[PATCH] Detect i586 and i686 features at run-time

[H.J. Lu]

On Tue, Aug 18, 2015 at 10:30 AM, H.J. Lu <hjl.tools@gmail.com> wrote:
> On Tue, Aug 18, 2015 at 9:16 AM, Joseph Myers <joseph@codesourcery.com> wrote:
>> On Tue, 18 Aug 2015, H.J. Lu wrote:
>>
>>> My change is based on sysdeps/x86/bits/string.h and
>>> sysdeps/x86/bits/byteswap.h.  None of them check
>>> __i586__ nor __i686__.
>>
>> Maybe
>>
>> (a) there should be a new (installed) bits/ header for x86, say
>> bits/x86-arch.h, that defines __x86_arch to 4, 5 or 6 depending on such
>> macros, so the logic doesn't need duplicating;
>>
>
> We can add cpu-features.h to installed header to provide both
> run-time and compile-time CPU feature detection.
>

Here is a patch which does that.  OK for master?


-- 
H.J.
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