Merge branch 'jk/pack-bitmap'

The pack bitmap support did not build with older versions of GCC. * jk/pack-bitmap: ewah: fix building with gcc < 3.4.0
git-mirror · Feb 18, 2015 · 2c1f554 · 2c1f554
2 parents db30b83 + bd4e882
commit 2c1f554
Showing 1 changed file with 2 additions and 1 deletion.
diff --git 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)