The following additional functions are available on OpenVMS Alpha
    Version 7.3-1 and higher:

       access     fseeko
       chmod      ftello
       chown      ftw
       fstat      readdir_r
                  stat

       vfscanf    vfwscanf
       vscanf     vwscanf
       vsscanf    vswscanf

       decc$feature_get_index
       decc$feature_get_name
       decc$feature_get_value
       decc$feature_set_value