$OpenBSD: patch-configure,v 1.2 2016/04/12 07:38:02 ajacoutot Exp $
--- configure.orig	Tue Feb 16 22:27:01 2016
+++ configure	Tue Apr 12 08:47:26 2016
@@ -4119,6 +4119,10 @@ fi
     powerpc-*-darwin*)
         OPENCL_LIBS=""
         ;;
+    *openbsd*)
+        ADD_RT_TRUE='#'
+        ADD_RT_FALSE=
+        ;;
     *)
         # default
          if true; then
