diff options
| author | Marc Espie <espie@cvs.openbsd.org> | 1999-06-11 22:47:49 +0000 |
|---|---|---|
| committer | Marc Espie <espie@cvs.openbsd.org> | 1999-06-11 22:47:49 +0000 |
| commit | 25018aae1e7a8c2288f61c32416e8d3c083a479f (patch) | |
| tree | 1c6ccf39bfe7ab1508da3896c13a7920df0f267b /include/unistd.h | |
| parent | 5d30b9dd685cc89d485c7ec3f358e239e00bfe45 (diff) | |
Define NULL to be __null for C++: better quality of implementation.
__null is a magic constant of integral type that converts to a null pointer
as should be, but warns for ambiguity when used to resolved an overload
between an integral type and a pointer type.
Diffstat (limited to 'include/unistd.h')
| -rw-r--r-- | include/unistd.h | 6 |
1 files changed, 5 insertions, 1 deletions
diff --git a/include/unistd.h b/include/unistd.h index 0d2b3044638..449295d9b09 100644 --- a/include/unistd.h +++ b/include/unistd.h @@ -1,4 +1,4 @@ -/* $OpenBSD: unistd.h,v 1.25 1999/05/22 23:49:48 weingart Exp $ */ +/* $OpenBSD: unistd.h,v 1.26 1999/06/11 22:47:47 espie Exp $ */ /* $NetBSD: unistd.h,v 1.26.4.1 1996/05/28 02:31:51 mrg Exp $ */ /*- @@ -48,8 +48,12 @@ #define STDERR_FILENO 2 /* standard error file descriptor */ #ifndef NULL +#ifdef __GNUG__ +#define NULL __null +#else #define NULL 0 /* null pointer constant */ #endif +#endif __BEGIN_DECLS __dead void _exit __P((int)) __attribute__((noreturn)); |