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A variable that lets you manually hint extra gamecontroller db entries.
Defined in [SDL_hints.h](https://github.com/libsdl-org/SDL/blob/SDL2/include/SDL_hints.h), but apps should _only_ `#include "SDL.h"`!
#define SDL_HINT_GAMECONTROLLERCONFIG "SDL_GAMECONTROLLERCONFIG"
The variable should be newline delimited rows of gamecontroller config data, see SDL_gamecontroller.h
This hint must be set before calling SDL_Init(SDL_INIT_GAMECONTROLLER) You can update mappings after the system is initialized with SDL_GameControllerMappingForGUID() and SDL_GameControllerAddMapping()
By default no extra gamecontroller db entries are specified.
CategoryAPI, CategoryAPIMacro, CategoryDefine, CategoryHints, CategoryDraft