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Autoconf Macro: patch_libtool_sys_lib_search_path_spec
</title>
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<h1>
patch_libtool_sys_lib_search_path_spec
</h1>
<h2>
Synopsis
</h2>
<p class="indent" style="white-space:nowrap;">
<code>PATCH_LIBTOOL_SYS_LIB_SEARCH_PATH_SPEC</code>
</p>
<h2>
Description
</h2>
<div class="indent">
<p>
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.
</p>
<p>
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.
</p>
<p>
Later libtool generations have fixed the situation with using
$PATH_SEPARATOR in the first place as the original path delimiter that will
be scanned for and replaced into spaces.
</p>
</div>
<h2>
Author
</h2>
<p class="indent">
Guido Draheim <guidod@gmx.de>
</p>
<h2>
Last Modified
</h2>
<p class="indent">
2005-01-21
</p>
<h2>
M4 Source Code
</h2>
<div class="indent">
<pre class="m4source">
AC_DEFUN([PATCH_LIBTOOL_SYS_LIB_SEARCH_PATH_SPEC],
[# patch libtool to fix sys_lib_search_path (e.g. crosscompiling a win32 dll)
if test "_$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
])
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