+The declaration of this function lacks @code{const} in the second argument
+on some platforms:
+OSF/1 5.1.
+@item
+On some platforms, this function mis-handles trailing slash:
+FreeBSD 7.2, Solaris 9.
+@item
+This function cannot set full timestamp resolution. In particular,
+some platforms incorrectly round rather than truncate. Use
+@code{utimensat(AT_FDCWD,file,times,0)}, or the gnulib module utimens,