mpd: add and enable libao support.

srcpkgs/mpd/template

@@ -1,13 +1,14 @@
 # Template file for 'mpd'
 pkgname=mpd
 version=0.19.9
-revision=1
+revision=2
 build_style=gnu-configure
 configure_args="--enable-opus --enable-mikmod --enable-neighbor-plugins
  --enable-soundcloud --enable-pipe-output --disable-twolame-encoder
  --disable-sidplay --enable-bzip2 --enable-zzip $(vopt_enable jack)
  $(vopt_enable lame lame-encoder) $(vopt_enable mpcdec mpc)
- $(vopt_enable pulseaudio pulse) $(vopt_enable wavpack)"
+ $(vopt_enable pulseaudio pulse) $(vopt_enable wavpack)
+ $(vopt_enable libao)"
 hostmakedepends="pkg-config"
 makedepends="
  ffmpeg-devel>=2.1 libmodplug-devel libmad-devel libcurl-devel faad2-devel
@@ -17,7 +18,7 @@ makedepends="
  libcdio-paranoia-devel zziplib-devel libmpdclient-devel opus-devel samba-devel libnfs-devel
  libupnp-devel $(vopt_if jack jack-devel) $(vopt_if lame lame-devel)
  $(vopt_if mpcdec libmpcdec-devel) $(vopt_if pulseaudio pulseaudio-devel)
- $(vopt_if wavpack wavpack-devel)"
+ $(vopt_if wavpack wavpack-devel) $(vopt_if libao libao-devel)"
 conf_files="/etc/mpd.conf"
 system_accounts="mpd"
 mpd_homedir="/var/lib/mpd"
@@ -30,8 +31,8 @@ distfiles="http://www.musicpd.org/download/mpd/${version%.*}/mpd-${version}.tar.
 checksum=47851423053cd38cfad65be5985b41b7cd5bdbe8d0d13378e11748a28b19f26f
 
 # Package build options
-build_options="jack lame mpcdec pulseaudio systemd wavpack"
-build_options_default="pulseaudio"
+build_options="jack lame mpcdec pulseaudio libao systemd wavpack"
+build_options_default="pulseaudio libao"
 
 if [ "$build_option_systemd" ]; then
 	configure_args+=" --enable-systemd-daemon --with-systemdsystemunitdir=/usr/lib/systemd/system"