bug#6505: make the Gtk+ port compile with -DGSEAL_ENABLE in preparation for Gtk+-3

[Dan Nicolaescu <dann@gnu.org>]

Jan Djärv <jan.h.d@swipnet.se> writes:

> Dan Nicolaescu skrev 2010-06-24 20.34:
>>
>> Gtk+-3 will make some structure members private.
>>
>> Compiling with -DGSEAL_ENABLE points out the problems.
>>
>> See also http://live.gnome.org/GnomeGoals/UseGseal
>> for more info
>>
>>
>
> It is currently not an issue, configure checks for gtk+-2.0, so 3.0
> isn't considered yet.  Also, other libraries (rsvg, gconf possibly
> dbus) must also be moved forward.
>
> Apart from that, it is the question of how old Gtk+ we should
> support. Currently we say 2.6 (which is really old) or newer.  Most
> accessor functions in Gtk+ where introduced in 2.14, some in 2.16, and
> in one case, 2.20.
>
> We could add #ifdef:s, but I rather not do that unless we really need to.
>
> That said, I have a private branch that works with Gtk+ 3.0, and some
> of the fixes there can go in the trunk.  Maybe we should bump required
> to 2.14 and get most of the work checked in.

Good to hear you already have some solution.
IMHO the main thing is that emacs should not be seen as lagging
behind.  When the first distribution switches to version 3, it would be
good to have something available...