Comment # 26 on bug 1185952 from Aaron Puchert

(In reply to Reinhard Max from comment #25)
> It looks like upstream wasn't completely satisfied with it yet and hence
> hasn't commited it so far.
I was reading this as mostly stylistic concerns, but maybe I've overlooked
something.

> Or do you see an urgent need to go for llvm12 within the next weeks?
It's not urgent, we'll have to leave llvm11 in the distribution for some time.
Some packages are even on llvm{7,9,10}. But all the older LLVMs are out of
maintenance, I'm basically just fixing the occasional build failure.

Hope you don't mind that I'm assigning this back to you. It is a bug in LLVM in
my view, but without the zSystems backend maintainer agreeing to my concerns
there is nothing I can do. So we'll have to patch this out in Postgres.