[swift-dev] swift (ABI) and Windows

John McCall rjmccall at apple.com
Wed Apr 6 13:32:52 CDT 2016

> On Apr 6, 2016, at 11:18 AM, Jordan Rose via swift-dev <swift-dev at swift.org> wrote:
> Hey, Saleem. How do you expect this to differ from normal symbol visibility? It seems to me that in a shared library, any public symbol is either exported or imported, depending on whether it has a definition, and any non-public symbol is default. (Unlike C, we expect to have sensible rules here.) I guess there's the difference between "a public symbol from elsewhere in this library" and "a public symbol from some other library". Is that it?

In concept, it's more-or-less the same as symbol visibility.  My understanding is that the PE/COFF model is simply a little less forgiving about getting it wrong.

As you say, this is something we want to be getting right anyway because it allows IRGen to use more efficient code patterns.


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