title: llvm clang 2.6: "not using the clang compiler for C++ inputs "
body: <p>LLVM 2.6 + clang.</p>
  
  <p>Trying to compile C++ file and got:</p>
  
  <pre><code>clang: warning: not using the clang compiler for C++ inputs
  </code></pre>
  
  <p>How can I start clang in C++ mode?</p>