Re: MPS: Win64 testers?

[Angelo Graziosi]

> I'm using the msys2-docker-experimental image with MSYSTEM=MINGW64. I don't 
> know whether that means I'm using UCRT, sorry. If I use MSYSTEM=UCRT64, I get 
> many more and different problems...
I build Emacs master regularly for UCRT64 using the patches that MSYS2 
people uses for Emacs 29:
https://github.com/msys2/MINGW-packages/blob/master/mingw-w64-emacs/001-ucrt.patch

https://github.com/msys2/MINGW-packages/blob/master/mingw-w64-emacs/002-clang-fixes.patch

they still applies to master (just some Hunk #1 succeeded message).

You have to build from *UCRT64 shell* or set

MSYSTEM="UCRT64"
PATH="/ucrt64/bin:$PATH"

in a build script (so, mimicking that shell). As you have seen, this 
does not produce warnings...