[Bug libstdc++/57421] Error when linking static libstc++ due to missing future classes

[juergen.reuter at desy dot de]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=57421

--- Comment #3 from Jürgen Reuter <juergen.reuter at desy dot de> ---
I'll try to cook it down as much as possible.