Index: head/science/chemtool/Makefile
===================================================================
--- head/science/chemtool/Makefile	(revision 482590)
+++ head/science/chemtool/Makefile	(revision 482591)
@@ -1,38 +1,38 @@
 # Created by: Ying-Chieh Liao <ijliao@FreeBSD.org>
 # $FreeBSD$
 
 PORTNAME=	chemtool
 DISTVERSION=	1.6.14
 CATEGORIES=	science
 MASTER_SITES=	http://ruby.chemie.uni-freiburg.de/~martin/chemtool/
 
 MAINTAINER=	yuri@FreeBSD.org
 COMMENT=	Draw organic molecules easily and store them
 
 LICENSE=	GPLv2
 LICENSE_FILE=	${WRKSRC}/COPYING
 
 LIB_DEPENDS=	libEMF.so:graphics/libemf \
 		libfontconfig.so:x11-fonts/fontconfig \
 		libfreetype.so:print/freetype2
 RUN_DEPENDS=	transfig:print/transfig
 
-USES=		gmake pkgconfig
+USES=		compiler:c++11-lang gmake gnome pkgconfig
 GNU_CONFIGURE=	yes
 CONFIGURE_ARGS=	--enable-emf=yes --with-localedir=${PREFIX}
 USE_GNOME=	cairo gdkpixbuf2 gtk20
 USE_XORG=	x11
 
 OPTIONS_DEFINE=	NLS EXAMPLES
 OPTIONS_SUB=	yes
 
 NLS_USES=	gettext
 NLS_CONFIGURE_ENABLE=	nls
 
 PORTEXAMPLES=	*
 
 do-install-EXAMPLES-on:
 	cd ${WRKSRC}/examples && ${FIND} . | \
 		${CPIO} -pdm -L -R ${SHAREOWN}:${SHAREGRP} ${STAGEDIR}${EXAMPLESDIR}
 
 .include <bsd.port.mk>