Game Controller access via SDL.
Thanks to SDL, it has been very easy to access to the Xbox controller, even on linux. The empty example of the engine shows how to do that in ogre.
https://bitbucket.org/frankiezafe/polymorph-engine/src/ > polymorph-engine / empty.2.0 / app / input /
The sources also includes a FindSDL2.cmake, who makes integration in ogre’s cmakes much more natural.