| 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_ */ |
| 22 |