dex">Index</a>]</p>
</div>
<hr>
<a name="MPI-Initialization-1"></a>
<h4 class="subsection">6.12.2 MPI Initialization</h4>

<p>Before calling any other FFTW MPI (&lsquo;<samp>fftw_mpi_</samp>&rsquo;) function, and
before importing any wisdom for MPI problems, you must call:
</p>
<a name="index-fftw_005fmpi_005finit-4"></a>
<div class="example">
<pre class="example">void fftw_mpi_init(void);
</pre></div>

<a name="index-fftw_005finit_005fthreads-3"></a>
<p>If FFTW threads support is used, however, <code>fftw_