The following additional functions are available on OpenVMS Alpha
    and Integrity servers Version 8.2 and higher:

    clearerr_unlocked    feof_unlocked
    ferror_unlocked      fgetc_unlocked
    fputc_unlocked       flockfile
    ftrylockfile         funlockfile
    getc_unlocked        getchar_unlocked
    putc_unlocked        putchar_unlocked
    statvfs              fstatvfs
    _glob32              _glob64
    _globfree32          _globfree64
    socketpair