class="docutils literal notranslate"><span class="pre">&lt;dirs&gt;</span></code>
directories' scopes.  CMake must already know about each of these
source directories, either by having added them through a call to
<span class="target" id="index-0-command:add_subdirectory"></span><a class="reference internal" href="add_subdirectory.html#command:add_subdirectory" title="add_subdirectory"><code class="xref cmake cmake-command docutils literal notranslate"><span class="pre">add_subdirectory()</span></code></a> 