typedefTypedefVar := C.MySigned2_t(5)

	// all three should be considered identical to `long`
	if ret := C.takes_long(longVar); ret != 9 {
		t.Errorf("got %v but expected %v", ret, 9)
	}
	if ret := C.takes_long(typedefVar); ret != 16 {
		t.Errorf("got %v but expected %v", ret, 16)
	}
	if ret := C.takes_long(typedefTypedefVar); ret != 25 {
		t.Errorf("got %v but expected %v", ret, 25)
	}