$NetBSD: patch-ab,v 1.2 2012/08/20 11:34:59 ryoon Exp $

--- src/coroutine_ucontext.c.orig	2012-07-12 08:37:05.000000000 +0000
+++ src/coroutine_ucontext.c
@@ -26,6 +26,10 @@
 #include <stdlib.h>
 #include "coroutine.h"
 
+#ifndef MAP_ANONYMOUS
+#define MAP_ANONYMOUS MAP_ANON
+#endif
+
 int coroutine_release(struct coroutine *co)
 {
     return cc_release(&co->cc);