[Bug libstdc++/50703] std::stringstream not thread-safe

[redi at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=50703

--- Comment #4 from Jonathan Wakely <redi at gcc dot gnu.org> 2011-10-13 
08:11:42 UTC ---
You cannot use libstdc++ separately from the GCC version it ships with, so to
use libstdc++ 4.6.1 you must use G++ 4.6.1