build-aux/libtool-reloc

   1 #!/bin/sh
   2 # libtool-reloc - libtool wrapper with support for relocatable programs
   3 # Copyright (C) 2019-2020 Free Software Foundation, Inc.
   4 # Written by Bruno Haible <bruno@clisp.org>, 2019.
   5 #
   6 # This program is free software: you can redistribute it and/or modify
   7 # it under the terms of the GNU General Public License as published by
   8 # the Free Software Foundation; either version 3 of the License, or
   9 # (at your option) any later version.
  10 #
  11 # This program is distributed in the hope that it will be useful,
  12 # but WITHOUT ANY WARRANTY; without even the implied warranty of
  13 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14 # GNU General Public License for more details.
  15 #
  16 # You should have received a copy of the GNU General Public License
  17 # along with this program.  If not, see <https://www.gnu.org/licenses/>.
  18
  19 # Usage: libtool-reloc libtool LIBTOOL_ARGUMENTS
  20
  21 # Outputs a command and runs it.
  22 func_verbose ()
  23 {
  24   # Make it easy to copy&paste the printed command into a shell in most cases,
  25   # by escaping '\\', '"', and '$'. This is not perfect, just good enough.
  26   echo "$@" | sed -e 's/\([\\"$]\)/\\\1/g'
  27   "$@"
  28 }
  29
  30 # Determine the mode from the arguments.
  31 mode=
  32 for arg
  33 do
  34   case "$arg" in
  35     --mode=link) mode=link ;;
  36   esac
  37 done
  38
  39 if test "$mode" = link; then
  40   # Determine the target from the arguments.
  41   target=
  42   next_is_target=false
  43   for arg
  44   do
  45     if $next_is_target; then
  46       target="$arg"
  47       next_is_target=false
  48     else
  49       case "$arg" in
  50         -o) next_is_target=true ;;
  51         *) next_is_target=false ;;
  52       esac
  53     fi
  54   done
  55   case "$target" in
  56     *.la)
  57       # When creating a library:
  58       # 1. Add a '-Wl,-rpath,@loader_path' option.
  59       #    (A '-R @loader_path' option does not work: libtool produces
  60       #    an error "error: only absolute run-paths are allowed".)
  61       #    (Also note that 'install_name_tool -add_rpath @loader_path ...'
  62       #    does not work on Mac OS X 10.5.)
  63       #    This is done through the RELOCATABLE_LDFLAGS macro.
  64       # 2. After creating the library, run
  65       #    install_name_tool -id @rpath/$dlname $target_dir/.libs/$dlname
  66       #    (This is easier than to modify the libtool script to emit a different
  67       #    install_name. Also, an option '-Wl,-install_name,@rpath/$dlname' does
  68       #    not work since libtool emits another option '-Wl,-install_name,...'
  69       #    after it.
  70       "$@" && {
  71         dlname_assignment=`grep '^dlname=' "$target"`
  72         dlname=
  73         eval "$dlname_assignment"
  74         # Nothing to do when --disable-shared was specified.
  75         if test -n "$dlname"; then
  76           target_dir=`dirname "$target"`
  77           if test -f "$target_dir/.libs/$dlname"; then
  78             func_verbose install_name_tool -id "@rpath/$dlname" "$target_dir/.libs/$dlname"
  79           fi
  80         fi
  81       }
  82       ;;
  83     *)
  84       "$@"
  85       ;;
  86   esac
  87 else
  88   "$@"
  89 fi