necessary support for C99 (e.g., header files) cannot be found.
   </p><p>As of GCC 3.0, C99 support includes classification functions
      such as <code class="code">isnormal</code>, <code class="code">isgreater</code>,
      <code class="code">isnan</code>, etc.
      The functions used for 'long long' support such as <code class="code">strtoll</code>
      are supported, as is the <code class="code">lldiv_t</code> typedef.  Also supported
      are the wide character functions using 'long long', like
  