Because of linking to libgraphite2, a C++11-compatible compiler is necessary.

Also, GCC needed an additional include.

While here, pet portlint.

PR:		232003
Submitted by:	Piotr Kubaj
Approved by:	portmgr (tier-2 blanket)

games/gtkradiant/Makefile

@@ -16,11 +16,13 @@ COMMENT=	Map editor for FPS games, by id Software and Loki Software
 
 LICENSE=	GPLv2
 
+BROKEN_aarch64=		Fails to link: error: ldd command returned with exit code 256
+
 LIB_DEPENDS=	libgtkglext-x11-1.0.so:x11-toolkits/gtkglext \
 		libmhash.so:security/mhash \
 		libpng.so:graphics/png
 
-USES=		pkgconfig python:2.7,build scons zip
+USES=		compiler:c++11-lang gnome pkgconfig python:2.7,build scons zip
 USE_GNOME=	gtk20 libxml2
 MAKE_ARGS=	${MAKE_ENV} BUILD=release
 SSP_UNSAFE=	yes
@@ -30,8 +32,6 @@ WRKSRC=		${WRKDIR}/GPL/GtkRadiant
 
 SUB_FILES=	${PORTNAME}
 
-BROKEN_aarch64=		Fails to link: error: ldd command returned with exit code 256
-
 post-patch:
 	@${GREP} -Rl 'defined[[:blank:]]*([[:blank:]]*__linux__[[:blank:]]*) || defined[[:blank:]]*([[:blank:]]*__APPLE__[[:blank:]]*)' ${WRKSRC} | \
 		${XARGS} ${REINPLACE_CMD} -e \

games/gtkradiant/files/patch-libs_typesystem.h

@@ -0,0 +1,10 @@
+--- libs/typesystem.h.orig	2018-10-06 15:03:20 UTC
++++ libs/typesystem.h
+@@ -24,6 +24,7 @@ Foundation, Inc., 51 Franklin St, Fifth Floor, Boston,
+ 
+ 
+ #include <list>
++#include <memory>
+ #include "generic/callback.h"
+ #include "generic/static.h"
+