[v3 patch] Add std::tr1::shared_ptr

[Benjamin Kosnik]

> It'd be possible to get rid of that. I think easiest would be to run it
> and expect it to fail at runtime (since it would throw with exceptions
> enabled or abort() without).  Does that sound OK?

Sounds great.

> > All you need to do is make sure -fno-exceptions compiles cleanly. (It
> > looks like you've tested this. Am I correct?)
> 
> I did test it, but a while ago. I'll check again.

Thanks.

-benjamin