$NetBSD: patch-ap,v 1.1.1.1 2009/06/12 09:04:57 jnemeth Exp $

--- configure.ac.orig	2008-12-15 07:48:22.000000000 -0800
+++ configure.ac
@@ -568,6 +568,9 @@ AST_C_DEFINE_CHECK([IP_MTU_DISCOVER], [I
 AC_CHECK_HEADER([libkern/OSAtomic.h],
                 [AC_DEFINE_UNQUOTED([HAVE_OSX_ATOMICS], 1, [Define to 1 if OSX atomic operations are supported.])])
 
+AC_CHECK_HEADER([sys/atomic.h],
+                [AC_DEFINE_UNQUOTED([HAVE_SYS_ATOMIC_H], 1, [Define to 1 if sys/atomic.h atomic operations are supported.])])
+
 AC_CHECK_SIZEOF(int)
 
 # do the package library checks now