@item
This function is missing on some platforms:
HP-UX 10, mingw, BeOS.
+@item
+This function returns zero instead of positive values when large file support
+is enabled on some platforms:
+HP-UX 11.11.
+@item
+This function does not fail on pipes on some platforms:
+HP-UX 11.31.
@end itemize
Portability problems not fixed by Gnulib: