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Autoconf Macro: ac_lib_upnp
</title>
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<a href="http://autoconf-archive.cryp.to/ac_lib_upnp.m4">Download M4
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<hr>
<h1>
ac_lib_upnp
</h1>
<h2>
Synopsis
</h2>
<p class="indent" style="white-space:nowrap;">
<code>AC_LIB_UPNP([ACTION-IF-TRUE], [ACTION-IF-FALSE])</code>
</p>
<h2>
Description
</h2>
<div class="indent">
<p>
This macro will check for the existence of libupnp
(http://upnp.sourceforge.net/). It does this by checking for the header
file upnp.h and the upnp library object file. A --with-libupnp option is
supported as well. The following output variables are set with AC_SUBST:
</p>
<pre>
UPNP_CPPFLAGS
UPNP_LDFLAGS
UPNP_LIBS
</pre>
<p>
You can use them like this in Makefile.am:
</p>
<pre>
AM_CPPFLAGS = $(UPNP_CPPFLAGS)
AM_LDFLAGS = $(UPNP_LDFLAGS)
program_LDADD = $(UPNP_LIBS)
</pre>
<p>
Additionally, the C preprocessor symbol HAVE_LIBUPNP will be defined with
AC_DEFINE if libupnp is available.
</p>
</div>
<h2>
Author
</h2>
<p class="indent">
Oskar Liljeblad <oskar@osk.mine.nu>
</p>
<h2>
Last Modified
</h2>
<p class="indent">
2005-04-18
</p>
<h2>
M4 Source Code
</h2>
<div class="indent">
<pre class="m4source">
AC_DEFUN([AC_LIB_UPNP], [
AH_TEMPLATE([HAVE_LIBUPNP], [Define if libupnp is available])
AC_ARG_WITH(libupnp, [ --with-libupnp=DIR prefix for upnp library files and headers], [
if test "$withval" = "no"; then
ac_upnp_path=
$2
elif test "$withval" = "yes"; then
ac_upnp_path=/usr
else
ac_upnp_path="$withval"
fi
],[ac_upnp_path=/usr])
if test "$ac_upnp_path" != ""; then
saved_CPPFLAGS="$CPPFLAGS"
CPPFLAGS="$CPPFLAGS -I$ac_upnp_path/include/upnp"
AC_CHECK_HEADER([upnp.h], [
saved_LDFLAGS="$LDFLAGS"
LDFLAGS="$LDFLAGS -L$ac_upnp_path/lib"
AC_CHECK_LIB(upnp, UpnpInit, [
AC_SUBST(UPNP_CPPFLAGS, [-I$ac_upnp_path/include/upnp])
AC_SUBST(UPNP_LDFLAGS, [-L$ac_upnp_path/lib])
AC_SUBST(UPNP_LIBS, [-lupnp])
AC_DEFINE([HAVE_LIBUPNP])
$1
], [
:
$2
])
LDFLAGS="$saved_LDFLAGS"
], [
AC_MSG_RESULT([not found])
$2
])
CPPFLAGS="$saved_CPPFLAGS"
fi
])
</pre>
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