The issue w/ MSVC is not that specific to CPython. It is generally quite hard to write libraries which use multiple C runtimes (Windows or not -- it just happen

The issue w/ MSVC is not that specific to CPython. It is generally quite hard to write libraries which use multiple C runtimes (Windows or not -- it just happens to be much more common on Windows than on Unix). I would be actually very surprised if that problem did not exist with any other language that distribute binaries. Note that the problem you mentioned w/ python 2.7 is gone: MS has made a .msi available free of charge to build C extensions for 2.7, indefinitely (thanks to Steve Dower): https://www.microsoft.com/en-gb/download/details.aspx?id=44266 https://www.microsoft.com/en-gb/download/details.aspx?id=442...