extern int acl_entries (acl_t);
# endif
+# if HAVE_ACL_TYPE_EXTENDED /* MacOS X */
+/* ACL is an ACL, from a file, stored as type ACL_TYPE_EXTENDED.
+ Return 1 if the given ACL is non-trivial.
+ Return 0 if it is trivial. */
+extern int acl_extended_nontrivial (acl_t);
+# else
+/* ACL is an ACL, from a file, stored as type ACL_TYPE_ACCESS.
+ Return 1 if the given ACL is non-trivial.
+ Return 0 if it is trivial, i.e. equivalent to a simple stat() mode.
+ Return -1 and set errno upon failure to determine it. */
+extern int acl_access_nontrivial (acl_t);
+# endif
+
# endif
#endif