al_init_ttf_addon - Allegro 5 API

       Call  this  after  al_init_font_addon(3alleg5)  to  make al_load_font(3alleg5) recognize “.ttf” and other
       formats supported by al_load_ttf_font(3alleg5).

       Returns true on success, false on failure.

Allegro reference manual                                                              al_init_ttf_addon(3alleg5)

       al_init_ttf_addon - Allegro 5 API

              #include <allegro5/allegro_ttf.h>

              bool al_init_ttf_addon(void)