Windows, mingw32, and the MSVC linker used (while it should not be)?

[lgautier]

Hi,

I am unsuccessfully trying to get setuptools to use minw32 on a Windows build pipeline.

The command line used is:

python -m build -C--global-option=--verbose -C--build-option="build --compiler=mingw32 --force" -o dist/ --wheel .

MingW is installed, and it is earlier in the PATH than any executable from MSVC toolchain. However, the call fails with a mention of MSVC's LINK.exe being used (while it should not):

'C:\\Program Files\\Microsoft Visual Studio\\2022\\Enterprise\\VC\\Tools\\MSVC\\14.42.34433\\bin\\HostX86\\x64\\link.exe'

(see https://github.com/rpy2/rpy2/actions/runs/12107597982/job/33754662287?pr=1128#step:6:68).

What am I missing?