Is your feature request related to a problem? Please describe.
Please read this thread.
Basically, for Linux-based retro consoles with no keyboard that comes with a builtin XBox360-type controller, without Plombo's code there is no way to map the controller.
Describe the solution you'd like
Apparently, that code auto-maps the XBox360 controller when a game starts.
Describe alternatives you've considered
Creating a default.cfg file in Linux and copy+paste it to the console.