Index: head/tools/build/options/WITH_META_MODE
===================================================================
--- head/tools/build/options/WITH_META_MODE	(revision 300629)
+++ head/tools/build/options/WITH_META_MODE	(revision 300630)
@@ -1,41 +1,43 @@
 .\" $FreeBSD$
 Creates
 .Xr make 1
 meta files when building, which can provide a reliable incremental build when
 using
 .Xr filemon 4 .
 The meta file is created in the OBJDIR as
 .Pa target.meta .
 These meta files track the command ran, its output, and the current directory.
 When the
 .Xr filemon 4
 module is loaded, any files used by the commands executed will be tracked as
 dependencies for the target in its meta file.
 The target will be considered out-of-date and rebuilt if any of the following
 are true compared to the last build:
 .Bl -bullet -compact
 .It
 The command to execute changes.
 .It
 The current working directory changes.
 .It
-The target's meta file is missing.
+The target's meta file is missing, if it had
+.Sy .META
+as a dependency.
 .It
 [requires
 .Xr filemon 4 ]
 Files read, executed or linked to are newer than the target.
 .It
 [requires
 .Xr filemon 4 ]
 Files read, written, executed or linked are missing.
 .El
 The meta files can also be useful for debugging.
 .Pp
 The build will hide commands ran unless
 .Va NO_SILENT
 is defined.
 .Pp
 The build operates as it normally would otherwise.
 This option originally invoked a different build system but that was renamed
 to
 .Va WITH_DIRDEPS_BUILD .