missing symbols in libstdc++.so.6 built from the 4.9 branch

[Jonathan Wakely]

On 1 July 2014 09:40, Matthias Klose wrote:
>  - HPPA (build log [2]), is missing all the future_base symbols and
>    exception_ptr13exception symbols, current_exception and
>    rethrow_exception.

This implies ATOMIC_INT_LOCK_FREE <= 1 for that target. Our future and
exception_ptr implementations rely on usable atomics.

I don't know about the other missing symbols.