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annotate build-aux/reloc-ldflags @ 40206:770a5696761e

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relocatable-prog: Use wrapper-free installation on Mac OS X, take 2. This approach supports relocatable installation of shared libraries which depend on other shared libraries from the same package. * m4/relocatable.m4 (gl_RELOCATABLE_BODY): Determine use_macos_tools. If use_macos_tools is true, use reloc-ldflags and set LIBTOOL to be a wrapper around the original LIBTOOL. * build-aux/reloc-ldflags: Add support for Mac OS X, which uses the token '@loader_path' instead of '$ORIGIN'. * build-aux/libtool-reloc: New file. * modules/relocatable-prog (Files): Add it. * doc/relocatable-maint.texi (Supporting Relocation): Update to match the recent changes. Document the need to set the *_LDFLAGS of libraries. RELOCATABLE_LIBRARY_PATH and RELOCATABLE_CONFIG_H_DIR should be set in Makefile.am, not in configure.ac.
author Bruno Haible <bruno@clisp.org>
date Mon, 04 Mar 2019 17:25:09 +0100
parents ef116535bf1a
children
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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1 #! /bin/sh
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2 # Output a system dependent linker command for putting a relocatable library
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3 # search path into an executable.
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4 #
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5 # Copyright 2003-2019 Free Software Foundation, Inc.
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6 # Written by Bruno Haible <bruno@clisp.org>, 2003.
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7 #
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8 # This program is free software: you can redistribute it and/or modify
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9 # it under the terms of the GNU General Public License as published by
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10 # the Free Software Foundation; either version 3 of the License, or
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11 # (at your option) any later version.
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12 #
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13 # This program is distributed in the hope that it will be useful,
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14 # but WITHOUT ANY WARRANTY; without even the implied warranty of
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15 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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16 # GNU General Public License for more details.
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17 #
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18 # You should have received a copy of the GNU General Public License
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19 # along with this program. If not, see <https://www.gnu.org/licenses/>.
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20 #
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21 # As a special exception to the GNU General Public License, if you
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22 # distribute this file as part of a program that contains a
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23 # configuration script generated by Autoconf, you may include it under
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24 # the same distribution terms that you use for the rest of that program.
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25 #
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26 # The first argument passed to this file is the canonical host specification,
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27 # CPU_TYPE-MANUFACTURER-OPERATING_SYSTEM
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28 # or
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29 # CPU_TYPE-MANUFACTURER-KERNEL-OPERATING_SYSTEM
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30 # The environment variable LD should be set by the caller.
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31 #
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32 # The second argument is a colon separated list of directories that contain
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33 # the libraries at installation time.
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34 #
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35 # The third argument is the directory into which the executable is going to be
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36 # installed.
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37
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38 host="$1"
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39 host_cpu=`echo "$host" | sed 's/^\([^-]*\)-\([^-]*\)-\(.*\)$/\1/'`
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40 host_vendor=`echo "$host" | sed 's/^\([^-]*\)-\([^-]*\)-\(.*\)$/\2/'`
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41 host_os=`echo "$host" | sed 's/^\([^-]*\)-\([^-]*\)-\(.*\)$/\3/'`
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42
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43 library_path_value=$2
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44
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45 installdir=$3
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46
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47 # Verify that installdir is absolute.
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48 case "$installdir" in
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49 /*) ;;
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50 *)
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51 echo "installdir is not absolute: $installdir" 1>&2
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52 exit 1
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53 ;;
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54 esac
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55
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56 origin_token=
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57 case "$host_os" in
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58 linux* | gnu* | kfreebsd* | \
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59 freebsd* | dragonfly* | \
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60 netbsd* | \
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61 openbsd* | \
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62 solaris* | \
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63 haiku*)
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64 origin_token='$ORIGIN'
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65 ;;
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66 darwin*)
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67 origin_token='@loader_path'
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68 ;;
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69 esac
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70 if test -n "$origin_token"; then
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71 rpath=
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72 save_IFS="$IFS"; IFS=":"
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73 for dir in $library_path_value; do
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74 IFS="$save_IFS"
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75 case "$dir" in
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76 /*)
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77 # Make dir relative to installdir. (Works only if dir is absolute.)
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78 idir="$installdir"
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79 while true; do
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80 dfirst=`echo "$dir" | sed -n -e 's,^//*\([^/]*\).*$,/\1,p'`
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81 ifirst=`echo "$idir" | sed -n -e 's,^//*\([^/]*\).*$,/\1,p'`
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82 if test -z "$dfirst" || test -z "$ifirst"; then
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83 break
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84 fi
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85 if test "$dfirst" != "$ifirst"; then
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86 break
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87 fi
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88 dir=`echo "$dir" | sed -e 's,^//*[^/]*,,'`
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89 idir=`echo "$idir" | sed -e 's,^//*[^/]*,,'`
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90 done
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91 dir="$origin_token"`echo "$idir" | sed -e 's,//*[^/]*,/..,g'`"$dir"
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92 # Add dir to rpath.
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93 rpath="${rpath}${rpath:+ }$dir"
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94 ;;
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95 *)
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96 if test -n "$dir"; then
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97 echo "libdir is not absolute: $dir" 1>&2
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98 fi
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99 ;;
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100 esac
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101 done
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102 IFS="$save_IFS"
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103 # Output it.
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104 if test -n "$rpath"; then
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105 case "$host_os" in
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106 # At least some versions of FreeBSD, DragonFly, and OpenBSD need the
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107 # linker option "-z origin". See <https://lekensteyn.nl/rpath.html>.
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108 freebsd* | dragonfly* | openbsd*)
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109 echo "-Wl,-z,origin -Wl,-rpath,$rpath" ;;
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110 *)
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111 echo "-Wl,-rpath,$rpath" ;;
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112 esac
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113 fi
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114 else
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115 echo "relocation via rpath not supported on this system: $host" 1>&2
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116 exit 1
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117 fi
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118
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119 exit 0