math/yacas: Improve port

* Switch PORTVERSION to DISTVERSION
* Convert to USES= cmake:testing
* Convert to use CMAKE framework helpers
* Fix typo in comment

math/yacas/Makefile

@@ -1,6 +1,6 @@
 PORTNAME=	yacas
-PORTVERSION=	1.9.1
 DISTVERSIONPREFIX=	v
+DISTVERSION=	1.9.1
 PORTREVISION=	1
 CATEGORIES=	math
 
@@ -12,28 +12,27 @@ LICENSE=	LGPL21
 LICENSE_FILE=	${WRKSRC}/COPYING
 
 TEST_DEPENDS=	bash:shells/bash \
+		googletest>0:devel/googletest
 
-BUILD_DEPENDS=	googletest>0:devel/googletest
-
-USES=		cmake compiler:c++17-lang
-
-CMAKE_ARGS=	-DENABLE_DOCS:BOOL=OFF \
-		-DENABLE_CYACAS_CONSOLE:BOOL=ON \
-		-DENABLE_CYACAS_KERNEL:BOOL=OFF \
-		-DENABLE_CYACAS_GUI:BOOL=OFF \
-		-DENABLE_JYACAS:BOOL=OFF \
-		-DENABLE_CYACAS_UNIT_TESTS:BOOL=ON \
-		-DENABLE_CYACAS_BENCHMARKS:BOOL=OFF
-
-TEST_TARGET=	test
+USES=		cmake:testing compiler:c++17-lang
 
 USE_GITHUB=	yes
 GH_ACCOUNT=	grzegorzmazur
 
 PLIST_SUB=	SHLIB_VERSION=${PORTVERSION:S/.//}.0
 
+CMAKE_TESTING_ON=	ENABLE_CYACAS_UNIT_TESTS
+
+CMAKE_OFF=	ENABLE_DOCS \
+		ENABLE_CYACAS_BENCHMARKS \
+		ENABLE_CYACAS_KERNEL \
+		ENABLE_CYACAS_GUI \
+		ENABLE_JYACAS \
+
+CMAKE_ON=	ENABLE_CYACAS_CONSOLE
+
 post-patch:
-#	Can't use USES=shebangfix here, cause the path appears several
+#	Can't use USES=shebangfix here, because the path appears several
 #	times in the file.
 	@${REINPLACE_CMD} -e 's| /bin/bash| ${LOCALBASE}/bin/bash|g' \
 		${WRKSRC}/tests/test-yacas