From https://bugs.python.org/issue25251#msg251758

Hi distutils. I previously used compiler=mingw32 with success. Today I installed Visual Studio 2015. Now compiler=mingw32 gives me an error

File "c:\python35\lib\distutils\cygwinccompiler.py", line 86, in get_msvcr raise ValueError("Unknown MS Compiler version %s " % msc_ver) ValueError: Unknown MS Compiler version 1900

Any ideas? I don't understand why what msvc I have installed affects build with mingw32

This code still exists in https://github.com/pypa/setuptools/blob/main/setuptools/_distutils/cygwinccompiler.py