pub unsafe extern "C" fn g_assertion_message_cmpstr(
    domain: *const c_char,
    file: *const c_char,
    line: c_int,
    func: *const c_char,
    expr: *const c_char,
    arg1: *const c_char,
    cmp: *const c_char,
    arg2: *const c_char
)