title: fatal error: mpi.h: No such file or directory #include <mpi.h>
body: <p>when I compile my script with only</p>
  
  <pre><code>#include &lt;mpi.h&gt;
  </code></pre>
  
  <p>it tells me that there is no such file or directory.
  But when i include the path to mpi.h as</p>
  
  <pre><code>#include "/usr/include/mpi/mpi.h"
  </code></pre>
  
  <p>(the path is correct) it returns:</p>
  
  <pre><code>In file included from /usr/include/mpi/mpi.h:2087:0,
                   from lbm.cc:7:
  /usr/include/mpi/openmpi/ompi/mpi/cxx/mpicxx.h:35:17: fatal error: mpi.h: No such file or directory
   #include "mpi.h"
                   ^
  compilation terminated.
  </code></pre>
  
  <p>Anyone know how to fix this?</p>