[Rd] gnome support fail on startup (PR#426)

[Peter Dalgaard BSA]

Prof Brian D Ripley <ripley@stats.ox.ac.uk> writes:

>     o   New command line option `--gui' to specify the graphical user
>         interface under Unix.  Currently, possible values are `X11' (the
>         (default) and `GNOME', provided that GNOME support is available.
>         Command line options \`-g' and `--gnome' are defunct.
> 
> which seems clear enough to me.  -gui GNOME never existed to be
> deprecated!

Never said it did... However the point is that one gets an odd error
message if we don't catch the --gui argument, and while we're there
we might as well look for a following value.

Another options would be to have the script switch catch '--gui*'
instead of '--gui=*' and just let it barf on the absent binary. (The
sed bit should probably read sed -e 's/[^=]*=*//' then)

I'm no fan of removing short-form options in general. Whoever
disagrees should be forced to type "R --debugger=gdb" every time he
needs to restart during a bug hunt... ;)

-- 
   O__  ---- Peter Dalgaard             Blegdamsvej 3  
  c/ /'_ --- Dept. of Biostatistics     2200 Cph. N   
 (*) \(*) -- University of Copenhagen   Denmark      Ph: (+45) 35327918
~~~~~~~~~~ - (p.dalgaard@biostat.ku.dk)             FAX: (+45) 35327907
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