I hope you will stick with XView and not divert efforts into Motif
support. As I understand it, a GDE user would not be able to compile
a Motif-based GDE without having Motif binary libraries and header
files. This might require the purchase of some sort of Motif
developer's kit. Motif source code is not available without a special
license from OSF. On the other hand an XView implementation is freely
available from MIT, just as X itself is.
bashford at scripps.edu