r187174 - Fix GNU ObjC ABI for a message returning a struct.

[John McCall]

On Jul 26, 2013, at 2:02 PM, Eli Friedman <eli.friedman at gmail.com> wrote:
> On Fri, Jul 26, 2013 at 1:58 PM, John McCall <rjmccall at apple.com> wrote:
>> On Jul 25, 2013, at 5:53 PM, Eli Friedman <eli.friedman at gmail.com> wrote:
>> 
>> Author: efriedma
>> Date: Thu Jul 25 19:53:29 2013
>> New Revision: 187174
>> 
>> URL: http://llvm.org/viewvc/llvm-project?rev=187174&view=rev
>> Log:
>> Fix GNU ObjC ABI for a message returning a struct.
>> 
>> This allows the ObjFW runtime to correctly implement message forwarding
>> for messages which return a struct.
>> 
>> Patch by Jonathan Schleifer.
>> 
>> 
>> Hey, Jonathan.
>> 
>> This isn’t really a language extension; it’s an ABI feature that fixes a
>> language
>> feature.  I don’t think it rises to the level of being worth documenting in
>> the
>> language-extensions section.
> 
> I'm the one that pushed for this: we don't want a __has_feature with
> no explanation of what it does.


That’s probably a reasonable rule, assuming we want a __has_feature here.

John.
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