On Wed, 22 Aug 2007 11:03:48 -0700
Randy Dunlap <[email protected]> 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'
>
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.
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.
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