@item
When the argument ends in a slash, the function call fails on some platforms.
@item
+This function mistakenly succeeds on @samp{mkdir("d/./",mode)} on
+some platforms:
+Cygwin 1.5.x, mingw.
+@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
like this: