[Development] C++20 comparisons @ Qt (was: Re: C++20 @ Qt)

[Thiago Macieira]

On Tuesday, 7 November 2023 09:07:10 PST Marc Mutz via Development wrote:
> To be clear: This is not about Qt compiled with C++17 used in projects
> compiled with C++20. This is about one .cpp file being compiled with
> C++17 and another .cpp file from, broadly speaking, the same cmake
> target, in C++20 (static builds are different; there, the whole
> application incl. all "statically-linked libraries", is one executable).

No, it's not. See my reply. Your answer still applies, just that it gets 
bigger so:

> 1. Ban mixing different C++ versions in the same executable (= cmake
> target).
> 
> This is probably the safest. If we allowed this instead, we'd need to
> review all of our APIs to see whether we have a similar issue already.

You must remove "cmake target" portion. This applies to the executable as 
loaded into memory.

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