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
)