Index: Makefile
===================================================================
--- Makefile	(revision 486722)
+++ Makefile	(working copy)
@@ -14,9 +14,13 @@
 LIB_DEPENDS=	libjansson.so:devel/jansson \
 		libneon.so:www/neon
 
-USES=		cmake pathfix
+USES=		compiler:c11 cmake pathfix
+USE_CSTD=	c99
+USE_CXXSTD=	c++98
 USE_LDCONFIG=	yes
 
+CXXFLAGS+=	-Wno-implicit-fallthrough
+
 post-patch:
 	${REINPLACE_CMD} -e 's|/usr/local|${LOCALBASE}|g' \
 		 ${WRKSRC}/cmake/modules/*.cmake