<p>In <a href="https://github.com/mlpack/mlpack/pull/700#discussion_r69965711">CMakeLists.txt</a>:</p>
<pre style='color:#555'>&gt;  find_package(OpenMP)
&gt;  if (OPENMP_FOUND)
&gt; +  add_definitions(-DHAS_OPENMP)
&gt; +  set(HAS_OPENMP &quot;1&quot;)
</pre>
<p>I'm not sure if the CMake variable <code>HAS_OPENMP</code> is necessary; it doesn't look like it's used anywhere.  Maybe I overlooked something?</p>

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