On Wed, 22 Aug 2007 21:38:58 +0200 Andi Kleen wrote: > On Wed, Aug 22, 2007 at 11:32:11AM -0700, Andrew Morton wrote: > > > On Wed, 22 Aug 2007 02:06:48 -0700 Andrew Morton wrote: > > > > > > > > > > > ftp://ftp.kernel.org/pub/linux/kernel/people/akpm/patches/2.6/2.6.23-rc3/2.6.23-rc3-mm1/ > > > > > > allyesconfig on x86_64 says: > > > > > > kernel/unwind.c:1016:31: error: undefined identifier '__builtin_labs' > > > kernel/unwind.c:1232:25: error: undefined identifier '__builtin_labs' > > > > > > > Why does that compiler not know __builtin_abs?
I dunno: > gcc --version gcc (GCC) 4.1.0 (SUSE Linux) > > One wonders why x86_64-mm-unwinder.patch has an open-coded call to > > __builtin_labs(), when include/linux/kernel.h:abs() should do a fine job. > > I'll fix. > > > > > And what's this stuff, anyway? > > > > +typedef unsigned long uleb128_t; > > +typedef signed long sleb128_t; > > +#define sleb128abs __builtin_labs > > > > unsigned and signed little-endian 128-bit types? Nope, they're 32-bit or > > 64-bit. All very mysterious. > > dwarf2 uses a magic compressing encoding for numbers that uses less bytes > for small numbers and more bytes for larger numbers. These are the base > types for this. > > It's similar to fs/reiser4/dscale.h in your tree. > > -Andi --- ~Randy *** Remember to use Documentation/SubmitChecklist when testing your code *** - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
