@item
This function mistakenly succeeds on @samp{mkdir("d/./",mode)} on
some platforms:
-Cygwin 1.5.x, mingw.
+Cygwin 1.5.x, mingw, MSVC 9.
@item
On Windows platforms (excluding Cygwin), this function is called @code{_mkdir}
and takes only one argument. The fix (without Gnulib) is to define a macro