Portability problems not fixed by Gnulib:
@itemize
+@item
+stdin is created in 32-bit mode instead of 64-bit mode: Cygwin 1.5.x.
+One workaround is to use freopen(NULL, ``r'', stdin) on Cygwin 1.5.21
+or newer. Another is to use the gnulib ftello module and do
+ftello(stdin).
@end itemize