package/mpd: fix zeroconf support

Add a config option to explicitly enable Avahi support in MPD.

Signed-off-by: Jörg Krause <jkrause@posteo.de>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>

package/mpd/Config.in

@@ -243,6 +243,20 @@ comment "pulseaudio support needs a toolchain w/ largefile"
 
 comment "Miscellaneous plugins"
 
+config BR2_PACKAGE_MPD_AVAHI_SUPPORT
+	bool "avahi (zeroconf) support"
+	depends on !BR2_PREFER_STATIC_LIB # avahi
+	select BR2_PACKAGE_AVAHI
+	select BR2_PACKAGE_AVAHI_DAEMON
+	select BR2_PACKAGE_AVAHI_LIBDNSSD_COMPATIBILITY
+	help
+	  Enable Avahi (zeroconf) support.
+	  Select this for multicast DNS/DNS-SD service discovery support. This allows
+	  MPD to publish service information on a local network.
+
+comment "avahi support needs a toolchain w/ dynamic library"
+	depends on BR2_PREFER_STATIC_LIB
+
 config BR2_PACKAGE_MPD_TCP
 	bool "tcp sockets"
 	default y

package/mpd/mpd.mk

@@ -13,8 +13,11 @@ MPD_LICENSE = GPLv2+
 MPD_LICENSE_FILES = COPYING
 
 # Some options need an explicit --disable or --enable
-ifeq ($(BR2_PACKAGE_AVAHI_DAEMON),y)
+
+# Zeroconf support depends on libdns_sd from avahi.
+ifeq ($(BR2_PACKAGE_MPD_AVAHI_SUPPORT),y)
 MPD_DEPENDENCIES += avahi
+MPD_CONF_OPTS += --with-zeroconf=avahi
 else
 MPD_CONF_OPTS += --with-zeroconf=no
 endif