package/mjpg-streamer: added optional dependency to libv4l

Signed-off-by: Bernd Kuhls <bernd.kuhls@t-online.de>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>

package/mjpg-streamer/mjpg-streamer.mk

@@ -14,8 +14,13 @@ MJPG_STREAMER_LICENSE = GPLv2+
 MJPG_STREAMER_LICENSE_FILES = LICENSE
 MJPG_STREAMER_DEPENDENCIES = jpeg
 
+ifeq ($(BR2_PACKAGE_LIBV4L),y)
+MJPG_STREAMER_DEPENDENCIES += libv4l
+MJPG_STREAMER_USE_LIBV4L += USE_LIBV4L2=true
+endif
+
 define MJPG_STREAMER_BUILD_CMDS
-	$(TARGET_MAKE_ENV) $(MAKE) CC="$(TARGET_CC)" -C $(@D)
+	$(TARGET_MAKE_ENV) $(MAKE) CC="$(TARGET_CC)" -C $(@D) $(MJPG_STREAMER_USE_LIBV4L)
 endef
 
 define MJPG_STREAMER_INSTALL_TARGET_CMDS