Message 123943 - Python tracker
The soabi tag could be useful on Windows as well, for example if some package maintainer chooses another version of the compiler, or a custom version of MSVCRT. And FWIW, PyPy currently uses "--soabi=pypy-1.4" on all platforms: "import foo" will load foo.pypy-14.so (foo.pypy-14.pyd on Windows). There are also some specific abiflags. A difference is that PyPy will also ignore the default foo.so, because extension modules built for CPython will likely crash with PyPy.