MPILE_FEATURES</span></code></a>, or <span class="target" id="index-0-variable:CMAKE_CXX_COMPILE_FEATURES"></span><a class="reference internal" href="../variable/CMAKE_CXX_COMPILE_FEATURES.html#variable:CMAKE_CXX_COMPILE_FEATURES" title="CMAKE_CXX_COMPILE_FEATURES"><code class="xref cmake cmake-variable docutils literal notranslate"><span class="pre">CMAKE_CXX_COMPILE_FEATURES</span></code></a>
variables, then an error will be reported by CMake.  If the use of the feature requires
an additional compiler fla