[Bug libstdc++/54314] [4.8 Regression] undefined references to 'construction vtable for std::ostream-in-std::basic_ostringstream<char, std::char_traits<char>, std::allocator<char> >'

[jason at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=54314

--- Comment #36 from Jason Merrill <jason at gcc dot gnu.org> 2013-03-12 13:05:52 UTC ---
(In reply to comment #35)
> I am still bit confused how keyed construction vtables are supposed to work. 
> If I understand it right, and there is no C++ ABI mangling for those, I think
> it makes no sense to export them from the unit they are keyed to, since the
> other units can not refer them anyway.

Right.

> So perhaps the construction vtables should be always comdat hidden?

Hmm?  My earlier patch made them hidden, and they were already comdat.  Do you
mean something else?