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annotate m4/relocatable.m4 @ 8265:20006894dae4

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Infrastructure for relocatable installation, from GNU gettext. See http://lists.gnu.org/archive/html/bug-gnulib/2003-03/msg00020.html
author Bruno Haible <bruno@clisp.org>
date Thu, 01 Mar 2007 01:15:40 +0000
parents
children fd48e35f4e5e
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8265
20006894dae4 Infrastructure for relocatable installation, from GNU gettext.
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1 # relocatable.m4 serial 7 (gettext-0.16)
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2 dnl Copyright (C) 2003, 2005-2006 Free Software Foundation, Inc.
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3 dnl This file is free software; the Free Software Foundation
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4 dnl gives unlimited permission to copy and/or distribute it,
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5 dnl with or without modifications, as long as this notice is preserved.
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6
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7 dnl From Bruno Haible.
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8
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9 dnl Support for relocateble programs.
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10 AC_DEFUN([AC_RELOCATABLE],
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11 [
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12 AC_REQUIRE([AC_RELOCATABLE_BODY])
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13 if test $RELOCATABLE = yes; then
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14 AC_LIBOBJ([relocatable])
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15 fi
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16 ])
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17 dnl The guts of AC_RELOCATABLE. Needs to be expanded only once.
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18 AC_DEFUN([AC_RELOCATABLE_BODY],
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19 [
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20 AC_REQUIRE([AC_PROG_INSTALL])
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21 dnl This AC_BEFORE invocation leads to unjustified autoconf warnings
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22 dnl when AC_RELOCATABLE_BODY is invoked more than once.
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23 dnl We need this AC_BEFORE because AC_PROG_INSTALL is documented to
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24 dnl overwrite earlier settings of INSTALL and INSTALL_PROGRAM (even
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25 dnl though in autoconf-2.52..2.60 it doesn't do so), but we want this
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26 dnl macro's setting of INSTALL_PROGRAM to persist.
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27 AC_BEFORE([AC_PROG_INSTALL],[AC_RELOCATABLE_BODY])
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28 AC_REQUIRE([AC_LIB_LIBPATH])
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29 AC_REQUIRE([AC_RELOCATABLE_LIBRARY])
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30 AC_REQUIRE([AC_EXEEXT])
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31 is_noop=no
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32 use_elf_origin_trick=no
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33 if test $RELOCATABLE = yes; then
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34 # --enable-relocatable implies --disable-rpath
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35 enable_rpath=no
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36 AC_DEFINE([ENABLE_RELOCATABLE], 1,
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37 [Define to 1 if the package shall run at any location in the filesystem.])
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38 AC_CHECK_HEADERS([unistd.h mach-o/dyld.h])
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39 AC_CHECK_FUNCS([_NSGetExecutablePath])
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40 case "$host_os" in
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41 mingw*) is_noop=yes ;;
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42 linux*) use_elf_origin_trick=yes ;;
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43 esac
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44 if test $is_noop = yes; then
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45 SET_RELOCATABLE="RELOCATABLE_LDFLAGS = :"
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46 else
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47 if test $use_elf_origin_trick = yes; then
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48 dnl Use the dynamic linker's support for relocatable programs.
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49 case "$ac_aux_dir" in
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50 /*) reloc_ldflags="$ac_aux_dir/reloc-ldflags" ;;
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51 *) reloc_ldflags="\$(top_builddir)/$ac_aux_dir/reloc-ldflags" ;;
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52 esac
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53 SET_RELOCATABLE="RELOCATABLE_LDFLAGS = \"$reloc_ldflags\" \"\$(host)\" \"\$(RELOCATABLE_LIBRARY_PATH)\""
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54 else
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55 dnl Unfortunately we cannot define INSTALL_PROGRAM to a command
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56 dnl consisting of more than one word - libtool doesn't support this.
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57 dnl So we abuse the INSTALL_PROGRAM_ENV hook, originally meant for the
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58 dnl 'install-strip' target.
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59 SET_RELOCATABLE="INSTALL_PROGRAM_ENV = RELOC_LIBRARY_PATH_VAR=\"$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=\"$INSTALL_PROGRAM\""
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60 case "$ac_aux_dir" in
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61 /*) INSTALL_PROGRAM="$ac_aux_dir/install-reloc" ;;
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62 *) INSTALL_PROGRAM="\$(top_builddir)/$ac_aux_dir/install-reloc" ;;
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63 esac
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64 fi
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65 fi
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66 else
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67 SET_RELOCATABLE=
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68 fi
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69 AC_SUBST([SET_RELOCATABLE])
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70 AM_CONDITIONAL([RELOCATABLE_VIA_LD],
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71 [test $is_noop = yes || test $use_elf_origin_trick = yes])
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72 ])
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73
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74 dnl Support for relocatable libraries.
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75 AC_DEFUN([AC_RELOCATABLE_LIBRARY],
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76 [
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77 AC_REQUIRE([AC_RELOCATABLE_NOP])
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78 dnl Easier to put this here once, instead of into the DEFS of each Makefile.
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79 if test "X$prefix" = "XNONE"; then
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80 reloc_final_prefix="$ac_default_prefix"
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81 else
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82 reloc_final_prefix="$prefix"
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83 fi
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84 AC_DEFINE_UNQUOTED([INSTALLPREFIX], ["${reloc_final_prefix}"],
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85 [Define to the value of ${prefix}, as a string.])
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86 ])
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87
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88 dnl Support for relocatable packages for which it is a nop.
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89 AC_DEFUN([AC_RELOCATABLE_NOP],
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90 [
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91 AC_MSG_CHECKING([whether to activate relocatable installation])
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92 AC_ARG_ENABLE(relocatable,
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93 [ --enable-relocatable install a package that can be moved in the filesystem],
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94 [if test "$enableval" != no; then
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95 RELOCATABLE=yes
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96 else
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97 RELOCATABLE=no
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98 fi
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99 ], RELOCATABLE=no)
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100 AC_SUBST(RELOCATABLE)
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101 AC_MSG_RESULT([$RELOCATABLE])
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102 ])
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103
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104 dnl Determine the platform dependent parameters needed to use relocatability:
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105 dnl shlibpath_var.
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106 AC_DEFUN([AC_LIB_LIBPATH],
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107 [
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108 AC_REQUIRE([AC_LIB_PROG_LD]) dnl we use $LD
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109 AC_REQUIRE([AC_CANONICAL_HOST]) dnl we use $host
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110 AC_REQUIRE([AC_CONFIG_AUX_DIR_DEFAULT]) dnl we use $ac_aux_dir
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111 AC_CACHE_CHECK([for shared library path variable], acl_cv_libpath, [
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112 LD="$LD" \
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113 ${CONFIG_SHELL-/bin/sh} "$ac_aux_dir/config.libpath" "$host" > conftest.sh
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114 . ./conftest.sh
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115 rm -f ./conftest.sh
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116 acl_cv_libpath=${acl_cv_shlibpath_var:-none}
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117 ])
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118 shlibpath_var="$acl_cv_shlibpath_var"
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119 ])