diff options
Diffstat (limited to 'gcc/system.h')
| -rw-r--r-- | gcc/system.h | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/gcc/system.h b/gcc/system.h index 5f740e3..a241e13 100644 --- a/gcc/system.h +++ b/gcc/system.h @@ -1263,4 +1263,14 @@ void gcc_stablesort (void *, size_t, size_t, of the number. */ #define PRsa(n) "%" #n PRIu64 "%c" +/* System headers may define NULL to be an integer (e.g. 0L), which cannot be + used safely in certain contexts (e.g. as sentinels). Redefine NULL to + nullptr in order to make it safer. Note that this might confuse system + headers, however, by convention they must not be included after this point. +*/ +#ifdef __cplusplus +#undef NULL +#define NULL nullptr +#endif + #endif /* ! GCC_SYSTEM_H */ |