games/lincity-ng: Fix build with llvm16

- Pet portclippy

Sponsored by:	The FreeBSD Foundation

games/lincity-ng/Makefile

@@ -8,21 +8,23 @@ MAINTAINER=	ports@FreeBSD.org
 COMMENT=	Improved rich city simulation game for X
 WWW=		http://lincity-ng.berlios.de
 
-BUILD_DEPENDS=	jam:devel/jam
-LIB_DEPENDS=	libphysfs.so:devel/physfs
-
 LICENSE=	GPLv2+
 LICENSE_FILE=	${WRKSRC}/COPYING
 
+BUILD_DEPENDS=	jam:devel/jam
+LIB_DEPENDS=	libphysfs.so:devel/physfs
+
 USES=		gl gnome localbase:ldflags pkgconfig sdl tar:bzip2 xorg
-USE_SDL=	sdl mixer image ttf gfx
+USE_CXXSTD=	c++14
 USE_GL=		gl
-USE_XORG=	x11
 USE_GNOME=	libxml2
+USE_SDL=	sdl mixer image ttf gfx
+USE_XORG=	x11
 
 GNU_CONFIGURE=	yes
 CONFIGURE_ARGS=	--with-libphysfs=${LOCALBASE} \
 		--x-libraries=${LOCALBASE}/lib --x-includes=${LOCALBASE}/include
+
 LDFLAGS+=	-lpthread
 
 PLIST_FILES=	bin/lincity-ng \