Any application shutdown hooks?

[Andrej Mitrovic]

On 5/25/11, Steven Schveighoffer <schveiguy at yahoo.com> wrote:
> If you want a static dtor that runs on every thread shutdown, use a normal
> static dtor.  If you want one that runs on the entire application
> shutdown, use a shared static dtor.

I saw some commits change a static dtor to a shared static dtor and
wondered what was that all about..