documentation/poky-ref-manual/ref-variables.xml: YOCTO #1104 EXTRA_IMAGE_FEATURES

Added a cross-reference to the EXTRA_IMAGE_VARIABLES glossary
term and provided more explanation describing the relationship
between the variable and the IMAGE_FEATURES variable.

(From yocto-docs rev: 0072ac854c544e218de840d923563ab53fb864d6)

Signed-off-by: Scott Rifenbark <scott.m.rifenbark@intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

1 files changed, 5 insertions, 1 deletions

diff --git a/documentation/poky-ref-manual/ref-variables.xml b/documentation/poky-ref-manual/ref-variables.xml
index 1aa00f3d84..3601c97ded 100644
--- a/documentation/poky-ref-manual/ref-variables.xml
+++ b/documentation/poky-ref-manual/ref-variables.xml
@@ -399,7 +399,11 @@
         <glossentry id='var-IMAGE_FEATURES'><glossterm>IMAGE_FEATURES</glossterm>
             <glossdef>
                 <para><link linkend="ref-features-image">List of
-                features</link> present in resulting images</para>
+                features</link> present in resulting images.
+                Typically you configure this variable in image recipes.
+                Note that you can add extra features to the image by using the
+                <link linkend='var-EXTRA_IMAGE_FEATURES'>EXTRA_IMAGE_FEATURES</link>
+                variable.</para>
             </glossdef>
         </glossentry>