After a closer look, yeah it seems like lite-c supports it. However it didnt solve my problem. Now when I declare a var* that points to &key_w, the program crashes. For example this will crash the program:

var* lol = &key_w; (if global, and if initialized within function it still crashes.)

key_set does not suffice, since im checking keys every frame.
Maybe the key_w isnt a var? It says flag in manual, but there is no type FLAG so i dunno what to do.