--- Makefile	(revision 533538)
+++ Makefile	(working copy)
@@ -11,9 +11,7 @@ 
 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
@@ -24,7 +22,7 @@ 
 USE_GITHUB=	yes
 GH_ACCOUNT=	flame
 
-USES=		gmake python shebangfix
+USES=		compiler gmake python shebangfix
 USE_LDCONFIG=	yes
 SHEBANG_FILES=	build/flatten-headers.py
 
@@ -57,7 +55,15 @@ 
 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>