peterwaller-arm wrote:

> As the comment specifies, we really should not add new elements to *Dirs 
> arrays in Generic_GCC::GCCInstallationDetector::CollectLibDirsAndTriples.

Thanks for following up again @MaskRay. Forgive me for asking, but I didn't see 
a clear justification for "why" along side that comment. Only that it is so. I 
can imagine some justification for the rule, but where do you see the pressure 
coming from against adding it in this specific scenario? Can it be added in the 
interim until a proper fix has been identified/made?

Is anyone in a position to fix the config.guess machinery, or suggest a method 
to reliably detect the triple in LLVM's cmake? Is this merely a matter of 
adding a test for the existence of a directory in the cmake, or is something 
more complicated necessary?

https://github.com/llvm/llvm-project/pull/109263
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