astro/openuniverse: Fix build with llvm16

- Utilize USES=localbase
- Pet portclippy

Approved by:	portmgr (blanket)
Sponsored by:	The FreeBSD Foundation

astro/openuniverse/Makefile

@@ -8,15 +8,17 @@ MAINTAINER=	ports@FreeBSD.org
 COMMENT=	OpenGL Solar System simulator for X Window System
 WWW=		http://openuniverse.sourceforge.net/
 
-USES=		gl gmake jpeg xorg
+USES=		gl gmake jpeg localbase xorg
+USE_CXXSTD=	c++14
 USE_GL=		glut
 USE_XORG=	sm ice xmu xi xext x11
+
 GNU_CONFIGURE=	yes
 
 CONFIGURE_ARGS=	--includedir="${LOCALBASE}/include" \
 		--libdir="${LOCALBASE}/lib" \
 
-CPPFLAGS+=	-I${LOCALBASE}/include/GL -I${LOCALBASE}/include
-LIBS+=		-L${LOCALBASE}/lib -lm -lcompat
+CPPFLAGS+=	-I${LOCALBASE}/include/GL
+LIBS+=		-lm -lcompat
 
 .include <bsd.port.mk>