Index: head/math/clrng/Makefile
===================================================================
--- head/math/clrng/Makefile	(revision 425695)
+++ head/math/clrng/Makefile	(revision 425696)
@@ -1,35 +1,38 @@
 # Created by: Johannes Dieterich <dieterich@ogolem.org>
 # $FreeBSD$
 
 PORTNAME=	clrng
-DISTVERSION=	1.0.0-beta
 DISTVERSIONPREFIX=	v
+DISTVERSION=	1.0.0-beta
 CATEGORIES=	math
 
 MAINTAINER=	dieterich@ogolem.org
 COMMENT=	Library for uniform random number generation in OpenCL
 
 LICENSE=	BSD2CLAUSE
 LICENSE_FILE=	${WRKSRC}/LICENSE
 
 BUILD_DEPENDS=	opencl>=0:devel/opencl
 LIB_DEPENDS=	libOpenCL.so:devel/ocl-icd
 RUN_DEPENDS=	opencl>=0:devel/opencl
 
 BROKEN_FreeBSD_9=	clRNG is only supported on FreeBSD 10.1 and newer
+
+ONLY_FOR_ARCHS=		amd64 i386 powerpc powerpc64
+ONLY_FOR_ARCHS_REASON=	this code has only been tested on x86 and powerpc platforms
 
 USE_GITHUB=	yes
 GH_ACCOUNT=	clMathLibraries
 GH_PROJECT=	clRNG
 
 USE_LDCONFIG=	yes
 USES=		cmake
 
 CMAKE_ARGS+=	-DBUILD_CLIENT=OFF \
 		-DBUILD_TEST=OFF \
 		-DSUFFIX_LIB="" \
 		-DSUFFIX_BIN=""
 
 CMAKE_SOURCE_PATH=	${WRKSRC}/src
 
 .include <bsd.port.mk>