Index: Makefile
===================================================================
--- Makefile	(revision 482334)
+++ Makefile	(working copy)
@@ -21,7 +21,7 @@
 LDFLAGS+=	-lexecinfo
 TEST_TARGET=	check
 USE_LDCONFIG=	yes
-USES=		libtool localbase pathfix
+USES=		compiler:c++11-lang libtool localbase pathfix
 
 GH_ACCOUNT=	google
 USE_GITHUB=	yes