[johnnym]

Made some progress since my last post:

Guess what: if you do not intend to build LLVM/clang for OpenBSD/sgi userlands, you can do the whole userland build on a dual 300 MHz R12K driven Octane with 2 GiB of RAM in just a little more than 12 hours! Much better than 110 hours plus extra (for the parts that were not build after I did not continue the build process).

It then took another 10 hours to make the actual release files (sets, kernels (needed to be made again, respective Makefile patched to make use of the second processor), RAMdisk kernels (repective Makefile unfortunately not yet patched, so needed extra time for this run because it was done in serial), boot loaders and CDROM ISO) out of the userland created earlier.

So I now have an OpenBSD/sgi 7.0 userland available which includes the usual files (minus X) that were available in the past, e.g. on https://ftp.eu.openbsd.org/pub/OpenBSD/6.9/sgi/

I still need to test this, but at least during compilation of the files for the userland and release LLVM/clang wasn't needed, so it might indeed be save to do without on OpenBSD/sgi.

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I'm afraid I don't have an understanding of what the problem is then.

Oh, ok, I thought I did provide a good description on https://github.com/the-machine-hall/openbsd-src/issues. Well, it's not IRIX, of course and I might also be bad in explaining things. 

OpenBSD is not something I run regularly, so I'm not familiar with the nuances of it because a lot of it feels really primitive

This is actually what mainly adds to the charm of it. Its simpleness greatly helps to understand its workings. The complexity of common GNU/Linux distributions is no comparison in this regard.

but would it be out of the question to perhaps try to ask on their mailing list and see if they can advise further?

Well, in the end I might do that, but I don't expect to get too much - if any - support there, because they already have enough to do with the architecture ports they offer and support. And running a reinstated port based on reverts and adaptations voids their warranty at multiple places I think. 

It's a shame there's no more bitrig or other OpenBSD forks worth a damn, maybe you could have found somebody willing to help you with the maintenance

Indeed. Actually I also came here (and also to the sgi.sh forums) with this topic because I'm in need of testers for all the machinery I don't have available. Hence I'd be really grateful for people with the following machines:

• Tezro (uses the IP27 kernels)
  
• Fuel (dito)
  
• Origin 350 (dito)
  
• R12K O2 (uses the IP32 kernels)
  
• R4K Indigo² (uses the IP22 kernels)
  
• R8K Indigo² (uses the IP26 kernels)
  
• R5K Indy (uses the IP22 kernels)
  
• R4K Indigo (dito)
  

...to test the kernels (and in the future also userlands) I have available on GitHub (linked from the original post).