patch_libtool_sys_lib_search_path_spec

Cross-compiling to win32 from a unix system reveals a bug - the path-separator has been set to ";" depending on the target system. However, the crossgcc search_path_spec works in a unix-environment with unix-style directories and unix-stylish path_separator. The result: the search_path_spec is a single word still containing the ":" separators.

This macro fixes the situation: when we see the libtool PATH_SEP to be ":" and search_path_spec to contain ":" characters, then these are replaced with spaces to let the resulting string work as a for-loop argument in libtool scripts that resolve -no-undefined libraries.

Later libtool generations have fixed the situation with using $PATH_SEPARATOR in the first place as the original path delimiter that will be scanned for and replaced into spaces.

AC_DEFUN([PATCH_LIBTOOL_SYS_LIB_SEARCH_PATH_SPEC],
[# patch libtool to fix sys_lib_search_path (e.g. crosscompiling a win32 dll)
if test "_$PATH_SEPARATOR" = "_:" ; then
  if grep "^sys_lib_search_path_spec.*:" libtool >/dev/null ; then
AC_MSG_RESULT(patching libtool to fix sys_lib_search_path_spec)
    test -f libtool.old || (mv libtool libtool.old && cp libtool.old libtool)
    sed -e "/^sys_lib_search_path_spec/s/:/ /g" libtool >libtool.new
    (test -s libtool.new || rm libtool.new) 2>/dev/null
    test -f libtool.new && mv libtool.new libtool # not 2>/dev/null !!
    test -f libtool     || mv libtool.old libtool
  fi
fi
])

Copyright © 2006 Guido U. Draheim <guidod@gmx.de>

This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 2 of the License, or (at your option) any later version.

This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.

You should have received a copy of the GNU General Public License along with this program; if not, write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.

As a special exception, the respective Autoconf Macro's copyright owner gives unlimited permission to copy, distribute and modify the configure scripts that are the output of Autoconf when processing the Macro. You need not follow the terms of the GNU General Public License when using or distributing such scripts, even though portions of the text of the Macro appear in them. The GNU General Public License (GPL) does govern all other use of the material that constitutes the Autoconf Macro.

This special exception to the GPL applies to versions of the Autoconf Macro released by the Autoconf Macro Archive. When you make and distribute a modified version of the Autoconf Macro, you may extend this special exception to the GPL to apply to your modified version as well.