diff options
Diffstat (limited to 'ewah')
| -rw-r--r-- | ewah/ewok.h | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/ewah/ewok.h b/ewah/ewok.h index f6ad190a03..13c6e20412 100644 --- a/ewah/ewok.h +++ b/ewah/ewok.h @@ -47,7 +47,8 @@ static inline uint32_t ewah_bit_popcount64(uint64_t x) return (x * 0x0101010101010101ULL) >> 56; } -#ifdef __GNUC__ +/* __builtin_ctzll was not available until 3.4.0 */ +#if defined(__GNUC__) && (__GNUC__ > 3 || (__GNUC__ == 3 && __GNUC_MINOR > 3)) #define ewah_bit_ctz64(x) __builtin_ctzll(x) #else static inline int ewah_bit_ctz64(uint64_t x) |