A variable controlling whether to use the classic /dev/input/js* joystick interface or the newer /dev/input/event* joystick interface on Linux
Defined in SDL_hints.h
#define SDL_HINT_LINUX_JOYSTICK_CLASSIC "SDL_LINUX_JOYSTICK_CLASSIC"
This variable can be set to the following values:
By default the /dev/input/event* interfaces are used