gnu/dist/gettext/build-aux/reloc-ldflags

   1 #! /bin/sh
   2 # Output a system dependent linker command for putting a relocatable library
   3 # search path into an executable.
   4 #
   5 #   Copyright 2003 Free Software Foundation, Inc.
   6 #   Written by Bruno Haible <bruno@clisp.org>, 2003.
   7 #
   8 #   This program is free software; you can redistribute it and/or modify
   9 #   it under the terms of the GNU General Public License as published by
  10 #   the Free Software Foundation; either version 2 of the License, or
  11 #   (at your option) any later version.
  12 #
  13 #   This program is distributed in the hope that it will be useful, but
  14 #   WITHOUT ANY WARRANTY; without even the implied warranty of
  15 #   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  16 #   General Public License for more details.
  17 #
  18 #   You should have received a copy of the GNU General Public License
  19 #   along with this program; if not, write to the Free Software
  20 #   Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
  21 #
  22 #   As a special exception to the GNU General Public License, if you
  23 #   distribute this file as part of a program that contains a
  24 #   configuration script generated by Autoconf, you may include it under
  25 #   the same distribution terms that you use for the rest of that program.
  26 #
  27 # The first argument passed to this file is the canonical host specification,
  28 #    CPU_TYPE-MANUFACTURER-OPERATING_SYSTEM
  29 # or
  30 #    CPU_TYPE-MANUFACTURER-KERNEL-OPERATING_SYSTEM
  31 # The environment variable LD should be set by the caller.
  32 #
  33 # The second argument is a colon separated list of directories that contain
  34 # the libraries at installation time.
  35 #
  36 # The third argument is the directory into which the executable is going to be
  37 # installed.
  38
  39 host="$1"
  40 host_cpu=`echo "$host" | sed 's/^\([^-]*\)-\([^-]*\)-\(.*\)$/\1/'`
  41 host_vendor=`echo "$host" | sed 's/^\([^-]*\)-\([^-]*\)-\(.*\)$/\2/'`
  42 host_os=`echo "$host" | sed 's/^\([^-]*\)-\([^-]*\)-\(.*\)$/\3/'`
  43
  44 library_path_value=$2
  45
  46 installdir=$3
  47
  48 # Verify that installdir is absolute.
  49 case "$installdir" in
  50   /*) ;;
  51   *)
  52     echo "installdir is not absolute: $installdir" 1>&2
  53     exit 1
  54     ;;
  55 esac
  56
  57 case "$host_os" in
  58   linux*) # Supported since Linux 2.1 and glibc 2.1.
  59     rpath=
  60     save_IFS="$IFS"; IFS=":"
  61     for dir in $library_path_value; do
  62       IFS="$save_IFS"
  63       case "$dir" in
  64         /*)
  65           # Make dir relative to installdir. (Works only if dir is absolute.)
  66           idir="$installdir"
  67           while true; do
  68             dfirst=`echo "$dir" | sed -n -e 's,^//*\([^/]*\).*$,/\1,p'`
  69             ifirst=`echo "$idir" | sed -n -e 's,^//*\([^/]*\).*$,/\1,p'`
  70             if test -z "$dfirst" || test -z "$ifirst"; then
  71               break
  72             fi
  73             if test "$dfirst" != "$ifirst"; then
  74               break
  75             fi
  76             dir=`echo "$dir" | sed -e 's,^//*[^/]*,,'`
  77             idir=`echo "$idir" | sed -e 's,^//*[^/]*,,'`
  78           done
  79           dir="\$ORIGIN"`echo "$idir" | sed -e 's,//*[^/]*,/..,g'`"$dir"
  80           # Add dir to rpath.
  81           rpath="${rpath}${rpath:+ }$dir"
  82           ;;
  83         *)
  84           if test -n "$dir"; then
  85             echo "libdir is not absolute: $dir" 1>&2
  86           fi
  87           ;;
  88       esac
  89     done
  90     IFS="$save_IFS"
  91     # Output it.
  92     if test -n "$rpath"; then
  93       echo "-Wl,-rpath,$rpath"
  94     fi
  95     ;;
  96   *)
  97     echo "relocation via rpath not supported on this system: $host" 1>&2
  98     exit 1
  99     ;;
 100 esac
 101
 102 exit 0