I wanted to run olvwm on Linux (when it went out of support on Ubuntu 16.04) and I'd managed to get this running on Ubuntu 20.04 (and more recently on Gentoo, as documented at https://ces.mataroa.blog/blog/gentoo-olvwm-bye-ubuntu/).
A survey of available olwvm implementations available on github at the time I created the repo is in the README of https://github.com/olvwm/xview/
Currently this works on an ancient 32-bit laptop (running NixOS 22.05 as documented in https://ces.mataroa.blog/blog/distro_hoppingmd/) as well.
And thank you so much for tribblix; I was about to give up on illumos after repeated trouble installing OpenIndiana on my laptop (Tribblix worked out of the box on the hardware). I’ve since picked up a copy of “Solaris Internals” and have spent some time appreciating Solaris. Kudos.
But there is a 64-bit port (which I ought to bring in to Tribblix)
https://github.com/ggodd/xview-64bit