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Subject: Re: [boost] [clang] How to use CLang for Windows?
From: Edward Diener (eldiener_at_[hidden])
Date: 2013-09-29 22:46:46


On 9/29/2013 10:15 PM, Chandler Carruth wrote:
> On Sun, Sep 29, 2013 at 7:36 PM, Edward Diener <eldiener_at_[hidden]>wrote:
>
>> The fix that I had made to Boost PP config.h, which I was asked to remove
>> by Beman Dawes, explicitly detects that when _MSC_VER is defined and
>> __clang__ is defined Boost PP should not treat the compiler as VC++. In the
>> Boost PP config.h file prior to my fix if _MSC_VER is defined then the
>> compiler is treated as VC++.
>>
>> There are other cases in the Boost header files that assume that when
>> _MSC_VER is defined the compiler is VC++ ( see my thread "Boost and clang
>> under Windows" ) without checking if it could be another compiler emulating
>> VC++. I had proposed in the aforementioned thread that I was willing to
>> work on changing such code in other Boost libraries so that it did the
>> correct thing when both _MSC_VER and __clang__ were defined, but the
>> reaction of not only Mr. Dawes and others was that I should not do that so
>> I desisted.
>>
>
> Our hope is that generally speaking, you shouldn't need to special case
> Clang -- it should be compatible. When it isn't compatible, ideally we'd
> like to fix the bugs so that it is compatible.
>
> There may be a few cases where the code that Boost is using for VC++ is
> working around (and in the process relying on) really excessive quirks or
> bugs, and there it may be more pragmatic to just switch to more
> standards-based code path by checking for Clang explicitly. In other cases,
> VC++ may not have access to features that it makes sense to enable by
> detecting Clang.
>
> If there are questions about a specific case, feel free to reach out to the
> Clang developers with either a bug report or email, and they can likely
> help.

There is a clang user mailing list but the clang developers never seem
to bother with it. Am I supposed to use the clang developers mailing
list instead ? Am I supposed to email some developer in particular ?


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