1 files changed, 41 insertions, 0 deletions

diff --git a/documentation/ref-manual/ref-variables.xml b/documentation/ref-manual/ref-variables.xml
index 030c422c57..6fd953df6c 100644
--- a/documentation/ref-manual/ref-variables.xml
+++ b/documentation/ref-manual/ref-variables.xml
@@ -896,6 +896,47 @@
             </glossdef>
         </glossentry>
 
+        <glossentry id='var-BUILDHISTORY_FEATURES'><glossterm>BUILDHISTORY_FEATURES</glossterm>
+            <glossdef>
+                <para>
+                    When inheriting the
+                    <link linkend='ref-classes-buildhistory'><filename>buildhistory</filename></link>
+                    class, specifies the build history features the
+                    OpenEmbedded build system uses.
+                    For more information on how build history works, see the
+                    "<link linkend='maintaining-build-output-quality'>Maintaining Build Output Quality</link>"
+                    section.
+                </para>
+
+                <para>
+                    You can specify three features in the form of a
+                    space-separated list:
+                    <itemizedlist>
+                        <listitem><para><emphasis>image:</emphasis>
+                            Analysis of the contents of images, which
+                            includes the list of installed packages among other
+                            things.
+                            </para></listitem>
+                        <listitem><para><emphasis>package:</emphasis>
+                            Analysis of the contents of individual packages.
+                            </para></listitem>
+                        <listitem><para><emphasis>sdk:</emphasis>
+                            Analysis of the contents of the software
+                            development kit (SDK).
+                            </para></listitem>
+                    </itemizedlist>
+                </para>
+
+                <para>
+                    By default, the <filename>buildhistory</filename> class
+                    enables all three features:
+                    <literallayout class='monospaced'>
+     BUILDHISTORY_FEATURES ?= "image package sdk"
+                    </literallayout>
+                </para>
+            </glossdef>
+        </glossentry>
+
         <glossentry id='var-BUILDSTATS_BASE'><glossterm>BUILDSTATS_BASE</glossterm>
             <glossdef>
                 <para>