gtk on other systems

["Derek B. Noonburg" <derekn aimnet com>]

I'm looking for a new X toolkit for xpdf.  I currently use my own
toolkit (LTK), which was an interesting learning experience, but I
really don't feel like maintaining Yet Another Toolkit anymore.

There are several options out there, and gtk looks pretty nice.  One
concern I have is portability.  I consider xpdf to be an X application,
not specifically a Linux app. Xpdf runs on some platforms I'd never even
heard of before; I've gone through a fair amount of trouble making LTK
portable.  Has gtk been widely ported and tested?  For example, VMS and
Digital Unix seem to be two of the most troublesome systems (for
software developed on Linux).

In particular, I noticed this:

    #define XLIB_ILLEGAL_ACCESS

in gdk.c.  Why is it there?  Will it cause problems for non-XFree86
systems?

Also in gdk.c, it looks like ConnectionNumber() is used in a core loop.
I know that this breaks under VMS.  Has anyone looked into the
alternatives?

It looks like my next best alternative is Lesstif/Motif.  I'd prefer to
go with gtk, but I know that Motif has been ported to all of these
systems.

- Derek