#include <sys/types.h>
#include <string.h>
#include <stdio.h>
+#include <errno.h>
#include <a.out.h>
#include <unistd.h>
#include <ctype.h>
/********************** Variables **********************************/
/* for reporting error messages from system calls */
-extern int errno;
extern int _DYNAMIC;
extern char **environ;