Index: head/math/blis/Makefile
===================================================================
--- head/math/blis/Makefile	(revision 533710)
+++ head/math/blis/Makefile	(revision 533711)
@@ -1,63 +1,69 @@
 # Created by: Johannes M Dieterich <jmd@FreeBSD.org>
 # $FreeBSD$
 
 PORTNAME=	blis
 PORTVERSION=	0.7.0
 CATEGORIES=	math
 
 MAINTAINER=	jmd@FreeBSD.org
 COMMENT=	Software framework for high-performance BLAS-like libraries
 
 LICENSE=	BSD3CLAUSE
 LICENSE_FILE=	${WRKSRC}/LICENSE
 
-LLVM_VER=	90
-BUILD_DEPENDS=	bash:shells/bash \
-		llvm${LLVM_VER}>=0:devel/llvm${LLVM_VER}
+BUILD_DEPENDS=	bash:shells/bash
 
 OPTIONS_DEFINE=	PARA CBLAS
 PARA_DESC=	use pthread parallelization
 CBLAS_DESC=	build the CBLAS compatibility layer
 OPTIONS_DEFAULT=	PARA CBLAS
 OPTIONS_SUB=		yes
 
 USE_GITHUB=	yes
 GH_ACCOUNT=	flame
 
-USES=		gmake python shebangfix
+USES=		compiler gmake python shebangfix
 USE_LDCONFIG=	yes
 SHEBANG_FILES=	build/flatten-headers.py
 
 HAS_CONFIGURE=	yes
 
 .include <bsd.port.options.mk>
 
 # enable BLAS and static/shared libs by default
 CONFIGURE_ARGS+=	--enable-blas \
 			--prefix=${PREFIX} \
 			--enable-shared \
 			--enable-static
 #--prefix=PREFIX
 
 .if ${PORT_OPTIONS:MPARA}
 CONFIGURE_ARGS+=	-t pthreads
 .endif
 
 .if ${PORT_OPTIONS:MCBLAS}
 CONFIGURE_ARGS+=	--enable-cblas
 .endif
 
 .if ${ARCH} == amd64
 LIBNAME=	x86_64
 CONFIGURE_ARGS+=	x86_64
 PLIST_SUB+=	ARCH="x86_64"
 .else
 LIBNAME=	generic
 CONFIGURE_ARGS+=	generic
 PLIST_SUB+=	ARCH="generic"
 .endif
 
+.include <bsd.port.pre.mk>
+
+.if ${CHOSEN_COMPILER_TYPE} == gcc
+USE_GCC=	yes
+.else
+LLVM_VER=	90
+BUILD_DEPENDS+=	llvm${LLVM_VER}>=0:devel/llvm${LLVM_VER}
 CC=	${LOCALBASE}/bin/clang${LLVM_VER}
 CXX=	${LOCALBASE}/bin/clang++${LLVM_VER}
+.endif
 
-.include <bsd.port.mk>
+.include <bsd.port.post.mk>