Index: head/games/cave9/Makefile
===================================================================
--- head/games/cave9/Makefile	(revision 555435)
+++ head/games/cave9/Makefile	(revision 555436)
@@ -1,54 +1,54 @@
 # Created by: Dmitry Marakasov <amdmi3@FreeBSD.org>
 # $FreeBSD$
 
 PORTNAME=	cave9
 PORTVERSION=	0.4.1.git20150408
 PORTREVISION=	1
 CATEGORIES=	games
 
 MAINTAINER=	amdmi3@FreeBSD.org
 COMMENT=	Gravity cave-exploration game
 
 LICENSE=	GPLv3+ CC-BY-SA-3.0 CC-BY-2.5
 LICENSE_COMB=	multi
 LICENSE_FILE=	${WRKSRC}/data/README.txt # CC licenses
 LICENSE_FILE_GPLv3+ =	${WRKSRC}/COPYING.txt
 
 USE_GITHUB=	yes
 GH_ACCOUNT=	bart9h
 GH_TAGNAME=	e6896eb
 
-USES=		gl gmake sdl
+USES=		compiler:c++11-lang gl gmake sdl
 USE_SDL=	sdl ttf image
 USE_GL=		gl glu
 
 BUILD_WRKSRC=	${WRKSRC}/src
 
 MAKEFILE=	GNUmakefile
 CFLAGS+=	-DDATADIR=\\\"${DATADIR}\\\"
 
 PLIST_FILES=	bin/${PORTNAME}
 PORTDOCS=	*
 PORTDATA=	*
 
 DESKTOP_ENTRIES="${PORTNAME}" \
 		"" \
 		"${DATADIR}/icon.png" \
 		"${PORTNAME}" \
 		"Game;ArcadeGame;" \
 		""
 
 OPTIONS_DEFINE=	DOCS
 
 do-install:
 	${INSTALL_PROGRAM} ${WRKSRC}/cave9 ${STAGEDIR}${PREFIX}/bin/
 	@${MKDIR} ${STAGEDIR}${DATADIR}
 .for d in wav png ttf jpg
 	${INSTALL_DATA} ${WRKSRC}/data/*.$d ${STAGEDIR}${DATADIR}/
 .endfor
 
 do-install-DOCS-on:
 	@${MKDIR} ${STAGEDIR}${DOCSDIR}
 	${INSTALL_DATA} ${WRKSRC}/AUTHORS.txt ${WRKSRC}/README.txt ${STAGEDIR}${DOCSDIR}/
 
 .include <bsd.port.mk>
Index: head/games/cave9/files/patch-src_GNUmakefile
===================================================================
--- head/games/cave9/files/patch-src_GNUmakefile	(revision 555435)
+++ head/games/cave9/files/patch-src_GNUmakefile	(revision 555436)
@@ -1,30 +1,30 @@
 --- src/GNUmakefile.orig	2015-04-07 14:37:56 UTC
 +++ src/GNUmakefile
 @@ -2,8 +2,8 @@
  
  TARGET = ../cave9
  
 -CFLAGS += -std=c99 -Wall -Werror -ggdb `sdl-config --cflags`
 -LDFLAGS += -lSDL_ttf -lSDL_image `sdl-config --libs` -L/usr/X11/lib -lGL -lGLU -lm
-+CFLAGS += -std=c99 -Wall -Werror -isystem ${LOCALBASE}/include `sdl-config --cflags`
++CFLAGS += -std=c99 -Wall -isystem ${LOCALBASE}/include `sdl-config --cflags`
 +LDFLAGS += -lSDL_ttf -lSDL_image -L${LOCALBASE}/lib `sdl-config --libs` -lGL -lGLU -lm
  
  ifdef GLOBAL_SCORE
  CFLAGS += -DGLOBAL_SCORE
 @@ -11,7 +11,6 @@ LDFLAGS += -lSDL_net
  endif
  
  # necessary when some SDL libs are on /usr/local, and others on /usr
 -CFLAGS += -I/usr/local/include/SDL -I/usr/include/SDL
  
  
  #{{{1  build rules
 @@ -29,6 +28,8 @@ SRCS = \
  
  OBJS = $(subst .c,.o,$(SRCS))
  
 +all: $(TARGET)
 +
  $(TARGET): $(OBJS)
  	$(CC) $^ $(LDFLAGS) -o $@