al_merge_config_into - Allegro 5 API

       Merge  one  configuration  structure  into  another.   Values  in  configuration  `add' override those in
       `master'.  `master' is modified.  Comments from `add' are not retained.

       al_merge_config_into - Allegro 5 API

al_merge_config(3alleg5)

Allegro reference manual                                                           al_merge_config_into(3alleg5)

              #include <allegro5/allegro.h>

              void al_merge_config_into(ALLEGRO_CONFIG *master, const ALLEGRO_CONFIG *add)