diff -urN /usr/ports/devel/boehm-gc.old/Makefile /usr/ports/devel/boehm-gc/Makefile
--- /usr/ports/devel/boehm-gc.old/Makefile	2014-12-18 13:15:34.000000000 +0100
+++ /usr/ports/devel/boehm-gc/Makefile	2015-05-09 02:18:58.000000000 +0200
@@ -22,7 +22,9 @@
 BUILD_DEPENDS=	${LOCALBASE}/lib/libatomic_ops.a:${PORTSDIR}/devel/libatomic_ops
 
 GNU_CONFIGURE=	yes
-USES=		libtool pathfix pkgconfig
+USES=		cpe libtool pathfix pkgconfig
+CPE_VENDOR=	boehm-demers-weiser
+CPE_PRODUCT=	garbage_collector
 USE_LDCONFIG=	yes
 INSTALL_TARGET=	install-strip
 CONFIGURE_ARGS=	--enable-cplusplus --disable-static