[Development] Raising the minimum to C++20

[Thiago Macieira]

On Friday, 5 May 2023 09:14:35 PDT Thiago Macieira wrote:
> One, __builtin_is_constant_evaluated() works with GCC 9, Clang 10, MSVC 2019
> and even the old EDG-based Intel compiler in C++17 mode, see
>         https://gcc.godbolt.org/z/4boM5Esfx
> So we *could* just use it and damn the torpedoes. That leaves out users of
> GCC 8 (a.k.a. QNX) and the GHS compiler, who would get non-constexpr code
> generation.

https://codereview.qt-project.org/c/qt/qtbase/+/476323

-- 
Thiago Macieira - thiago.macieira (AT) intel.com
  Cloud Software Architect - Intel DCAI Cloud Engineering
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