package/libvncserver: add optional systemd dependency

Signed-off-by: Fabrice Fontaine <fontaine.fabrice@gmail.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>

package/libvncserver/libvncserver.mk

@@ -60,6 +60,13 @@ else
 LIBVNCSERVER_CONF_OPTS += -DWITH_PNG=OFF
 endif
 
+ifeq ($(BR2_PACKAGE_SYSTEMD),y)
+LIBVNCSERVER_CONF_OPTS += -DWITH_SYSTEMD=ON
+LIBVNCSERVER_DEPENDENCIES += systemd
+else
+LIBVNCSERVER_CONF_OPTS += -DWITH_SYSTEMD=OFF
+endif
+
 ifeq ($(BR2_PACKAGE_ZLIB),y)
 LIBVNCSERVER_CONF_OPTS += -DWITH_ZLIB=ON
 LIBVNCSERVER_DEPENDENCIES += zlib