The following functions are available on all OpenVMS VAX, Alpha,
    and Integrity servers versions:

       abort         abs           access      acos
       alarm         asctime       asin        assert
       atan2         atan          atexit      atof
       atoi          atoll (Alpha) atol        atoq (Alpha)
       box           brk           bsearch     cabs
       calloc        ceil          cfree       chdir
       chmod         chown         clearerr    clock
       close         cosh          cos         creat
       ctermid       ctime         cuserid     decc$crtl_init
       decc$fix_time     decc$from_vms      decc$match_wild
       decc$record_read  decc$record_write  decc$set_reentrancy
       decc$to_vms       decc$translate_vms
       delete        delwin        difftime    div
       dup2          dup           ecvt        endwin
       execle        execlp        execl       execve
       execvp        execv         exit        _exit
       exp           fabs          fclose      fcvt
       fdopen        feof          ferror      fflush
       fgetc         fgetname      fgetpos     fgets
       fileno        floor         fmod        fopen
       fprintf       fputc         fputs       fread
       free          freopen       frexp       fscanf
       fseek         fsetpos       fstat       fsync
       ftell         ftime         fwait       fwrite
       gcvt          getchar       getcwd      getc
       getegid       getenv        geteuid     getgid
       getname       getpid        getppid     gets
       getuid        getw          gmtime      gsignal
       hypot         initscr       isalnum     isalpha
       isapipe       isascii       isatty      iscntrl
       isdigit       isgraph       islower     isprint
       ispunct       isspace       isupper     isxdigit
       kill          labs          ldexp       ldiv
       llabs (Alpha) lldiv(Alpha)  localeconv  localtime
       log10         log           longjmp     longname
       lseek         lwait         malloc      mblen
       mbstowcs      mbtowc        memchr      memcmp
       memcpy        memmove       memset      mkdir
       mktemp        mktime        modf        mvwin
       mv[w]addstr   newwin        nice        open
       overlay       overwrite     pause       perror
       pipe          pow           printf      putchar
       putc          puts          putw        qabs (Alpha)
       qdiv (Alpha)  qsort         raise       rand
       read          realloc       remove      rename
       rewind        sbrk          scanf       scroll
       setbuf        setgid        setjmp      setlocale
       setuid        setvbuf       sigblock    signal
       sigpause      sigstack(VAX) sigvec      sinh
       sin           sleep         sprintf     sqrt
       srand         sscanf        ssignal     stat
       strcat        strchr        strcmp      strcoll
       strcpy        strcspn       strerror    strftime
       strlen        strncat       strncmp     strncpy
       strpbrk       strrchr       strspn      strstr
       strtod        strtok        strtoll     strtol (Alpha)
       strtoq (Alpha) strtoull (Alpha)  strtoul  strtouq (Alpha)
       strxfrm       subwin        system      tanh
       tan           times         time        tmpfile
       tmpnam        toascii       tolower     _tolower
       touchwin      toupper       _toupper    ttyname
       umask         ungetc        vaxc$calloc_opt vaxc$cfree_opt
       vaxc$crtl_init    vaxc$establish vaxc$free_opt vaxc$malloc_opt
       vaxc$realloc_opt  va_arg    va_count    va_end
       va_start      va_start_1    vfork       vfprintf
       vprintf       vsprintf      wait        wcstombs
       wctomb        write         [w]addch    [w]addstr
       [w]clear      [w]clrattr    [w]clrtobot [w]clrtoeol
       [w]delch      [w]deleteln   [w]erase    [w]getch
       [w]getstr     [w]inch       [w]insch    [w]insertln
       [w]insstr     [w]move       [w]printw   [w]refresh
       [w]scanw      [w]setattr    [w]standend [w]standout