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# ===========================================================================
# http://autoconf-archive.cryp.to/ac_lib_upnp.html
# ===========================================================================
#
# SYNOPSIS
#
# AC_LIB_UPNP([ACTION-IF-TRUE], [ACTION-IF-FALSE])
#
# DESCRIPTION
#
# 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:
#
# UPNP_CPPFLAGS
# UPNP_LDFLAGS
# UPNP_LIBS
#
# You can use them like this in Makefile.am:
#
# AM_CPPFLAGS = $(UPNP_CPPFLAGS)
# AM_LDFLAGS = $(UPNP_LDFLAGS)
# program_LDADD = $(UPNP_LIBS)
#
# Additionally, the C preprocessor symbol HAVE_LIBUPNP will be defined
# with AC_DEFINE if libupnp is available.
#
# LICENSE
#
# Copyright (c) 2008 Oskar Liljeblad <oskar@osk.mine.nu>
#
# This program is free software: you can redistribute it and/or modify it
# under the terms of the GNU General Public License as published by the
# Free Software Foundation, either version 3 of the License, or (at your
# option) any later version.
#
# This program is distributed in the hope that it will be useful, but
# WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General
# Public License for more details.
#
# You should have received a copy of the GNU General Public License along
# with this program. If not, see <http://www.gnu.org/licenses/>.
AC_DEFUN([AC_LIB_UPNP], [
AH_TEMPLATE([HAVE_LIBUPNP], [Define if libupnp is available])
AC_ARG_WITH(libupnp, [ --with-libupnp=DIR prefix for upnp library files and headers], [
if test "$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
])
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