Function fltk_sys::menu::Fl_Menu_Button_add

pub unsafe extern "C" fn Fl_Menu_Button_add(
    arg1: *mut Fl_Menu_Button,
    name: *const c_char,
    shortcut: c_int,
    arg2: Fl_Callback,
    arg3: *mut c_void,
    arg4: c_int
) -> c_int