[Bug libstdc++/78870] Support std::filesystem on Windows

[redi at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=78870

Jonathan Wakely <redi at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |NEW
   Last reconfirmed|                            |2017-02-16
     Ever confirmed|0                           |1

--- Comment #9 from Jonathan Wakely <redi at gcc dot gnu.org> ---
There's a patch at https://gcc.gnu.org/ml/libstdc++/2017-02/msg00041.html

I haven't reviewed or tested it yet.