[Development] Requiring minimum GCC 7/MinGW (was: Dropping MinGW support in Qt 6 (Was: HEADS-UP: QStringLiteral))

[Ray Donnelly]

On Fri, 23 Aug 2019, 17:11 Thiago Macieira, <thiago.macieira at intel.com>
wrote:

> On Friday, 23 August 2019 00:12:50 PDT Roland Winklmeier wrote:
> > Just for your awareness: There is an old bug related to thread_local in
> > MinGW which afaik was never fixed. It compiles correctly, but every
> > executable crashes during shutdown. Not sure if this relevant in this
> case,
> > just mentioning it:
> > https://github.com/msys2/MINGW-packages/issues/2519
>
> The description of the bug says "winpthreads", which means it's not MinGW,
> it's Cygwin/MSYS2.


This is completely incorrect. Thiago I would expect better from you.


> libgcc on pure MinGW doesn't use winpthreads, it uses Win32.
>
> Anyway, let's apply Q_THREAD_LOCAL. If that causes GCC-built MinGW
> applications to crash on exit, then we stop using GCC and switch to Clang.
>
> --
> Thiago Macieira - thiago.macieira (AT) intel.com
>   Software Architect - Intel System Software Products
>
>
>
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