<p>I think that we should leave this open until it's fixed, since it's a pretty big issue if you can't use mlpack after installation. I took a look and I think Marcus's comments are right: the <code>#include <mlpack_export.h></code> calls should all be changed to <code>#include <mlpack/mlpack_export.h></code>. But there's one more piece too:</p>
<p>In <code>src/mlpack/CMakeLists.txt</code>, there is a line that adds an include directory for mlpack_export.h (I think it's very near the top); if we change all the #includes, then this line is no longer necessary, so we should remove that too.</p>
<p><a href="https://github.com/xantares" class="user-mention">@xantares</a> may have more comments on this, since he wrote the <code>mlpack_export.h</code> code (in <a href="https://github.com/mlpack/mlpack/pull/622" class="issue-link js-issue-link" data-url="https://github.com/mlpack/mlpack/issues/622" data-id="148764057" data-error-text="Failed to load issue title" data-permission-text="Issue title is private">#622</a>).</p>
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