GLIBC_2.0 {
  global:
    _nss_dns_gethostbyaddr_r; _nss_dns_gethostbyname2_r;
    _nss_dns_gethostbyname_r; _nss_dns_getnetbyaddr_r;
    _nss_dns_getnetbyname_r;

  local:
    *;
};