Index: head/science/elmerfem/Makefile
===================================================================
--- head/science/elmerfem/Makefile	(revision 529123)
+++ head/science/elmerfem/Makefile	(revision 529124)
@@ -1,84 +1,84 @@
 # Created by: Pedro Giffuni
 # $FreeBSD$
 
 PORTNAME=	elmerfem
 PORTVERSION=	8.4.20200309
 DISTVERSIONPREFIX=	release-
 CATEGORIES=	science
 
 MAINTAINER=	henrik@gulbra.net
 COMMENT=	Multiphysical simulation software
 
 LICENSE=	GPLv2
 
 LIB_DEPENDS=	libmetis.so:math/metis \
 		libmpich.so:net/mpich \
 		libopenblas.so:math/openblas \
 		libparpack.so:math/arpack-ng
 
-USES=		cmake fortran tcl
+USES=		cmake compiler:c++11-lang fortran tcl
 USE_GITHUB=	yes
 GH_ACCOUNT=	ElmerCSC
 GH_TAGNAME=	39f692c
 USE_LDCONFIG=	${PREFIX}/lib/elmersolver
 
 ALL_TARGET=	# empty
 
 CMAKE_ARGS=	-DELMER_FEM_REVISION:STRING=${GH_TAGNAME}
 
 LDFLAGS+=	-L${LOCALBASE}/lib
 FCPPFLAGS+=	-ansi
 
 CMAKE_ARGS+=	-DHAVE_INTTYPES_H=ON
 .if !defined(MAINTAINER_MODE)
 CMAKE_ARGS+=	-Wno-dev
 .endif
 
 OPTIONS_DEFINE=		GUI
 OPTIONS_DEFAULT=	GUI
 OPTIONS_SUB=		yes
 
 GUI_LIB_DEPENDS=	libexpat.so:textproc/expat2 \
 			libfreetype.so:print/freetype2 \
 			libpng16.so:graphics/png \
 			libpython2.7.so:lang/python27 \
 			libqwt6.so:x11-toolkits/qwt6 \
 			libtiff.so:graphics/tiff \
 			libvtksys-6.2.so:math/vtk6
 GUI_USES=		gl jpeg qt:5 xorg
 GUI_USE=		gl=gl,glu xorg=ice,sm,x11,xext,xt \
 			qt=buildtools_build,concurrent,core,declarative,gui,location,network,opengl,printsupport,qmake_build,script,sensors,sql,svg,webchannel,webkit,widgets,xml
 
 GUI_CMAKE_BOOL=	WITH_ELMERGUI WITH_PARAVIEW WITH_QT5 QT_FOUND # WITH_OCC requires the QVTKWidget.h that is only provided by the math/vtk6 with QT5=yes
 GUI_CMAKE_ON=	-DQWT_LIBRARY=${QT_LIBDIR}/libqwt6.so \
 		-DQWT_INCLUDE_DIR=${QT_INCDIR}/qwt6 \
 		-DDESIRED_QT_VERSION=5
 
 .include <bsd.port.pre.mk>
 
 .if ${ARCH} == "amd64"
 CFLAGS_${ARCH}=	-fPIC
 CXXFLAGS_${ARCH}= -fPIC
 FCFLAGS+=	-fPIC
 FFLAGS+=	-fPIC
 .endif
 
 post-patch:
 	@${RM} -r ${WRKSRC}/elmergrid/src/metis-5.1.0
 	@${REINPLACE_CMD} -e 's,"metis.*/metis\.h",<metis.h>,' \
 		${WRKSRC}/elmergrid/src/femelmer.c
 
 post-patch-GUI-on:
 	#@${REINPLACE_CMD} -e "s|\$${VERSION}|`${PKG_QUERY} '%v' opencascade`|" \
 	#	"${WRKSRC}/cmake/Modules/FindOCE.cmake"
 	#@${REINPLACE_CMD} -e 's|$${INCLUDE}|${LOCALBASE}/include/OpenCASCADE|' \
 	#	"${WRKSRC}/cmake/Modules/FindOCE.cmake"
 
 post-install:
 	${LN} -sf ElmerSolver_mpi ${STAGEDIR}${PREFIX}/bin/ElmerSolver
 	@${STRIP_CMD} ${STAGEDIR}/${PREFIX}/bin/ElmerGrid
 
 do-test:
 	@cd ${TEST_WRKSRC} && ctest -C ${CMAKE_BUILD_TYPE} ${_MAKE_JOBS}
 
 .include <bsd.port.post.mk>