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? -- To unsubscribe from this list: send the line "unsubscribe linux-next" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
