Index: head/math/form/Makefile
===================================================================
--- head/math/form/Makefile	(revision 516057)
+++ head/math/form/Makefile	(revision 516058)
@@ -1,55 +1,55 @@
 # Created by: Emanuel Haupt <ehaupt@FreeBSD.org>
 # $FreeBSD$
 
 PORTNAME=	form
 PORTVERSION=	4.2.1
 DISTVERSIONPREFIX=	v
 CATEGORIES=	math
 
 MAINTAINER=	ehaupt@FreeBSD.org
 COMMENT=	Symbolic Manipulation System
 
 LICENSE=	GPLv3+
 LICENSE_FILE=	${WRKSRC}/COPYING
 
 LIB_DEPENDS=	libgmp.so:math/gmp
 
 USES=		autoreconf gmake localbase
 USE_GITHUB=	yes
 
 GNU_CONFIGURE=	yes
 
 GH_ACCOUNT=	vermaseren
 
 OPTIONS_DEFINE=	DOXYGEN OPENMPI
 OPTIONS_SUB=	yes
 
 CONFIGURE_ARGS+=	--enable-scalar \
 			--enable-largefile \
 			--with-api=posix \
 			--disable-native
 
 MPICC?=			${LOCALBASE}/mpi/openmpi/bin/mpicc
 MPICXX?=		${LOCALBASE}/mpi/openmpi/bin/mpic++
 
 DOXYGEN_BROKEN=		fails to build
 DOXYGEN_BUILD_DEPENDS=	doxygen:devel/doxygen
 
 OPENMPI_CONFIGURE_ENABLE=	parform
 
 OPENMPI_CONFIGURE_ENV+=	MPICC="${MPICC}" MPICXX="${MPICXX}"
 
 OPENMPI_LIB_DEPENDS=	libmpi.so:net/openmpi \
-			libgcc_s.so.1:lang/gcc5
+			libgcc_s.so.1:lang/gcc9
 
 post-patch:
 	@${REINPLACE_CMD} -e 's| -O3||' ${WRKSRC}/configure.ac
 
 post-build-DOXYGEN-on:
 	(cd ${WRKSRC}/doc/manual; ${MAKE_CMD} html pdf)
 
 post-install-DOXYGEN-on:
 	(cd ${WRKSRC}/doc/manual && ${COPYTREE_SHARE} html ${STAGEDIR}${DOCSDIR})
 	${INSTALL_DATA} ${WRKSRC}/doc/manual/manual.pdf ${STAGEDIR}${DOCSDIR}
 
 .include <bsd.port.mk>