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<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01//EN"
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Autoconf Macro: adl_func_getopt_long
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<h1>
adl_func_getopt_long
</h1>
<h2>
Synopsis
</h2>
<p class="indent" style="white-space:nowrap;">
<code>adl_FUNC_GETOPT_LONG</code>
</p>
<h2>
Description
</h2>
<div class="indent">
<p>
Check for getopt_long support.
</p>
<p>
This assume that the standard getopt.h file (from GNU libc) is available as
lib/gnugetopt.h. If needed, this file will be linked as getopt.h, but we
want to default to the system's getopt.h file. (See
http://sources.redhat.com/ml/automake/2000-09/msg00041.html for an
explanation about why using the system's getopt.h file is important.)
</p>
</div>
<h2>
Author
</h2>
<p class="indent">
Alexandre Duret-Lutz <adl@gnu.org>
</p>
<h2>
Last Modified
</h2>
<p class="indent">
2003-10-29
</p>
<h2>
M4 Source Code
</h2>
<div class="indent">
<pre class="m4source">
AC_DEFUN([adl_FUNC_GETOPT_LONG],
[AC_PREREQ(2.49)dnl
# clean out junk possibly left behind by a previous configuration
rm -f lib/getopt.h
# Check for getopt_long support
AC_CHECK_HEADERS([getopt.h])
AC_CHECK_FUNCS([getopt_long],,
[# FreeBSD has a gnugetopt library for this
AC_CHECK_LIB([gnugetopt],[getopt_long],[AC_DEFINE([HAVE_GETOPT_LONG])],
[# use the GNU replacement
AC_LIBOBJ(getopt)
AC_LIBOBJ(getopt1)
AC_CONFIG_LINKS([lib/getopt.h:lib/gnugetopt.h])])])])
</pre>
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