glibc/resolv/Versions

libc {
  GLIBC_2.0 {
    # global variables
    _h_errno; _res;

    # helper functions
    __h_errno_location;

    # functions used in other libraries
    __res_randomid;

    # variables in normal name space
    h_errlist; h_errno; h_nerr;

    # h*
    herror; hstrerror;

    # r*
    res_init;
  }
  GLIBC_2.2 {
    # r*
    __res_state; __res_ninit;
  }
}

libresolv {
  GLIBC_2.0 {
    _gethtbyaddr; _gethtbyname; _gethtbyname2; _gethtent; _getlong;
    _getshort; _res_opcodes; _res_resultcodes; _sethtent; dn_expand;
    inet_net_ntop; inet_net_pton; inet_neta; res_gethostbyaddr;
    res_gethostbyname; res_gethostbyname2; res_mkquery; res_query;
    res_querydomain; res_search; res_send_setqhook; res_send_setrhook;
    # Variables
    __p_class_syms; __p_type_syms;
    # Private routines shared between libc/net, named, nslookup and others.
    __b64_ntop; __b64_pton;
    __dn_comp;  __dn_count_labels; __dn_skipname;
    __fp_nquery; __fp_query; __fp_resstat; __hostalias;
    __loc_aton; __loc_ntoa;
    __p_cdname; __p_cdnname; __p_class; __p_fqname; __p_fqnname; __p_option;
    __p_query; __p_rr; __p_secstodate; __p_time; __p_type;
    __putlong; __putshort;
    __res_close; __res_dnok; __res_hnok; __res_isourserver; __res_mailok;
    __res_nameinquery; __res_ownok; __res_queriesmatch;
    __res_send;
    __sym_ntop; __sym_ntos; __sym_ston;
  }
  GLIBC_2.1 {
    # Needed in libnss_dns.
    __ns_name_unpack; __ns_name_ntop;
  }
  GLIBC_2.2 {
    __res_nmkquery; __res_nquery; __res_nquerydomain; __res_nsearch;
    __ns_get16;
}

libnss_dns {
  GLIBC_2.0 {
    _nss_dns_gethostbyaddr_r; _nss_dns_gethostbyname2_r;
    _nss_dns_gethostbyname_r; _nss_dns_getnetbyaddr_r;
    _nss_dns_getnetbyname_r;
  }
}