Index: head/science/sparta/Makefile
===================================================================
--- head/science/sparta/Makefile	(revision 499895)
+++ head/science/sparta/Makefile	(revision 499896)
@@ -1,48 +1,48 @@
 # $FreeBSD$
 
 PORTNAME=	sparta
 PORTVERSION=	${GH_TAGNAME:C/([0-9]{1,2})([A-Z][a-z][a-z])([0-9]{4})/\3.\2.\1/S/Jan/01/S/Feb/02/S/Mar/03/S/Apr/04/S/May/05/S/Jun/06/S/Jul/07/S/Aug/08/S/Sep/09/S/Oct/10/S/Nov/11/S/Dec/12/}
 CATEGORIES=	science
 PKGNAMESUFFIX=	-dsmc # Direct Simulation Monte Carlo
 
 MAINTAINER=	yuri@FreeBSD.org
 COMMENT=	Gas simulator: SPARTA DSMC software package
 
 LICENSE=	GPLv2
 LICENSE_FILE=	${WRKSRC}/../LICENSE
 
 BUILD_DEPENDS=	bash:shells/bash
 
-USES=		gmake localbase
+USES=		compiler:c++11-lang gmake localbase
 USE_GITHUB=	yes
 GH_TAGNAME=	16Apr2019
 
 CXXFLAGS+=	-DSPARTA_UNORDERED_MAP
 
 WRKSRC_SUBDIR=	src
 MAKE_ARGS=	CC=${CXX} CCFLAGS="${CXXFLAGS}" LINK=${CXX} LINKFLAGS="${LDFLAGS}" mode=exe
 
 OPTIONS_SINGLE=			PARALLEL
 OPTIONS_SINGLE_PARALLEL=	SERIAL MPI
 OPTIONS_DEFAULT=		MPI
 PARALLEL_DESC=			Parallelization
 
 SERIAL_DESC=			Serial: no parallelization
 SERIAL_ALL_TARGET=		serial
 SERIAL_PLIST_FILES=		bin/spa_serial
 
 MPI_ALL_TARGET=			mpi
 MPI_PLIST_FILES=		bin/spa_mpi
 MPI_CXXFLAGS=			-I${LOCALBASE}/mpi/openmpi/include
-MPI_LDFLAGS=			${LOCALBASE}/mpi/openmpi/lib/libmpi.so -Wl,-rpath=${LOCALBASE}/mpi/openmpi/lib
+MPI_LDFLAGS=			${LOCALBASE}/mpi/openmpi/lib/libmpi.so ${LOCALBASE}/mpi/openmpi/lib/libmpi_cxx.so -Wl,-rpath=${LOCALBASE}/mpi/openmpi/lib
 MPI_LIB_DEPENDS=		libmpi.so:net/openmpi
 
 PORTSCOUT=	ignore # due to a special version tagging scheme that this project uses portscout fails to find new versions, watching their release page instead
 
 post-patch:
 	@${REINPLACE_CMD} 's|SHELL = /bin/bash|SHELL = ${LOCALBASE}/bin/bash|' ${WRKSRC}/Makefile
 
 do-install:
 	${INSTALL_PROGRAM} ${WRKSRC}/spa_* ${STAGEDIR}${PREFIX}/bin/
 
 .include <bsd.port.mk>