Portability problems fixed by Gnulib:
@itemize
@item
-On some old platforms, @code{utime (file, NULL)} fails to set the file's
-timestamp to the current time.
+On some old platforms (Sequent), @code{utime (file, NULL)} fails to set the
+file's timestamp to the current time.
@end itemize
Portability problems not fixed by Gnulib: