ODR violation for std::cout etc.

[Benjamin Kosnik]

> The "current" situation was "the best" compromise we arrived at in the
> very old days of GCC-3.x.x -- see the archive for discussions.

Indeed. I would resist change just for change's sake, especially when
we have not seen a detailed bug report filed.

> I'd suspect that nowadays we have better ways of handling the
>issues -- though I've not done any new investigation.

I've been waiting to revisit this issue until we have correct
alignment support for template objects (std::aligned_storage, etc.)
in g++. Then, we can use array_allocator to deal with this stuff in a
much more transparent and C++ friendly way.

-benjamin