Why Mingw32 is not recognized automatically when MSVC is not found and the variable CC / CCX are set?

[mattia-donato]

I am trying to install the pypi package "ultradict". I am using pip install ultradict in a venv in Windows OS. I have installed mingw32 and I set environments variable it in the PATH and in CC / CXX. I do not understand why I get the error Microsoft Visual Studio 14 not found. Instead if manually I use python setup.py build_ext --inplace -compiler=mingw32 -DMS_WIN64 the compilation is possible. Where is the problem?

[abravalheri]

Hi @mattia-donato, please note that the compilation in MinGW is not fully flashed out yet.
You can have a look on pypa/distutils#184 for more info. There might be other open issues in the pypa/distutils repository as well.