Hi Lourens,
I think this explains... http://216.239.57.104/search?q=cache:vN6DoeIPqA0J:www.mail-archive.com/gcc-bugs%40gcc.gnu.org/msg33232.html+_GLIBCPP_USE_WCHAR_T+Cygwin&hl=en
Bottom line: underlying Win32 API either doesn't support the functionality, or supports it in an incompatible way that would be non-trivial to create an adapter layer.
HTH, --Eljay
