davide added a comment. I think lowering `__declspec(selectany)` to a `comdat` for GVs on ELF platform is actually reasonable. I don't know what happens on Mach-O (as far as I can tell they don't have a real notion of COMDAT, they use coalesced symbols, but I'm not an expert of the format so you might want to ask somebody who's familiar with it). I think Reid should sign-off this change anyway.
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