allegro_404_char(3) - Linux man page
Name
allegro_404_char - Character used when Allegro cannot find a glyph.Synopsis
#include <allegro.h>extern int allegro_404_char;
Description
When Allegro cannot find a glyph it needs in a font, it will instead output the character given in allegro_404_char. By default, this is set to the caret symbol, '^', but you can change this global to use any other character instead. Example:/* Show unknown glyphs with an asterisk. */ allegro_404_char = '*';