Long-term plan for C++98/C++11 incompatibility

[Joe Buck]

On 10/10/2011 08:07 PM, Gabriel Dos Reis wrote:
> PODness has changed from C++98.

Jason Merrill wrote:

> Class layout in the ABI still uses the C++98 definition of POD.

But does this actually matter?  If I understand correctly, more classes are POD under the C++11
rules than the C++98 rules, but are there any classes that are legal C++98 that require a different
layout under the new rules?  Can anyone produce an example of a real (and not a theoretical)
binary incompatibility?