title: Travis CI with Clang 3.4 and C++11
body: <p>Is it possible to get Travis CI working with Clang that is capable of C++11? (I want Clang, not GCC, I already have GCC 4.8 working in Travis CI.) It appears that the version that is there pre-installed is not C++11 capable. All my attempts at installing any newer version end up <a href="https://travis-ci.org/wilx/log4cplus/jobs/19845125" rel="nofollow noreferrer">failing because of this</a>:</p>
  
  <pre><code>In file included from /usr/lib/gcc/x86_64-linux-gnu/4.8/../../../../include/c++/4.8/bits/move.h:57:   
  /usr/lib/gcc/x86_64-linux-gnu/4.8/../../../../include/c++/4.8/type_traits:269:39: error:
  use of undeclared identifier '__float128'
  struct __is_floating_point_helper&lt;__float128&gt;
  </code></pre>
  
  <p>I have seen the <a href="https://stackoverflow.com/a/13792251/341065"><code>-D__STRICT_ANSI__</code> trick</a> but that clashes with other things for me.</p>
  
  <p>Is it possible to get it working? See also my <a href="https://github.com/wilx/log4cplus/blob/master/.travis.yml" rel="nofollow noreferrer">.travis.yml</a>.</p>