/OPTION_FILE[=file-spec]
       /NOOPTION_FILE (default)

    CHBUILD can optionally produce an option file that contains
    correct table sizes to hold the conversion tables which were
    just compiled (plus a little room for growth). The /OPTION_FILE
    qualifier causes this file to be output. By default, this file
    is the file pointed to by the logical PMDF_CHARSET_OPTION_FILE,
    normally PMDF_TABLE:OPTION_CHARSET.DAT. The value on the /OPTION_
    FILE qualifier may be used to specify an alternate file name. If
    the /NOOPTION_FILE qualifier is given, then no option file will
    be output.

    CHBUILD always reads any option file that is already present via
    the PMDF_CHARSET_OPTION_FILE logical name; use of this qualifier
    will not alter this behavior. However, use of the /MAXIMUM
    qualifier causes CHBUILD to read options from MAXIMUM_CHARSET.DAT
    in addition to PMDF_CHARSET_OPTION_FILE. This file specifies near
    maximum table sizes. Only use this qualifier if the current table
    sizes are inadequate, and only use it to create a new option
    file. The /NOIMAGE qualifier should always be specified when
    /MAXIMUM is specified since a maximum-size image would be truly
    enormous and extremely wasteful.