[Groff] `groff' options for other programs

[Bernd Warken]

`grog' and `groffer' (maybe something else in the future) need the
information of the options used by `groff'.

I wrote a Perl program `read_groff_options.pl' being stored in
`<groff_top_dir>/src/roff/groff'.  In this directory there is also
the file `groff.cpp'.

The Perl program reads from `groff.cpp' the function `synopsis'
that contains information of the `groff' options.  From this
there information, a 2-liner is created and written to STDOUT.
The actual output reads:

noarg: abceghijklpstvzCENRSUVXZ
witharg: FmTfwWMdrnoPDKLI

That information can easily used by Perl.  So `grog' and `groffer'
can run `read_groff_options.pl' before the run of `make' and
process its output.

By the run of `make', `read_groff_options.pl' is run and its output
is stored into the file `groff_options.info'.  By `make install',
this output file isx stored in the `groff libdir'.  After the
`make' installation, this output file can be used by `grog' and
`groffer' without using `read_groff_options.pl'.

Is there any trouble with this concept?

Bernd Warken