 must also link to <em>both</em> the FFTW MPI library and to the
serial FFTW library.  On Unix, this means adding <code>-lfftw3_mpi
-lfftw3 -lm</code> at the end of the link command.
</p>
<a name="index-precision-6"></a>
<p>Different precisions are handled as in the serial interface:
See <a href="Precision.html#Precision">Precision</a>.  That is, &lsquo;<samp>fftw_</samp>&rsquo; functions become
<code>fftwf_</code> (in single precision) etcetera, and the libraries become
<code>-lfftw3f_mpi -lfftw3f -lm</cod