al_install_joystick - Allegro 5 API

       Install  a  joystick  driver,  returning true if successful.  If a joystick driver was already installed,
       returns true immediately.

       al_install_joystick - Allegro 5 API

al_uninstall_joystick(3alleg5)

Allegro reference manual                                                            al_install_joystick(3alleg5)

              #include <allegro5/allegro.h>

              bool al_install_joystick(void)