The patch from Gentoo Prefix removed .so as a valid C library suffix, which makes it unable to load such a C library. At least YouCompleteMe is producing a Python C library with .so extension, makes it a bit hassle to use with vim from Gentoo Prefix. Relevant discussion https://github.com/Valloric/ycmd/issues/512
guess we can do that
I've pushed this. Please sync in a short while and re-emerge python and test back.