Cristian Adam 9449bfbf04 CMake: Fix build with MSVC 2019 and Qt 6.2 ...

Qt 6.2 requires __cplusplus preprocessor set to at least 201703L

According to https://docs.microsoft.com/en-us/cpp/build/reference/zc-cplusplus
one needs to add the compiler flag /Zc:__cplusplus

CMake doesn't set the flag, there is an issue opened at
https://gitlab.kitware.com/cmake/cmake/-/issues/18837

This flag is passed to any target that links to Qt6::Core, unless
the flags are not manually copied for some reason.

Task-number: QTCREATORBUG-25730
Change-Id: I271e85fe857b5d4ac8980f77c723e5704a8eb743
Reviewed-by: Eike Ziller <eike.ziller@qt.io>
Reviewed-by: Alessandro Portale <alessandro.portale@qt.io>

2021-05-21 14:02:33 +00:00

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