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Re: compiler standards (and/or min gcc version) supported with installedheaders ?
On 01/03/2013 11:59 AM, Joseph S. Myers wrote:
> On Thu, 3 Jan 2013, Carlos O'Donell wrote:
>
>>> right now, I would only mention GCC as supported compiler - and add
>>> others only if somebody steps up that is using that compiler and will
>>> take care of the support on glibc. nevertheless, I would be
>>> conservate and handle GCC extensions as extensions - something we
>>> need to test for before using it.
>>
>> Well in that case then the GLIBC_HAVE_BUILTIN_MEMSET is *assumed*
>> since we support only GCC, and versions 2.91 or newer always
>> have that builtin, so the code can be cleaned up?
>>
>> Did I understand that correctly?
>
> No. The point is that there should be feature tests before extensions are
> used in installed headers. I'd say 2.95 as minimum compiler should mean
> that pre-2.95 GCC generally gets the non-GCC code if it doesn't have the
> relevant feature (rather than having special handling to use some other
> feature it might have that can substitute for the feature in newer GCC).
The clarifies it for me thanks.
Users can continue to use pre-2.95 GCC, but will get generic code.
I like that.
Cheers,
Carlos.