https://gcc.gnu.org/bugzilla/show_bug.cgi?id=99333
--- Comment #3 from Jonathan Wakely <redi at gcc dot gnu.org> --- (In reply to Moritz Bunkus from comment #2) > while Boost recognizes both. That's what I wanted to know, thanks. > Note that __CYGWIN__ is not defined with the compiler from MXE! Obviously, because it's not cygwin. Which is why //x paths are not treated as a root-name. As I said, that's by design, but can be changed.
