Hi,

I can compile a project which also contains C files when setting "no
compiler" for the C compiler and selecting "LLVM ..." for C++.
The point here is that the win32-clang-msvc mkspec contains the following
line:
QMAKE_CXXFLAGS          = $$QMAKE_CFLAGS
... which as far as I understand means that the C++ compiler is also used
for C files.

However there is the following bug in Qt Creator (which also describes how
to set up clang-cl quite well):
https://bugreports.qt.io/browse/QTCREATORBUG-19255
... which means that you'll have to re-configure the C++ compiler with
every restart of Qt Creator.

Best regards
Markus Maier


2018-03-08 8:01 GMT+01:00 Dennis Luehring <dl.so...@gmx.net>:

> Am 08.03.2018 um 07:22 schrieb Eike Ziller:
>
> >>Check if the qmake step in your build configuration includes “-spec
> win32-clang-msvc”.
> >>If not, then set “win32-clang-msvc” in the “Qt mkspec” >setting for your
> kit and try again.
> >>I suppose Qt Creator might not do that automatically in your case.
>
> is that "Qt mkspec" also working with Qbs?
>
> >>Qt 5.6 doesn’t have a mkspec for clang-cl, so you need to either create
> >>one yourself, copy one from somewhere else (they are usually not
> >>self-contained though), or use a Qt version which has one.
>
> so i think it would be better using Qt5.8 for the first tests and try to
> get back to 5.6 later
>
> what about the C compiler detection problems?
>
> (as i wrote) i've installed the current svn version of clang-cl from the
> LLVM homepage
> and my QtCreator 4.4.1 detected this C++ compiler:
>
> LLVM 64bit based on MSVC2015 | Clang
> Initalization: ...\vcvarsall.bat amd64
> LLVM: C:\Program Files\LLVM
>
> but no C compiler
>
> should i upgrade to QtCreator 4.5 or later, or is the missing C compiler
> handler by the “win32-clang-msvc” spec?
>
>
>
>
>
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