title: How to enable C++11 support in Eclipse?
body: <p>I know there are a lot of answers, but no one is useful.</p>
  
  <pre><code>Ubuntu 16.04
  Eclipse 4.6.2
  </code></pre>
  
  <p>I have tried every solution including:</p>
  
  <ol>
  <li>Add <code>-std=c++11 or c++14 or c++0x or gnu++0x or gnu++11</code> in the "Command to get compiler specs".</li>
  <li>Add <code>__GXX_EXPERIMENTAL_CXX0X</code> in the "Symbols".</li>
  <li>Add <code>__cplusplus</code> and set value to <code>201402L</code>.</li>
  </ol>
  
  <p>So I just wonder, why can't the developer just design an option to enable it?</p>
  
  <p>Does any one have solution?</p>
  
  <p>Oh am I forgot to rebuild? <strong>No.</strong></p>
  
  <p>To provide more information, I use a custom script to build my *.cpp. And I think build options won't affect the recognizance right? </p>
  
  <p>Sorry about missing "11".</p>