g, such as <code class="docutils literal notranslate"><span class="pre">-std=gnu++11</span></code>, the flag will be added
automatically.</p>
<p>The <code class="docutils literal notranslate"><span class="pre">INTERFACE</span></code>, <code class="docutils literal notranslate"><span class="pre">PUBLIC</span></code> and <code class="docutils literal notranslate"><span class="pre">PRIVATE</span></code> keywords are required to
specify the scope of the features.  <code class="docutils literal notranslate"><spa