@itemize
@item
This function is missing on some platforms:
-mingw.
+mingw, MSVC 9.
@end itemize
Portability problems not fixed by Gnulib:
@itemize
+@item
+This function crashes rather than failing with @code{EMFILE} if no
+resources are left on some platforms:
+Cygwin 1.7.9.
@end itemize