The following additional functions are available on OpenVMS VAX
    and OpenVMS Alpha Version 7.0 and higher:

       basename     bcmp         bcopy        btowc
       bzero        closedir     confstr      dirname
       drand48      erand48      ffs          fpathconf
       ftruncate    ftw          fwide        fwprintf
       fwscanf      getclock     getdtablesizegetitimer
       getlogin     getpagesize  getpwnam     getpwuid
       gettimeofday index        initstate    jrand48
       lcong48      lrand48      mbrlen       mbrtowc
       mbsinit      mbsrtowcs    memccpy      mkstemp
       mmap         mprotect     mrand48      msync
       munmap       nrand48      opendir      pathconf
       pclose       popen        putenv       random
       readdir      rewinddir    rindex       rmdir
       seed48       seekdir      setenv       setitimer
       setstate     sigaction    sigaddset    sigdelset
       sigemptyset  sigfillset   sigismember  siglongjmp
       sigpending   sigprocmask  sigsetjmp    sigsuspend
       srand48      srandom      strcasecmp   strdup
       strfmon      strncasecmp  strsep       swab
       swprintf     swscanf      sysconf      telldir
       tempnam      towctrans    truncate     tzset
       ualarm       uname        unlink       unsetenv
       usleep       vfwprintf    vswprintf    vwprintf
       wait3        wait4        waitpid      wcrtomb
       wcsrtombs    wcsstr       wctob        wctrans
       wmemchr      wmemcmp      wmemcpy      wmemmove
       wmemset      wprintf      wscanf