diff options
Diffstat (limited to 'include/features.h')
| -rw-r--r-- | include/features.h | 14 |
1 files changed, 14 insertions, 0 deletions
diff --git a/include/features.h b/include/features.h index 880cd36ef..54330dae9 100644 --- a/include/features.h +++ b/include/features.h @@ -26,6 +26,20 @@ #define __attribute(foo) /* Ignore */ #endif +/* Convenience macro to test the version of gcc. + * Use it like this: + * #if __GNUC_PREREQ (2,8) + * ... code requiring gcc 2.8 or later ... + * #endif + * Note - they won't work for gcc1, since the _MINOR macros + * were not defined then. */ +#if defined __GNUC__ && defined __GNUC_MINOR__ +#define __GNUC_PREREQ(maj, min) \ + ((__GNUC__ << 16) + __GNUC_MINOR__ >= ((maj) << 16) + (min)) +#else +#define __GNUC_PREREQ(maj,min) 0 +#endif + /* __restrict is known in EGCS 1.2 and above. */ #if !defined __GNUC__ || __GNUC__ < 2 || (__GNUC__ == 2 && __GNUC_MINOR__ < 92) # define __restrict /* Ignore */ |