[yocto] why is VOLATILE_LOG_DIR mentioned in ref manual when it doesn't exist?

[Robert P. J. Day]

  not sure if i'm misreading this, but i note that an addition was
made to the ref manual back in dec 2016:

commit 5d2bdf49e569e44d02602501d72418f04dbe6e4a
Author: Scott Rifenbark <srifenbark at gmail.com>
Date:   Fri Dec 30 10:20:28 2016 -0800

    ref-manual: New VOLATILE_LOG_DIR variable description

    Fixes [YOCTO #6132]

    No mention of how to make the target directory /var/log
    persistent.  I added a note to the "post-install-logging"
    image feature that points to the new VOLATILE_LOG_DIR
    variable description, which I added to the glossary.

    Signed-off-by: Scott Rifenbark <srifenbark at gmail.com>

diff --git a/documentation/ref-manual/ref-features.xml
b/documentation/ref-manual/ref-features.xml
index 282a517..a4516a2 100644
--- a/documentation/ref-manual/ref-features.xml
+++ b/documentation/ref-manual/ref-features.xml
@@ -297,6 +297,12 @@
                     Enables logging postinstall script runs to
                     the <filename>/var/log/postinstall.log</filename> file
                     on first boot of the image on the target system.
+                    <note>
+                        To make the <filename>/var/log</filename> directory
+                        on the target persistent, use the
+                        <ulink url='&YOCTO_DOCS_REF_URL;#var-VOLATILE_LOG_DIR'><filename>VOLATILE_LOG_DIR</filename></ulink>
+                        variable by setting it to "no".
+                    </note>
                     </para></listitem>
                 <listitem><para><emphasis>ptest-pkgs:</emphasis>
                     Installs ptest packages for all ptest-enabled recipes.


but that is a broken link, and i see no definition or usage of that
variable. can someone clarify what is happening here?

rday

-- 

========================================================================
Robert P. J. Day                                 Ottawa, Ontario, CANADA
                        http://crashcourse.ca

Twitter:                                       http://twitter.com/rpjday
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