[Raion]

I've been studying a lot about IRIX's native toolkit, Motif, and the related Viewkit. I am thus going to be getting all of these resources in one place, in hopes it saves someone else some time:

Documentation

Try these resources: 

https://www.cs.nmsu.edu/~rth/cs/cs177/s9...oUIL2.html

http://users.cs.cf.ac.uk/Dave.Marshall/X_lecture/

https://www.oreilly.com/openbook/motif/vol6a/Vol6a.pdf

GUI Design

If you don't want to manually have to code your GUI, you have two options:

1. RapidApp (will be on the FTP soonish, I keep forgetting to put it up)
2. EasyMotif: https://sourceforge.net/projects/easymotif

Both focus on the GUI widgets and aspects.

Bindings

Motif is a C-based toolkit. So it doesn't have C++ bindings.

The original Motif: https://sourceforge.net/projects/motif/

ViewKlass, a Viewkit implementation: http://viewklass.sourceforge.net/todo.html

Viewkit, the original is included with IRIX: https://techpubs.jurassic.nl/manuals/065...index.html 

Notes

Motif predates much of the standardization of Unicode, UTF-8, internationalization support, and especially things like C++11, C11 etc. This may or may not impact how you program it, and it's still certainly possible to write a unicode-aware application in it. There's just not much in the way of standardization.

Motif documentation is more "paper" than "web". There may be other things I could add to this, certainly don't hesitate to let me know.