diff options
Diffstat (limited to 'src/conf_post.h')
| -rw-r--r-- | src/conf_post.h | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/src/conf_post.h b/src/conf_post.h index 14af38ce70b..7d4e1f43ed7 100644 --- a/src/conf_post.h +++ b/src/conf_post.h @@ -248,12 +248,20 @@ extern void _DebPrint (const char *fmt, ...); # define FLEXIBLE_ARRAY_MEMBER 1 #endif +#ifdef __clang__ +# ifndef __has_builtin +# define __has_builtin(x) 0 +# endif +#endif + /* assume(cond) tells the compiler (and lint) that a certain condition * will always hold, and that it should optimize (or check) accordingly. */ #if defined lint # define assume(cond) ((cond) ? (void) 0 : abort ()) #elif (__GNUC__ == 4 && __GNUC_MINOR__ >= 5) || __GNUC__ > 4 # define assume(cond) ((cond) || (__builtin_unreachable(), 0)) +#elif defined (__clang__) && __has_builtin (__builtin_unreachable) +# define assume(cond) ((cond) || (__builtin_unreachable(), 0)) #elif defined __MSC_VER # define assume(cond) __assume ((cond)) #else |