[cfe-dev] Supporting building clang/llvm with VS2012. Why that one?

[Yaron Keren]

FWIW, I switched compiler to VC 2013 few weeks after Aaron worked around
the miscompile.

However, someone working within larger organization don't always have this
flexibility.

Yaron




2014-03-03 12:44 GMT+02:00 Chandler Carruth <chandlerc at google.com>:

>
> On Mon, Mar 3, 2014 at 2:33 AM, G M <gmisocpp at gmail.com> wrote:
>
>> Hi,
>>
>> Sorry if this is a silly question, please don't bite my head off, but:
>>
>> If I understand the situation correctly, clang/llvm aims to be buildable
>> by VS2012.
>>
>> What's the rationale for this?
>>
>> VS2012 is a pretty recent build, perhaps too recent to represent an
>> amazingly large number of users versus earlier versions of Visual Studio.
>>
>> Given that, why not aim to be compatible with VCExpress 2013 instead of
>> VS2012 and track the latest of that as soon as it's released. A new version
>> is coming soon I understand.
>>
>> I say this because it's free and both VS2012 and VCExpress can be
>> installed side by side. So why not?
>>
>
> VisualStudio 2012 has been out for well over a year, whereas 2013 has been
> out for only a few months. There was a reasonable amount of effort required
> just to get everyone migrated from 2010 to 2012, I think it would be quite
> hard to try to get everyone onto 2013. At the time I floated the suggestion
> of 2012 as the minimum version, 2013 still miscompiled LLVM pretty badly
> IIRC, but that was one of the early preview versions.
>
> However, I'm perfectly happy for the actual Windows users of LLVM and
> Clang to make this call. I personally think that given the challenges with
> the C++11 support in older versions of VisualStudio in general, it makes
> sense to be significantly more aggressive with the host toolchain version
> minimum there. But we have to listen to the users on the platform. If there
> are folks using VS2012 that would be unable to move to 2013, I think
> supporting them is likely worth the cost at least for a while.
>
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>
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