> MSYS2 CLANG64

I get your point. Although my point is that there is actually zero need for MSYS at all for this, even as a developer, and especially not with the 'CLANG64' environment. These binaries themselves are built to run in the MSYS2 environment This is how I cross-compile from Windows... to Windows with LLVM-MinGW[1]:

  > (gci Env:PATH).Value.Split(';') | sort
  > clang-21.exe --version
  clang version 21.1.2 (https://github.com/llvm/llvm-project.git b708aea0bc7127adf4ec643660699c8bcdde1273)
  Target: x86_64-w64-windows-gnu
  Thread model: posix
  InstalledDir: C:/Users/dpdx/AppData/Local/Microsoft/WinGet/Packages/MartinStorsjo.LLVM-MinGW.UCRT_Microsoft.Winget.Source_8wekyb3d8bbwe/llvm-mingw-20250924-ucrt-x86_64/bin
  Configuration file: C:/Users/dpdx/AppData/Local/Microsoft/WinGet/Packages/MartinStorsjo.LLVM-MinGW.UCRT_Microsoft.Winget.Source_8wekyb3d8bbwe/llvm-mingw-20250924-ucrt-x86_64/bin/x86_64-w64-windows-gnu.cfg