$OpenBSD: patch-src_ptlib_unix_config_cxx,v 1.1.1.1 2010/03/23 21:10:17 ajacoutot Exp $
--- src/ptlib/unix/config.cxx.orig	Tue Jul  7 09:36:01 2009
+++ src/ptlib/unix/config.cxx	Tue Jul  7 09:36:20 2009
@@ -53,7 +53,7 @@
 #define environ (NULL)
 #endif
 
-#if defined(__NetBSD__)
+#if defined(__NetBSD__) || defined(__OpenBSD__)
 extern char **environ;
 #endif