[PATCH, libstdc++] Fix missing gthr-default.h issue on libstdc++ configure

[Paolo Carlini]

On 10/12/2012 04:20 PM, Pavel Chupin wrote:
> Please see attached patch (applicable after revert).
> I've moved libgcc libstdc++ common configure thread header chunk into
> separate gthr.m4.
> Could you please try it on AIX?
>
> Is it OK for trunk?
Looks Ok. If David can test is successfully on AIX I can approve it.
> Is it OK for 4.7 after a week testing in trunk?
Frankly, I'm not sure. I don't think is fixing a regression? Let's say 
at least two weeks anyway.

Thanks,
Paolo.