From d32e910cb2dedbe9d30651ede72fef3794103616 Mon Sep 17 00:00:00 2001
From: Bryan Drewery <bdrewery@FreeBSD.org>
Date: Tue, 12 Apr 2016 03:40:13 +0000
Subject: [PATCH] Add some more content for WITH_META_MODE.

Sponsored by:	EMC / Isilon Storage Division
---
 tools/build/options/WITH_META_MODE | 11 ++++++++++-
 1 file changed, 10 insertions(+), 1 deletion(-)

diff --git a/tools/build/options/WITH_META_MODE b/tools/build/options/WITH_META_MODE
index 6f2f296b5a4..906b557769c 100644
--- a/tools/build/options/WITH_META_MODE
+++ b/tools/build/options/WITH_META_MODE
@@ -1,3 +1,12 @@
 .\" $FreeBSD$
 Create meta files when not doing DIRDEPS_BUILD.
-The meta files can be useful for debugging.
+When the
+.Xr filemon 4
+module is loaded, dependencies will be tracked for all commands.
+If any command, its dependencies, or files it generates are missing then
+the target will be considered out-of-date and rebuilt.
+The meta files can also be useful for debugging.
+.Pp
+The build will hide commands ran unless
+.Va NO_SILENT
+is defined.