glue.h

微软的基于HMM的人脸识别原代码, 非常经典的说

/* glue.h -- common definitions for "glue" fucntions.
 *
 * Copyright (c) 1995 Cygnus Support
 *
 * The authors hereby grant permission to use, copy, modify, distribute,
 * and license this software and its documentation for any purpose, provided
 * that existing copyright notices are retained in all copies and that this
 * notice is included verbatim in any distributions. No written agreement,
 * license, or royalty fee is required for any of the authorized uses.
 * Modifications to this software may be copyrighted by their authors
 * and need not follow the licensing terms described here, provided that
 * the new terms are clearly indicated on the first page of each file where
 * they apply.
 */
#include <_ansi.h>

#ifndef NULL
#  define NULL 0
#endif

/*
 * support setting the errno array if it's there
 */
#ifdef errno
#  define SET_ERRNO(x)	errno = x
#else
#  define SET_ERRNO(x)
#endif

#ifdef __NO_UNDERSCORE__
#  define _end    end
#  define _exit	  exit
#endif

extern char _end[];
/* extern char _end[]; */               /* _end is set in the linker command file */
/* extern char end[]; */

/* only one prcess support, as this is OS dependant */
#define __MYPID 1