The following additional functions are available on OpenVMS VAX
    and OpenVMS Alpha Version 7.2 and higher:

       asctime_r      ctime_r     decc$set_child_standard_streams
       decc$write_eof_to_mbx      decc$validated lclose
       dlerror        dlopen      dlsym
       fcntl          gmtime_r    localtime_r
       wchar