package/asterisk: add optional libical dependency

Signed-off-by: "Yann E. MORIN" <yann.morin.1998@free.fr>
Signed-off-by: Arnout Vandecappelle (Essensium/Mind) <arnout@mind.be>

package/asterisk/asterisk.mk

@@ -57,7 +57,6 @@ ASTERISK_CONF_OPTS = \
 	--without-gmime \
 	--without-h323 \
 	--without-hoard \
-	--without-ical \
 	--without-iconv \
 	--without-iksemel \
 	--without-imap \
@@ -149,6 +148,13 @@ else
 ASTERISK_CONF_OPTS += --without-bluetooth
 endif
 
+ifeq ($(BR2_PACKAGE_LIBICAL),y)
+ASTERISK_DEPENDENCIES += libical
+ASTERISK_CONF_OPTS += --with-ical
+else
+ASTERISK_CONF_OPTS += --without-ical
+endif
+
 ifeq ($(BR2_PACKAGE_NEON),y)
 ASTERISK_DEPENDENCIES += neon
 ASTERISK_CONF_OPTS += --with-neon