<p>In <a href="https://github.com/mlpack/mlpack/pull/523#discussion_r59445167">src/mlpack/core/util/split_data.hpp</a>:</p>
<pre style='color:#555'>&gt; +  /**
&gt; +   * @brief TrainTestSplit
&gt; +   * @param testRatio the ratio of test data
&gt; +   * @param seed seed of the random device
&gt; +   * @warning slice should not less than 1
&gt; +   */
&gt; +  TrainTestSplit(double testRatio,                
&gt; +                 arma::arma_rng::seed_type seed = 0) :
&gt; +    seed(seed),    
&gt; +    testRatio(testRatio)
&gt; +  {    
&gt; +  }
&gt; +
&gt; +  /**
&gt; +   *Split training data and test data, please define
&gt; +   *ARMA_USE_CXX11 to enable move of c++11
</pre>
<p>mlpack requires C++11 so I think we can assume that <code>ARMA_USE_CXX11</code> is enabled without any issues.</p>

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