diff -uprN cdb-0.75.old/error.h cdb-0.75/error.h
--- cdb-0.75.old/error.h	2003-09-20 21:24:31.430340296 -0700
+++ cdb-0.75/error.h	2003-09-20 21:25:32.782013424 -0700
@@ -1,7 +1,7 @@
 #ifndef ERROR_H
 #define ERROR_H
 
-extern int errno;
+#include <errno.h>
 
 extern int error_intr;
 extern int error_nomem;

.