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# ===========================================================================
# https://www.gnu.org/software/autoconf-archive/ax_lib_upnp.html
# ===========================================================================
#
# SYNOPSIS
#
# AX_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 = $(UPNP_LIBS)
#
# Additionally, the C preprocessor symbol HAVE_LIBUPNP will be defined
# with AC_DEFINE if libupnp is available.
#
# LICENSE
#
# Copyright (c) 2009 Oskar Liljeblad <oskar@osk.mine.nu>
#
# Copying and distribution of this file, with or without modification, are
# permitted in any medium without royalty provided the copyright notice
# and this notice are preserved. This file is offered as-is, without any
# warranty.
#serial 6
AU_ALIAS([AC_LIB_UPNP], [AX_LIB_UPNP])
AC_DEFUN([AX_LIB_UPNP], [
AH_TEMPLATE([HAVE_LIBUPNP], [Define if libupnp is available])
AC_ARG_WITH(libupnp, [ --with-libupnp=DIR prefix for upnp library files and headers], [
if test "$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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