title: std::atomic support in g++ 4.4.3
body: <p>I am using g++ version 4.4.3 on Ubuntu OS. According to this matrix <a href="http://gcc.gnu.org/gcc-4.4/cxx0x_status.html" rel="noreferrer">here</a> it is supposed to support also <code>std::atomic</code>. Each time I use</p>
  
  <pre><code> #include &lt;atomic&gt;
  </code></pre>
  
  <p>the compiler gives me an error and says <code>error: atomic: No such file or directory</code>.</p>
  
  <p>Have you experienced the same problem?
  I am compiling using the following line</p>
  
  <pre><code>    g++ -std=c++0x -Wall myCode.cpp -o myApp&lt;/code&gt;
  </code></pre>