aaron.ballman added a comment.

In https://reviews.llvm.org/D33852#854176, @Prazek wrote:

> In https://reviews.llvm.org/D33852#853982, @aaron.ballman wrote:
>
> > In https://reviews.llvm.org/D33852#853410, @Prazek wrote:
> >
> > > Sorry for so late fixes, but it would be good to put it in 5.0
> >
> >
> > I do not think this should be in 5.0, as I believe we're only accepting 
> > regression fixes at this point.
>
>
> This is a regression. __declspec(selectany) works completely fine on linux 
> with 4.0. Without it clang-5.0 will be useless for any major windows project 
> compiled on linux.
>
> edit:
>  here is a regression: https://reviews.llvm.org/D32083


This is also adding new functionality that has had zero testing because it 
removes *all* target-specific checking for the attribute. Under the previous 
functionality (changed in https://reviews.llvm.org/D32083), this still required 
some mention of microsoft something (it went from requiring microsoft 
extensions to be enabled to instead require a Windows target) -- that's been 
entirely removed from this patch so now you can use this attribute for all 
target architectures, so it's not purely fixing a regression. Given how late we 
are in the release cycle, I am uncomfortable with this going in to 5.0, but I'd 
have no problems letting it bake for a bit and putting it into 5.1 (or 5.0.1, 
however we're naming bug releases these days).


https://reviews.llvm.org/D33852



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