before.
   </p></div><div class="section"><div class="titlepage"><div><div><h3 class="title"><a id="numerics.c.c99"></a>C99</h3></div></div></div><p>In addition to the other topics on this page, we'll note here some
      of the C99 features that appear in libstdc++.
   </p><p>The C99 features depend on the <code class="code">--enable-c99</code> configure flag.
      This flag is already on by default, but it can be disabled by the
      user.  Also, the configuration machinery will disable it if the
      