--- Makefile.orig	2012-06-07 15:43:19.000000000 +0200
+++ Makefile	2012-06-07 15:47:07.000000000 +0200
@@ -50,6 +50,11 @@
 .include <bsd.port.pre.mk>
 
 .if ${PORT_OPTIONS:MOPENMP}
+.  if exists(/usr/bin/gcc)
+CC=gcc
+.  else
+USE_GCC?=4.6+
+.  endif
 CONFIGURE_ARGS+=	--enable-openmp
 PLIST_SUB+=	OPENMP=""
 .else