al_load_config_file - Allegro 5 API

       Read  a  configuration  file  from  disk.   Returns NULL on error.  The configuration structure should be
       destroyed with al_destroy_config(3alleg5).

       al_load_config_file - Allegro 5 API

al_load_config_file_f(3alleg5), al_save_config_file(3alleg5)

Allegro reference manual                                                            al_load_config_file(3alleg5)

              #include <allegro5/allegro.h>

              ALLEGRO_CONFIG *al_load_config_file(const char *filename)