[Development] Let's drop MSVC 2019 for dev (6.8)

[Thiago Macieira]

On Monday, 5 February 2024 01:44:29 PDT Allan Sandfeld Jensen wrote:
> I was trying to drop support for it in qtwebengine in 6.7, but the problem
> was it was still used for qt packaging. But if we could at least switch
> packing to vs2022, it would mean we could drop it in QWE.

Can we commit to this ASAP after the 6.7 release? We'll revisit later in the 
cycle whether we still need 2019. Do note that Microsoft is preparing the next 
release after 2022, as seen by their shipping 17.0 Tech Previews.

Jörg accidentally broke the C++ language level set up in dev, meaning we 
didn't test C++20 mode with 2019 for a day or so, and some changes that 
trigger 2019's broken C++20 support went in. If we don't drop 2019 by 6.8 
release, we should force it to only compile in C++17 mode.

-- 
Thiago Macieira - thiago.macieira (AT) intel.com
  Principal Engineer - Intel DCAI Cloud Engineering
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