class="xref cmake cmake-command docutils literal notranslate"><span class="pre">try_compile()</span></code></a> command forwards flags from variables
like <span class="target" id="index-0-variable:CMAKE_&lt;LANG&gt;_FLAGS"></span><a class="reference internal" href="../variable/CMAKE_LANG_FLAGS.html#variable:CMAKE_&lt;LANG&gt;_FLAGS" title="CMAKE_&lt;LANG&gt;_FLAGS"><code class="xref cmake cmake-variable docutils literal notranslate"><span class="pre">CMAKE_CXX_FLAGS</span></code></a>, unknown flags
in such 