+This function is declared in different header files (namely, @code{<io.h>} or
+@code{<direct.h>}) on some platforms:
+mingw, MSVC 9.
+@item
+This function mistakenly removes a directory with
+@code{rmdir("dir/./")} on some platforms:
+Cygwin 1.5.x.
+@item
+This function fails with @code{EINVAL} instead of the expected
+@code{ENOTDIR} for @code{rmdir("file/")} on some platforms:
+mingw, MSVC 9.