I get an error about a duplicate definition of the "_main" symbol!

Description

I get an error about a duplicate definition of the "_main" symbol!
You are probably on a Darwin/MacOS X system. If so, make sure the symbol USE_CONSOLE is not defined in your program: it is a deprecated symbol that must be replaced by ALLEGRO_USE_CONSOLE. Also note that the magic main can't be disabled on such a system: you simply can't define the symbol ALLEGRO_NO_MAGIC_MAIN in a program linked against Allegro.