--- Makefile	2020-12-13 19:36:43.843710000 -0500
+++ Makefile	2020-12-14 13:39:17.831125000 -0500
@@ -19,11 +19,18 @@ 
 NO_ARCH=	yes
 
 OPTIONS_DEFINE=	FULL
-OPTIONS_DEFAULT=FULL
+OPTIONS_SINGLE=		BLAS
+OPTIONS_SINGLE_BLAS=	ATLAS GOTOBLAS OPENBLAS REFERENCE
+OPTIONS_DEFAULT=	OPENBLAS FULL
 
+ATLAS_DESC=         	ATLAS blas implementation
+GOTOBLAS_DESC=		GotoBLAS blas implementation
+OPENBLAS_DESC=		OpenBLAS blas implementation
+REFERENCE_DESC=		Reference blas implementation
+
 FULL_DESC=	Add the support for math dependencies
 FULL_CMAKE_ON=	-DBLAS_DIR:PATH="${LOCALBASE}"
-FULL_USES=	blaslapack:openblas gl pkgconfig
+FULL_USES=	gl pkgconfig
 FULL_USE=	GL=gl glew glut
 FULL_LIB_DEPENDS=	libcholmod.so:math/suitesparse	\
 			libsuperlu.so:math/superlu	\
@@ -34,3 +41,16 @@ 
 			libboost_thread.so:devel/boost-libs
 
 .include <bsd.port.mk>
+
+.if ${PORT_OPTIONS:MFULL}
+ATLAS_USES=		blaslapack:atlas
+ATLAS_CMAKE_ON=		-DBLA_VENDOR:STRING="ATLAS"
+GOTOBLAS_USES=		blaslapack:gotoblas
+GOTOBLAS_CMAKE_ON=	-DBLA_VENDOR:STRING="Goto"
+OPENBLAS_USES=		blaslapack:openblas
+OPENBLAS_CMAKE_ON=	-DBLA_VENDOR:STRING="Open"
+REFERENCE_USES=		blaslapack
+REFERENCE_CMAKE_ON=	-DBLA_VENDOR:STRING="Generic"
+.endif			
+
+