Fwd: PATC: PR target/64409: ICE building Mesa 10.4.0 for x32 ABI

["H.J. Lu" <hjl dot tools at gmail dot com>]

Oops.  Hit the wrong button.  I will check it in.

Thanks.


---------- Forwarded message ----------
From: Uros Bizjak <ubizjak@gmail.com>
Date: Sat, Dec 27, 2014 at 7:41 AM
Subject: Re: PATC: PR target/64409: ICE building Mesa 10.4.0 for x32 ABI
To: "H.J. Lu" <hjl.tools@gmail.com>


On Sat, Dec 27, 2014 at 3:54 PM, H.J. Lu <hjl.tools@gmail.com> wrote:
> On Sat, Dec 27, 2014 at 12:44 AM, Uros Bizjak <ubizjak@gmail.com> wrote:
>> On Fri, Dec 26, 2014 at 7:38 PM, H.J. Lu <hjl.tools@gmail.com> wrote:
>>> There is no counter part of x32 in MS ABI.   Issue an error when ms_abi
>>> attribute is used with x32.  OK for trunk and branches?
>>
>> Is there a fundamental reason that x32 doesn't support ms_abi? IIRC,
>> x32 uses x86_64 ABI, so I see no reason why ms_abi should be disabled.
>>
>> I think that from the user perspective, ms_abi should "just work" on
>> x32 in the same way as on x86_64.
>
> The ms_abi attribute is used to call functions written/compiled for
> win64 from the Linux code.  You can't call functions written/compiled
> for win64, which is LLP64(LP64?), from the Linux/x32 code since pointer
> size is different. The ms_abi attribute makes no senses in x32.

The patch is OK then, but please post the explanation on the
gcc-patches@ list for archiving purposes.

Thanks,
Uros.


-- 
H.J.