I would recommend using the system libstdc++ and system libgcc_s rather than one you build yourself from FSF sources, unless you're actually developing libstdc++. The FSF libstdc++ is, I believe, binary incompatible with the system one, and since system libraries use the system one there is no way to guarantee that you're using the right one for your code.
That said, though, there's something weird going on in your build that should probably be tracked down. It didn't happen to me last time I built...
