--- b/games/openclonk/Makefile	
+++ b/games/openclonk/Makefile	
@@ -21,7 +21,7 @@ LIB_DEPENDS=	libboost_thread.so:${PORTSDIR}/devel/boost-libs \
 		libpng.so:${PORTSDIR}/graphics/png \
 		libvorbis.so:${PORTSDIR}/audio/libvorbis
 
-USES=		cmake iconv pkgconfig tar:bzip2
+USES=		cmake compiler:c++11-lib iconv pkgconfig tar:bzip2
 USE_GL=		glew
 USE_GNOME=	gtk20
 USE_SDL=	sdl mixer
--- /dev/null	
+++ b/games/openclonk/files/patch-src_platform_StdSync.h	
@@ -0,0 +1,12 @@ 
+--- src/platform/StdSync.h.orig	2014-10-05 13:22:07 UTC
++++ src/platform/StdSync.h
+@@ -135,7 +135,8 @@ public:
+ 		{
+ 			// Use pthread_cond_wait or pthread_cond_timedwait depending on wait length. Check return value.
+ 			// Note this will temporarily unlock the mutex, so no deadlock should occur.
+-			timespec ts = { iMillis / 1000, (iMillis % 1000) * 1000000 };
++			timespec ts = { static_cast<time_t>(iMillis / 1000),
++				static_cast<long>((iMillis % 1000) * 1000000) };
+ 			if (0 != (iMillis != INFINITE ? pthread_cond_timedwait(&cond, &mutex, &ts) : pthread_cond_wait(&cond, &mutex)))
+ 			{
+ 				pthread_mutex_unlock(&mutex);