http://gcc.gnu.org/bugzilla/show_bug.cgi?id=54314
--- Comment #5 from gee <jojelino at gmail dot com> 2012-08-21 13:38:57 UTC --- I think symbol _ZTCSt* need to be included in libstdc++/config/abi/pre/gnu.ver so that shared-library can export these symbols unless user did append --disable-symvers. nothing need to be done such as reverting the commit or so.