Hi, it looks like you’re right that the shared_optix repo has been deleted. I’m trying to track down whether anyone has a copy of it. If I find it, I’ll post back here.
The author of the blog post said the baking sample wouldn’t be too hard to re-create manually against the current OptiX SDK, if that’s an option for you.
I do see that someone copied the shared_optix repo in 2014. It probably won’t compile against the optix_prime_baking repo without changes, but maybe it could help fill in some blanks. GitHub - calvinswaim/shared_optix: shared_optix
BTW, I am told that you may not need the shared_optix repo at all if you have the OptiX SDK installed. Apparently that repo just contained a version of OptiX. You probably do need to make some manual build tweaks, of course, but let us know if it seems like you can’t progress.