It's seems like force feedback are not supported , when build sdl2 with haptic support , if I try to add SDL_INIT_HAPTIC in the SDL_Init() , I get the following error: (SDL_GetError())
SDL not built with haptic (force feedback) support.
Maybe it's just a problem in make config menu(like SDL_HAPTIC checked but not compiled).
Right now, the haptic API is not supported on FreeBSD, since it relies on Linux-specific input events. It's not an issue of the port.