package/bind: add libidn2 optional dependency

Signed-off-by: Fabrice Fontaine <fontaine.fabrice@gmail.com>
Signed-off-by: Arnout Vandecappelle (Essensium/Mind) <arnout@mind.be>

package/bind/bind.mk

@@ -54,6 +54,13 @@ else
 BIND_CONF_OPTS += --disable-linux-caps
 endif
 
+ifeq ($(BR2_PACKAGE_LIBIDN2),y)
+BIND_CONF_OPTS += --with-libidn2
+BIND_DEPENDENCIES += libidn2
+else
+BIND_CONF_OPTS += --without-libidn2
+endif
+
 ifeq ($(BR2_PACKAGE_LIBKRB5),y)
 BIND_CONF_OPTS += --with-gssapi=$(STAGING_DIR)/usr/bin/krb5-config
 BIND_DEPENDENCIES += libkrb5