===================================================================
RCS file: /cvs/mandoc/mandoc.1,v
retrieving revision 1.209
retrieving revision 1.210
diff -u -p -r1.209 -r1.210
--- mandoc/mandoc.1	2017/06/29 15:22:17	1.209
+++ mandoc/mandoc.1	2017/07/01 09:47:30	1.210
@@ -1,4 +1,4 @@
-.\"	$Id: mandoc.1,v 1.209 2017/06/29 15:22:17 schwarze Exp $
+.\"	$Id: mandoc.1,v 1.210 2017/07/01 09:47:30 schwarze Exp $
 .\"
 .\" Copyright (c) 2009, 2010, 2011 Kristaps Dzonsons <kristaps@bsd.lv>
 .\" Copyright (c) 2012, 2014-2017 Ingo Schwarze <schwarze@openbsd.org>
@@ -15,7 +15,7 @@
 .\" ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
 .\" OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
 .\"
-.Dd $Mdocdate: June 29 2017 $
+.Dd $Mdocdate: July 1 2017 $
 .Dt MANDOC 1
 .Os
 .Sh NAME
@@ -836,6 +836,14 @@ generated by CVS
 or
 .Ic NetBSD
 keyword substitution as conventionally used in these operating systems.
+.It Sy "referenced manual not found"
+.Pq mdoc
+An
+.Ic \&Xr
+macro references a manual page that is not found in the base system.
+The path to look for base system manuals is configurable at compile
+time and defaults to
+.Pa /usr/share/man : /usr/X11R6/man .
 .El
 .Ss Style suggestions
 .Bl -ohang