On Mon, 22 Apr 2013 18:22:18 +0900 "Chanho Min" <chanho.min@xxxxxxx> wrote:
+#define HTYPE const u8*
+
+#ifdef __BIG_ENDIAN
+#define LZ4_NBCOMMONBYTES(val) (__builtin_clz(val) >> 3)
+#else
+#define LZ4_NBCOMMONBYTES(val) (__builtin_ctz(val) >> 3)
+#endif
It seems at least m68k and sparc don't have the __builtin_clz() functions:
m68k-allmodconfig (http://kisskb.ellerman.id.au/kisskb/buildresult/8572593/):
ERROR: "__clzsi2" [lib/lz4/lz4hc_compress.ko] undefined!
ERROR: "__clzsi2" [lib/lz4/lz4_compress.ko] undefined!
gcc seems to define __builtin_clz as __clzsi2 in some architecture.
But, kernel doesn't link libgcc.a.
If kernel should use gcc's built-in function without libgcc.a,
do we need to port __clzsi2 to 'arch/*/lib/*'?
This breaks alpha (gcc-4.4.4) as well. Can we please get this fixed
promptly?
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