Provided by: libsdl3-doc_3.2.20+ds-2_all 

NAME
SDL_HINT_GAMECONTROLLERCONFIG_FILE - A variable that lets you provide a file with extra gamecontroller db
entries.
SYNOPSIS
#include <SDL3/SDL_hints.h>
#define SDL_HINT_GAMECONTROLLERCONFIG_FILE "SDL_GAMECONTROLLERCONFIG_FILE"
DESCRIPTION
The file should contain lines of gamecontroller config data, see SDL_gamepad.h
You can update mappings after SDL is initialized with SDL_GetGamepadMappingForGUID() and
SDL_AddGamepadMapping()
This hint should be set before SDL is initialized.
AVAILABILITY
This hint is available since SDL 3.2.0.
Simple Directmedia Layer SDL 3.2.20 SDL_HINT_GAMECONTROLLERCONFIG_FILE(3)