Man pages matching name destroy_zbuffer in section 3alleg4:

destroy_zbuffer.3alleg4.en	debian 10 / allegro4-doc
destroy_zbuffer.3alleg4.en	debian 11 / allegro4-doc
destroy_zbuffer.3alleg4.en	debian 12 / allegro4-doc
destroy_zbuffer.3alleg4.en	debian 13 / allegro4-doc