components. For example, the <i>X86</i> target might define a library
group for all of the <i>X86</i> components. That library group might
then be included in the <i>all-targets</i> library group.</p></li>
+
+ <li><i>installed</i> <b>[optional]</b> <b>[boolean]</b>
+ <p>Whether this library is installed. Libraries that are not installed
+ are only reported by <tt>llvm-config</tt> when it is run as part of a
+ development directory.</p></li>
</ul>
</li>