From 9dc5d76e101ecd7e0f57ed9f80b80084a8d631dc Mon Sep 17 00:00:00 2001
From: Ed Maste <emaste@FreeBSD.org>
Date: Wed, 19 Apr 2017 18:11:08 +0000
Subject: [PATCH] makeman: add a comment describing purpose and invocation

Reviewed by:	jhb, ngie
MFC after:	2 weeks
Sponsored by:	The FreeBSD Foundation
Differential Revision:	https://reviews.freebsd.org/D10389
---
 tools/build/options/makeman | 18 ++++++++++++++++--
 1 file changed, 16 insertions(+), 2 deletions(-)

diff --git a/tools/build/options/makeman b/tools/build/options/makeman
index bf4474a501e..1e89a4cbbe0 100755
--- a/tools/build/options/makeman
+++ b/tools/build/options/makeman
@@ -1,8 +1,22 @@
 #!/bin/sh
 #
 # This file is in the public domain.
-#
 # $FreeBSD$
+#
+# This script is used to create the src.conf.5 man page, using template text
+# contained herein and the contents of the WITH_* and WITHOUT_* files in the
+# same directory. Each WITH_* and WITHOUT_* file documents the effect of the
+# /etc/src.conf knob with the same name.
+#
+# This script invokes "make showconfig" for each supported architecture in
+# order to determine, for each option, whether the default setting is always
+# WITH, always WITHOUT, or is architecture-dependent. It also determines
+# and describes dependencies between options.
+#
+# Usage:
+#
+#     cd tools/build/options
+#     sh makeman > ../../../share/man/man5/src.conf.5
 
 set -o errexit
 export LC_ALL=C
@@ -128,7 +142,7 @@ main()
 
 	fbsdid='$'FreeBSD'$'
 	cat <<EOF
-.\" DO NOT EDIT-- this file is automatically generated.
+.\" DO NOT EDIT-- this file is generated by tools/build/options/makeman.
 .\" ${fbsdid}
 .Dd $(echo $(LC_TIME=C date +'%B %e, %Y'))
 .Dt SRC.CONF 5