$NetBSD: patch-ak,v 1.1 2009/03/18 11:57:16 jmcneill Exp $

--- src/ptlib/unix/config.cxx.orig	2009-03-17 23:43:30.000000000 -0400
+++ src/ptlib/unix/config.cxx
@@ -53,6 +53,10 @@
 #define environ (NULL)
 #endif
 
+#if defined(__NetBSD__)
+extern char **environ;
+#endif
+
 //
 //  a single key/value pair
 //
