 directory in the
    GCC sources contains the files needed to create the GNU C++ Library.
  </p><p>
It has subdirectories:
</p><div class="variablelist"><dl class="variablelist"><dt><span class="term"><code class="filename">doc</code></span></dt><dd>
    Files in HTML and text format that document usage, quirks of the
    implementation, and contributor checklists.
    </dd><dt><span class="term"><code class="filename">include</code></span></dt><dd>
    All header files for the C++ library are within this 