@item
@code{fflush} on an input stream right after @code{ungetc} does not discard
the @code{ungetc} buffer, on some platforms:
-MacOS X 10.3, FreeBSD 6.0, NetBSD 3.0, OpenBSD 3.8, Cygwin.
-Cygwin.
+MacOS X 10.3, FreeBSD 6.0, NetBSD 3.0, OpenBSD 3.8, Cygwin 1.5.25-10.
@end itemize
Portability problems not fixed by Gnulib: