--- popen.c.orig	Fri Jan  3 16:15:15 2003
+++ popen.c	Sat May  3 14:05:13 2003
@@ -55,7 +55,8 @@
 #include "un-namespace.h"
 #include "libc_private.h"
 
-extern char **environ;
+#include <crt_externs.h>
+#define environ (*_NSGetEnviron())
 
 static struct pid {
 	struct pid *next;