@itemize
@item
This function is missing on some platforms:
-HP-UX 10, mingw, BeOS.
+HP-UX 10, mingw, MSVC 9, BeOS.
+@item
+On platforms where @code{off_t} is a 32-bit type, this function may not
+work correctly on files larger than 2 GB. (Cf. @code{AC_SYS_LARGEFILE}.)
+@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: