Do you mean https://gitlab.com/sse/sophos/tree/master ?

    > Sophos' dependencies need a compiler 
    > supporting C++14 (Sophos' core codebase doesn't).
    > It has been successfully built and tested on 
    > Ubuntu 14 LTS using both clang 3.6 and gcc 4.9.3 
    > and on Mac OS X.10 using clang 7.0.0

I don't see Windows mentioned anywhere.