLAGS=: 48 AC_SUBST([RELOCATABLE_LDFLAGS]) 49 else 50 if test $use_elf_origin_trick = yes; then 51 dnl Use the dynamic linker's support for relocatable programs. 52 case "$ac_aux_dir" in 53 /*) reloc_ldflags="$ac_aux_dir/reloc-ldflags" ;; 54 *) reloc_ldflags="\$(top_builddir)/$ac_aux_dir/reloc-ldflags" ;; 55 esac 56 RELOCATABLE_LDFLAGS="\"$reloc_ldflags\" \"\$(host)\" \"\$(RELOCATABLE_LIBRARY_PATH)\"" 57 AC_SUBST([RELOCATABLE_LDFLAGS]) 58 else 59 use_wrapper=yes 60 dnl Unfortunately we cannot define INSTALL_PROGRAM to a command 61 dnl consisting of more than one word - libtool doesn't support this. 62 dnl So we abuse the INSTALL_PROGRAM_ENV hook, originally meant for the 63 dnl 'install-strip' target. 64 INSTALL_PROGRAM_ENV="RELOC_LIBRARY_PATH_VAR=\"$shlibpath_var\" RELOC_LIBRARY_PATH_VALUE=\"\$(RELOCATABLE_LIBRARY_PATH)\" RELOC_PREFIX=\"\$(prefix)\" RELOC_DESTDIR=\"\$(DESTDIR)\" 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_STRIP_PROG=\"\$(RELOCATABLE_STRIP)\" RELOC_INSTALL_PROG=\"$INSTALL_PROGRAM\"" 65 AC_SUBST([INSTALL_PROGRAM_ENV]) 66 case "$ac_aux_dir" in 67 /*) INSTALL_PROGRAM="$ac_aux_dir/install-reloc" ;; 68 *) INSTALL_PROGRAM="\$(top_builddir)/$ac_aux_dir/install-reloc" ;; 69 esac 70 fi 71 fi 72 fi 73 AM_CONDITIONAL([RELOCATABLE_VIA_LD], 74 [test $is_noop = yes || test $use_elf_origin_trick = yes]) 75 AM_CONDITIONAL([RELOCATABLE_VIA_WRAPPER], [test $use_wrapper = yes]) 76 77 dnl RELOCATABLE_LIBRARY_PATH can be set in configure.ac. Default is empty. 78 AC_SUBST([RELOCATABLE_LIBRARY_PATH]) 79 80 AC_SUBST([RELOCATABLE_CONFIG_H_DIR]) 81 AC_SUBST([RELOCATABLE_SRC_DIR]) 82 AC_SUBST([RELOCATABLE_BUILD_DIR]) 83 84 dnl Ensure RELOCATABLE_STRIP is defined in Makefiles (at least those 85 dnl generated by automake), with value ':'. 86 RELOCATABLE_STRIP=':' 87 AC_SUBST([RELOCATABLE_STRIP]) 88]) 89 90dnl Determine the platform dependent parameters needed to use relocatability: 91dnl shlibpath_var. 92AC_DEFUN([AC_LIB_LIBPATH], 93[ 94 AC_REQUIRE([AC_LIB_PROG_LD]) dnl we use $LD 95 AC_REQUIRE([AC_CANONICAL_HOST]) dnl we use $host 96 AC_REQUIRE([AC_CONFIG_AUX_DIR_DEFAULT]) dnl we use $ac_aux_dir 97 AC_CACHE_CHECK([for shared library path variable], [acl_cv_libpath], [ 98 LD="$LD" \ 99 ${CONFIG_SHELL-/bin/sh} "$ac_aux_dir/config.libpath" "$host" > conftest.sh 100 . ./conftest.sh 101 rm -f ./conftest.sh 102 acl_cv_libpath=${acl_cv_shlibpath_var:-none} 103 ]) 104 shlibpath_var="$acl_cv_shlibpath_var" 105]) 106