Index: head/math/casadi/Makefile
===================================================================
--- head/math/casadi/Makefile	(revision 512369)
+++ head/math/casadi/Makefile	(revision 512370)
@@ -1,68 +1,68 @@
 # $FreeBSD$
 
 PORTNAME=	casadi
 DISTVERSION=	3.4.5-49
 DISTVERSIONSUFFIX=	-g6b0de13ac
 PORTREVISION=	1
 CATEGORIES=	math
 
 MAINTAINER=	yuri@FreeBSD.org
 COMMENT=	Symbolic framework for numeric optimization
 
 LICENSE=	GPLv3
 LICENSE_FILE=	${WRKSRC}/LICENSE.txt
 
-USES=		cmake pkgconfig
+USES=		cmake compiler:c++11-lang pkgconfig
 USE_GITHUB=	yes
 USE_LDCONFIG=	yes
 
 CFLAGS+=	-fPIC
 CXXFLAGS+=	-fPIC
 
 CMAKE_OFF=	WITH_DEEPBIND WITH_BUILD_BLASFEO
 
 OPTIONS_DEFINE=		BLASFEO BONMIN CLANG IPOPT LAPACK QPOASES
 OPTIONS_DEFAULT=	BLASFEO BONMIN IPOPT LAPACK QPOASES
 OPTIONS_SUB=		yes
 
 BLASFEO_DESC=		Build with BLASFEO
 BLASFEO_CMAKE_BOOL=	WITH_BLASFEO
 BLASFEO_BUILD_DEPENDS=	blasfeo>0:math/blasfeo
 
 BONMIN_DESC=		Build with Bonmin
 BONMIN_CMAKE_BOOL=	WITH_BONMIN
 BONMIN_USES=		blaslapack:netlib fortran
 BONMIN_LIB_DEPENDS=	libbonmin.so:math/bonmin \
 			libCbcSolver.so:math/coinmp \
 			libipopt.so:math/ipopt
 
 CLANG_DESC=		Build with clang for JIT
 CLANG_CMAKE_BOOL=	WITH_CLANG
 CLANG_BROKEN=		Fails to find clang
 
 IPOPT_DESC=		Build with IPopt
 IPOPT_CMAKE_BOOL=	WITH_IPOPT
 IPOPT_USES=		blaslapack:netlib fortran
 IPOPT_LIB_DEPENDS=	libipopt.so:math/ipopt
 
 LAPACK_DESC=		Build with LAPACK
 LAPACK_CMAKE_BOOL=	WITH_LAPACK
 LAPACK_USES=		blaslapack:openblas
 
 QPOASES_DESC=		Build with qpOASES
 QPOASES_CMAKE_BOOL=	WITH_QPOASES
 QPOASES_LIB_DEPENDS=	libopenblas.so:math/openblas
 QPOASES_IMPLIES=	LAPACK
 
 .include <bsd.port.options.mk>
 
 .if ${PORT_OPTIONS:MCLANG}
 # use clang from ports because cmake can't find base llvm for JIT
 BUILD_DEPENDS+=	clang${LLVM_DEFAULT}:devel/llvm${LLVM_DEFAULT}
 RUN_DEPENDS+=	clang${LLVM_DEFAULT}:devel/llvm${LLVM_DEFAULT}
 CPP=		clang-cpp${LLVM_DEFAULT}
 CC=		clang${LLVM_DEFAULT}
 CXX=		clang++${LLVM_DEFAULT}
 .endif
 
 .include <bsd.port.mk>
Index: head/math/ipopt/Makefile
===================================================================
--- head/math/ipopt/Makefile	(revision 512369)
+++ head/math/ipopt/Makefile	(revision 512370)
@@ -1,57 +1,58 @@
 # Created by: Pedro Giffuni
 # $FreeBSD$
 
 PORTNAME=	Ipopt
 DISTVERSION=	3.12.13
 PORTREVISION=	1
 CATEGORIES=	math
 MASTER_SITES=	https://www.coin-or.org/download/source/Ipopt/ \
 		http://glaros.dtc.umn.edu/gkhome/fetch/sw/metis/OLD/:metis \
 		http://mumps.enseeiht.fr/:mumps
 DISTFILES=	${DISTNAME}${EXTRACT_SUFX} \
 		metis-4.0.3.tar.gz:metis MUMPS_4.10.0.tar.gz:mumps
 EXTRACT_ONLY=	${DISTNAME}${EXTRACT_SUFX}
 
 MAINTAINER=	yuri@FreeBSD.org
 COMMENT=	Software package for large-scale nonlinear optimization
 
 LICENSE=	EPL
 
-USES=		blaslapack fortran libtool pathfix pkgconfig tar:tgz
+USES=		blaslapack compiler:c++11-lang fortran libtool pathfix \
+		pkgconfig tar:tgz
 GNU_CONFIGURE=	yes
 USE_LDCONFIG=	yes
 TEST_TARGET=	test
 INSTALL_TARGET=	install-strip
 
 CONFIGURE_ENV+=	PKG_CONFIG_PATH=${PREFIX}/libdata/pkgconfig \
 		CXX="${CXX} -B${LOCALBASE}/bin"
 CONFIGURE_ARGS=	--with-lapack-lib="${LAPACKLIB} -L${LOCALBASE}/lib"	\
 		--with-blas-lib="${BLASLIB} -L${LOCALBASE}/lib"
 
 CXXFLAGS+=	-ffast-math
 DEBUG_CXXFLAGS=	-fomit-frame-pointer
 
 DOCSDIR=	${PREFIX}/share/coin/doc/${PORTNAME}
 
 OPTIONS_DEFINE=		DEBUG DOCS
 
 DOCS_ALL_TARGET=	all doxydoc
 DOCS_BUILD_DEPENDS=	doxygen:devel/doxygen
 
 PORTDOCS=		*
 
 post-extract:
 	@(${ECHO} "Extracting Metis and Mumps ThirdParty libraries ..." )
 	@(cd ${WRKSRC}/ThirdParty/Metis && ${EXTRACT_CMD} ${EXTRACT_BEFORE_ARGS} ${DISTDIR}/metis-4.0.3.tar.gz ${EXTRACT_AFTER_ARGS});
 	@(${MV} ${WRKSRC}/ThirdParty/Metis/metis-4.0.? ${WRKSRC}/ThirdParty/Metis/metis-4.0);
 	@(cd ${WRKSRC}/ThirdParty/Mumps && ${EXTRACT_CMD} ${EXTRACT_BEFORE_ARGS} ${DISTDIR}/MUMPS_4.10.0.tar.gz ${EXTRACT_AFTER_ARGS});
 	@(${MV} ${WRKSRC}/ThirdParty/Mumps/MUMPS_4.10.0 ${WRKSRC}/ThirdParty/Mumps/MUMPS);
 
 pre-patch:
 	@(cd ${WRKSRC}/ThirdParty/Mumps && ${PATCH} -p0 < mumps.patch && ${PATCH} -p0 < mumps_mpi.patch )
 	@(${MV} ${WRKSRC}/ThirdParty/Mumps/MUMPS/libseq/mpi.h ${WRKSRC}/ThirdParty/Mumps/MUMPS/libseq/mumps_mpi.h);
 
 pre-build: # workaround: configure fails to find the 'rand' function, need to investigate. This patch unbreaks the build.
 	@${REINPLACE_CMD} -e 's|.*HAVE_RAND.*|#define HAVE_RAND 1|' ${WRKSRC}/Ipopt/src/Common/config.h
 
 .include <bsd.port.mk>