// YANO was made this patch
// http://www.bravotouring.com/~yano/computer/linux/qmail.html#QMAILANALOG
--- error.h.orig 1998-08-31 06:39:27.000000000 +0900
+++ error.h      2005-01-04 16:01:53.716976752 +0900
@@ -1,7 +1,7 @@
 #ifndef ERROR_H
 #define ERROR_H

-extern int errno;
+#include <errno.h>

 extern int error_intr;
 extern int error_nomem;