A variable controlling whether joysticks on Linux will always treat 'hat' axis inputs (ABS_HAT0X - ABS_HAT3Y) as 8-way digital hats without checking whether they may be analog.
Defined in SDL_hints.h
#define SDL_HINT_LINUX_DIGITAL_HATS "SDL_LINUX_DIGITAL_HATS"
This variable can be set to the following values: