[Bug libstdc++/59472] Many warnings "type of 'X' does not match original declaration" when linking with libstdc++ static library compiled with -flto

[redi at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=59472

--- Comment #4 from Jonathan Wakely <redi at gcc dot gnu.org> ---
That should work for the streambufs, it's not so simple for the standard stream
objects though, as they're user-visible and we declared their (pretend) types
in <iostream>.