[Bug libstdc++/53673] Add magic weak symbol to indicate C++ standard setting (C++03, C++11 etc) to help debug ABI problems

[redi at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=53673

--- Comment #11 from Jonathan Wakely <redi at gcc dot gnu.org> 2012-06-18 
14:22:05 UTC ---
Please don't just use this PR for "me too" comments about interoperability