package/asterisk: add optional libsrtp 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

@@ -90,7 +90,6 @@ ASTERISK_CONF_OPTS = \
 	--without-spandsp \
 	--without-ss7 \
 	--without-sqlite \
-	--without-srtp \
 	--without-suppserv \
 	--without-tds \
 	--without-termcap \
@@ -211,6 +210,13 @@ else
 ASTERISK_CONF_OPTS += --without-speex  --without-speexdsp
 endif
 
+ifeq ($(BR2_PACKAGE_LIBSRTP),y)
+ASTERISK_DEPENDENCIES += libsrtp
+ASTERISK_CONF_OPTS += --with-srtp
+else
+ASTERISK_CONF_OPTS += --without-srtp
+endif
+
 ifeq ($(BR2_PACKAGE_LIBVORBIS),y)
 ASTERISK_DEPENDENCIES += libvorbis
 ASTERISK_CONF_OPTS += --with-vorbis