This function is missing on some platforms:
HP-UX 10, mingw, 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 does not fail when an invalid (negative) offset is passed when
large file support is enabled on some platforms:
HP-UX 11.11.
Portability problems not fixed by Gnulib:
@itemize
-@item
-On platforms where @code{off_t} is a 32-bit type, this function may not
-work correctly on files larger than 2 GB. The fix is to use the
-@code{AC_SYS_LARGEFILE} macro.
@end itemize