[Qt-creator] Dev: Raising compiler requirement for building Qt Creator

[Eike Ziller]

Hi,

we would like to raise the compiler requirements of Qt Creator 19 and later
(for compiling Qt Creator itself) to GCC 11 or later and Xcode 16 or later.
The requirement for MSVC 2022 stays the same.

697470: Raise compiler requirement for building Qt Creator | https://codereview.qt-project.org/c/qt-creator/qt-creator/+/697470

This allows us to do some experiments with coroutine based APIs like
690295: Utils: Add coroutine support for Result<>
https://codereview.qt-project.org/c/qt-creator/qt-creator/+/690295

Xcode 16 is available for macOS 14.5 and later, so macOS 14 is then required even when
compiling with Qt 6.5.3. (The deployment target, i.e. where the result runs, should not be affected.)

GCC 11 or later is available by default on Debian 12, Ubuntu 22, and RHEL/Rocky/Alma/CentOS 9. On
RHEL 8, it is available via devtoolset. Compiling on Debian 11 would no longer be supported out of
the box.

Br, Eike

-- 
Eike Ziller
Principal Software Engineer

The Qt Company GmbH
Erich-Thilo-Str. 10
12489 Berlin, Germany
eike.ziller at qt.io
https://qt.io

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