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Using an LLM to compile a list is not the best option. They absolutely do get false positives and all they're doing is is reading forum posts and other content that may be incorrect.

I'm not judging your intentions though, I'm just criticizing your methods.

Someone wanted to get Tendra on IRIX and I did at one point have a partially working PCC tool chain.

You told me above "It's a large ask" and nobody else wanted to give opinions either. So if nobody wants to talk I have to do what I can.
I asked the AI's for their confidence score to filter/reduce false statements. its not a perfect list but its better than nothing.

To help me out, mention a software name, where it comes from & what it does, and URLs if available.
"Portable C Compiler" & TenDRA Compiler? google search did not find anything about these on irix.