Index: Makefile
===================================================================
--- Makefile	(revision 381960)
+++ Makefile	(working copy)
@@ -40,6 +40,9 @@
 OPTIONS_DEFAULT=
 OPENMP_DESC=	libraw uses OpenMP (implies GCC 4.6+)
 
+OPENMP_USES=		compiler:gcc-c++11-lib
+OPENMP_USES_OFF=	compiler:c++11-lib
+
 .include <bsd.port.options.mk>
 
 .if ${PORT_OPTIONS:MOPENMP}