libstdc++ c++98 & c++11 ABI incompatibility

[Jeff Law]

On 07/02/2012 10:26 AM, Michael Meeks wrote:
>
> On Thu, 2012-06-14 at 15:14 +0200, Matthias Klose wrote:
>> While PR53646 claims that c++98 and c++11 should be ABI
>> compatible (modulo bugs), the addition of the _M_size member
>> to std::_List_base::_List_impl makes libraries using
>> std::list in headers incompatible
>
> 	This is pretty nasty for LibreOffice (and no doubt others). We can, and
> often do depend on rather a number of system C++ libraries and at a very
> minimum, having no simple way to detect which C++ ABI we have to build
> against 'old' vs. 'new' - is profoundly unpleasant.
>
> 	Is there no chance of having a bug fix that is a revision of the
> (unintended?) ABI breakage in this compiler series ?
That's the direction I'd prefer to see (reversion until we're ready to 
make the wholesale ABI changes).  Not sure what the libstdc++ 
maintainers are thinking right now.

Jeff