title: clang_complete error: unknown argument: '--std=c++0x'
body: <p>clang++ version: 2.9
  vim version: 7.3</p>
  
  <p>I write my <code>.clang_comple</code></p>
  
  <pre><code>--std=c++0x
  </code></pre>
  
  <p>with follow source code <code>test.cc</code>:</p>
  
  <pre><code>int main () {
      return 0;
  }
  </code></pre>
  
  <p>And the clang_complete shows</p>
  
  <pre><code>test.cc|| unknown argument: '--std=c++0x'
  </code></pre>
  
  <p>in the quickfix list.</p>
  
  <p>I try to add the option with</p>
  
  <pre><code>set g:clang_user_options="--std=c++0x"
  </code></pre>
  
  <p>the problem is still there.</p>
  
  <p>Tried to trace some code of clang_complete, but still can not solve that problem. All other options can be processed correctly, but not <code>--std=c++0x</code> Do I miss anything? or made something wrong?</p>