Function gio_sys::g_application_add_main_option

pub unsafe extern "C" fn g_application_add_main_option(
    application: *mut GApplication, 
    long_name: *const c_char, 
    short_name: c_char, 
    flags: GOptionFlags, 
    arg: GOptionArg, 
    description: *const c_char, 
    arg_description: *const c_char
)