[Bug libstdc++/52765] -std=c++0x requires multilib for non-optimized libstdc++

[redi at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=52765

--- Comment #2 from Jonathan Wakely <redi at gcc dot gnu.org> 2012-03-29 10:08:20 UTC ---
(In reply to comment #0)
> I am not sure this is really a bug (is building libstdc++ at -O0 supported?),

Yes, the --enable-libstdcxx-debug configure option builds an alternative
libstdc++.so with -O0 (but I can't reproduce this when using that lib)