The MESSAGEs should display automatically when you install packages... I'm surprised to see that you haven't encountered them yet.
Anyway, that GitHub thread talks about JIT compilation, so I would have recommended that you run
paxctl +m on the Dolphin executable, but it seems that we've been taking care of that automatically already. https://github.com/NetBSD/pkgsrc/blob/trunk/emulators/dolphin-emu/Makefile#L43-L45
HOWEVER, pkgsrc doesn't use this 'project-slippy/Ishiiruka.git' version of the code. We're using the code at dolphin-emu/dolphin.git. I'm not sure what the relationship between the 2 codebases is, but my guess is that
dolphin-emu/dolphin not having had a formal release since 2016 (!!) is what's motivated this "Ishiruuka" thing -- which had a new release just a couple of weeks ago.
I wonder if it makes sense for the
emulators/dolphin-emu package to use the "Ishiiruka" code base going forward. I might even try to make a package for "Ishiiruka" and put it in
wip and we could see if it makes a difference.