package/linknx: add optional log4cpp dependency

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

package/linknx/linknx.mk

@@ -13,7 +13,6 @@ LINKNX_INSTALL_STAGING = YES
 LINKNX_AUTORECONF = YES
 LINKNX_CONF_OPTS = \
 	--without-cppunit \
-	--without-log4cpp \
 	--without-pth-test \
 	--with-pth=$(STAGING_DIR)/usr \
 	--disable-smtp
@@ -29,6 +28,13 @@ else
 LINKNX_CONF_OPTS += --without-libcurl
 endif
 
+ifeq ($(BR2_PACKAGE_LOG4CPP),y)
+LINKNX_CONF_OPTS += --with-log4cpp
+LINKNX_DEPENDENCIES += host-pkgconf log4cpp
+else
+LINKNX_CONF_OPTS += --without-log4cpp
+endif
+
 ifeq ($(BR2_PACKAGE_LUA),y)
 LINKNX_CONF_OPTS += --with-lua
 LINKNX_DEPENDENCIES += lua