mstorsjo wrote:
> > I think the main key word is external linkage in any case.
>
> But then wouldn't it be accepted on:
>
> ```
> struct T {
> SA static int i;
> };
> ```
>
> because that still has external linkage: https://godbolt.org/z/vafPxa4jh ?
Right, I guess. In that sense it feels like it boils down to the distinction
between declaration and definition. But for regular extern variables, we do
accept selectany on a pure declaration, and MSVC also accepts that. While
selectany shouldn't make any difference for a consumer of the declaration, it
only makes a difference for the definition.
I guess I don't know which language level nuance should be used for
distinguishing these cases then... But IMO it needs to be possible to set this
attribute on any definition of a symbol with external linkage. Setting it on a
declaration of such symbols isn't strictly needed but perhaps is accepted for
other reasons.
https://github.com/llvm/llvm-project/pull/189641
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