http://gcc.gnu.org/bugzilla/show_bug.cgi?id=53429
--- Comment #3 from Jeffrey Yasskin <jyasskin at gcc dot gnu.org> 2012-05-21 15:30:45 UTC --- Richard, I'm not asking that it be possible to link together code compiled in C++98 and C++11 mode. I'm asking that gcc be able to build in C++11 mode at all. If libstdc++.so exposed the c++98 version of complex::real(), then all C++11 programs that used complex would be potentially broken. Another way to fix this would, of course, be to either expose a configuration option to build libstdc++.so in C++11 mode or to install two different .so files in parallel, but doing that seems unnecessarily hostile to users when it would be pretty easy to guarantee that the one .so works for both versions of the language.
