Index: head/math/adol-c/Makefile
===================================================================
--- head/math/adol-c/Makefile	(revision 483225)
+++ head/math/adol-c/Makefile	(revision 483226)
@@ -1,29 +1,29 @@
 # $FreeBSD$
 
 PORTNAME=	adol-c
 DISTVERSION=	2.6.3
 CATEGORIES=	math
 MASTER_SITES=	https://www.coin-or.org/download/source/${PORTNAME:tu}/
 DISTNAME=	${PORTNAME:tu}-${DISTVERSION}
 
 MAINTAINER=	yuri@FreeBSD.org
 COMMENT=	Automatic differentiation library
 
 LICENSE=	EPL
 LICENSE_FILE=	${WRKSRC}/LICENSE
 
 BUILD_DEPENDS=	bash:shells/bash
 LIB_DEPENDS=	libboost_system.so:devel/boost-libs
 
-USES=		gmake libtool tar:tgz
+USES=		compiler:c++11-lang gmake libtool tar:tgz
 GNU_CONFIGURE=	yes
 CONFIGURE_SHELL=	${LOCALBASE}/bin/bash
 USE_LDCONFIG=	yes
 
 OPTIONS_DEFINE=			SPARSE # also uses AMPI, a seemingly obscure MPI implementation
 OPTIONS_SUB=			yes
 
 SPARSE_DESC=			Build sparse drivers
 SPARSE_CONFIGURE_ENABLE=	sparse
 
 .include <bsd.port.mk>