panic("cgo stub: cgo not available")
}

func cgoLookupIP(ctx context.Context, network, name string) (addrs []IPAddr, err error) {
	panic("cgo stub: cgo not available")
}

func cgoLookupCNAME(ctx context.Context, name string) (cname string, err error, completed bool) {
	panic("cgo stub: cgo not available")
}

func cgoLookupPTR(ctx context.Context, addr string) (ptrs []string, err error) {

}

func (r *Resolver) lookupCNAME(ctx context.Context, name string) (string, error) {
	order, conf := systemConf().hostLookupOrder(r, name)
	if order == hostLookupCgo {
		if cname, err, ok := cgoLookupCNAME(ctx, name); ok {
			return cname, err
		}
	}
	return r.goLookupCNAME(ctx, name, order, conf)
}

func (r *Resolver) lookupSRV(ctx context.Context, service, proto, name string) (string, []*SRV, error) {

	}
	if ip6 := ip.To16(); ip6 != nil {
		return cgoSockaddrInet6(ip6, zoneCache.index(zone)), _C_socklen_t(syscall.SizeofSockaddrInet6)
	}
	return nil, 0
}

func cgoLookupCNAME(ctx context.Context, name string) (cname string, err error, completed bool) {
	resources, err := resSearch(ctx, name, int(dnsmessage.TypeCNAME), int(dnsmessage.ClassINET))
	if err != nil {
		return
	}