1/*	$NetBSD: null.h,v 1.9 2010/07/06 11:56:20 kleink Exp $	*/
 2
 3/*
 4 * Written by Klaus Klein <kleink@NetBSD.org>, December 22, 1999.
 5 * Public domain.
 6 */
 7
 8#ifndef _SYS_NULL_H_
 9#define _SYS_NULL_H_
10#ifndef	NULL
11#if !defined(__GNUG__) || __GNUG__ < 2 || (__GNUG__ == 2 && __GNUC_MINOR__ < 90)
12#if !defined(__cplusplus)
13#define	NULL	((void *)0)
14#else
15#define	NULL	0
16#endif /* !__cplusplus */
17#else
18#define	NULL	__null
19#endif
20#endif
21#endif /* _SYS_NULL_H_ */