This is a well-known FSF policy. The rationale is that if the FSF
hosts a project it wants to be able
to defend it in court against GPL violations. It cannot do that
if it doesn't hold the copyright.
I
I clicked "send" too quickly. I still wanted to say that I am just
explaining FSF policy. I don't
have an opinion if it suitable for xboard to be an FSF project or not.
On the technical side I wonder if there is smoother migration path Xt-->gtk.
I.e. slowly replacing Xt widgets by gtk widgets (the file selector would
be an obvious candidate).
xboard will look ugly for a while but at least it would not be an all or
nothing thing.
I guess first the Xt main loop would have to be replaced by the gtk
mainloop. The question then
is if it is possible to integrate Xt widgets in the gtk main loop. I
don't know enough about the
inner workings of either toolkit to see if this is feasible. Perhaps
this might help.
http://www.gnomefiles.org/app.php/gtk-Xt
Michel