Docs: Add Jack to navigation, link from note in Building the System
Bug: 22639850
Change-Id: Id7b2be93b510e725ab745e202e99e8bdfedadd0b
diff --git a/src/source/building.jd b/src/source/building.jd
index ecb52db..fbfb427 100644
--- a/src/source/building.jd
+++ b/src/source/building.jd
@@ -28,6 +28,10 @@
branches, including <code>master</code>. The basic sequence of build commands
is as follows:</p>
+<p class="note"><strong>Note:</strong> If you're building Android 6.0 or later,
+please see <a href="jack.html">Compiling with Jack</a> for information on this
+new default toolchain.</p>
+
<h2 id="initialize">Set up environment</h2>
<p>Initialize the environment with the <code>envsetup.sh</code> script. Note
that replacing <code>source</code> with <code>.</code> (a single dot) saves a few characters,