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| author | jhb <jhb@FreeBSD.org> | 2009-05-11 17:29:11 +0000 |
|---|---|---|
| committer | jhb <jhb@FreeBSD.org> | 2009-05-11 17:29:11 +0000 |
| commit | 67e806b2d0ec50eb6b1132ee76a31b56be291167 (patch) | |
| tree | 6e2f2a178f802b9d5d456200df4e8f69cc4d449f /sys/sys/_null.h | |
| parent | 6d18ae1832ee3bb4cd45294e297777fccd4ee6ef (diff) | |
| download | FreeBSD-src-67e806b2d0ec50eb6b1132ee76a31b56be291167.zip FreeBSD-src-67e806b2d0ec50eb6b1132ee76a31b56be291167.tar.gz | |
Always use __null to define NULL for GCC 4+. Use '0' rather than
'(void *)0' for NULL for C++ compilers compiling kernel code. Together this
makes it easier to build kernel modules using C++.
Reviewed by: imp
MFC after: 3 days
Diffstat (limited to 'sys/sys/_null.h')
| -rw-r--r-- | sys/sys/_null.h | 8 |
1 files changed, 4 insertions, 4 deletions
diff --git a/sys/sys/_null.h b/sys/sys/_null.h index caae781..b53c1b2 100644 --- a/sys/sys/_null.h +++ b/sys/sys/_null.h @@ -28,18 +28,18 @@ #ifndef NULL -#if defined(_KERNEL) || !defined(__cplusplus) -#define NULL ((void *)0) -#else #if defined(__GNUG__) && defined(__GNUC__) && __GNUC__ >= 4 #define NULL __null #else +#if defined(_KERNEL) && !defined(__cplusplus) +#define NULL ((void *)0) +#else #if defined(__LP64__) #define NULL (0L) #else #define NULL 0 #endif /* __LP64__ */ +#endif /* _KERNEL && !__cplusplus */ #endif /* __GNUG__ */ -#endif /* _KERNEL || !__cplusplus */ #endif |
