[Interest] Problems with Clang 3.9 and Qt 5.8 preBeta

[Oliver Niebuhr]

Hmm I thought Clang would be more stable now. Yeah I am just a
Amateur/Hobby Developer. Fixing Compiler Bugs is a little over my Head
still.

Anyway thanks for your time.
Oliver

On 02.10.2016 22:51, Thiago Macieira wrote:
> On domingo, 2 de outubro de 2016 18:03:56 MDT Oliver Niebuhr wrote:
>> Hello.
>>
>> I heard a lot of good things about Clang and decided to try it out.
>> This are my very first steps but yes, I read a lot on the interwebs
>> already
>>
>> My Problems are:
>> 1.) I am not 100percent sure how to setup MSVC/Clang correctly. There
>> are many outdated posts, so i hopefully got a lot closer with my current
>> configure parameters. And the ones I found in the Qt Forum are mostly
>> saying "...you should ask on the Mailing List..."
> 
> The current answer for you is "don't". Clang-cl is not stable enough for you 
> to try it, unless you're either a Clang developer who can fix the compiler to 
> make it stop crashing, or a Qt developer who can modify the source code to see 
> what was the reason Clang crashed, then create a bug report for Clang 
> developers to fix their compiler.
> 
> Since this email was sent to the Qt interest mailing list, you're probably 
> neither. At this time, I advise you to wait a little more (maybe a year or 
> two).
> 
>> 2.) As Qt 5.8 has of course a lot of Bugs left, I am not sure if the
>> Clang Error is related to a) my configure parameters b) Clang 3.9 or c)
>> a Bug in the Qt Framework.
> 
> If you're using clang-cl, there's a better-than-90% chance it's Clang's fault. 
> I fixed the remaining issues that were Qt's fault two months ago or so, then 
> stopped when I ran into internal compiler errors.
> 
>> In file included from ..\include\QtCore\5.8.0\QtCore\private/qvariant_p.h:1:
>> ..\include\QtCore\5.8.0\QtCore\private/../../../../../../../qt5srcgit/qt5/q
>> tbase/src/corelib/kernel/qvariant_p.h(433,27): error: use of overloaded
>> operator '<<' is ambiguous (with operand types 'QDebug' and 'nullptr_t')
>> dbg.nospace() << *v_cast<T>(d);
>> ~~~~~~~~~~~~~ ^  ~~~~~~~~~~~~~
> 
> This one could be a compiler bug, a Qt bug, or a mistake in setting up your 
> MSVC / Clang environment. Since there are no instructions for the latter, if 
> you try it, you're on your own. It looks, somehow, that commit 
> b5153d5bfab63da811b7a4615238d9e50198b412 is the cause (which is exactly the 
> one of the two or three commits I made to make Clang-cl 3.8 work a couple of 
> months ago), which means Microsoft headers did not define _HAS_NULLPTR_T. You 
> get to investigate further.
> 


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