_plan</code> for complex and real one- and
multi-dimensional transforms, and each type had its own &lsquo;<samp>destroy</samp>&rsquo;
function.  In FFTW 3, all plans are of type <code>fftw_plan</code> and all are
destroyed by <code>fftw_destroy_plan(plan)</code>.
</p>
<p>Where you formerly used <code>fftw_create_plan</code> and <code>fftw_one</code> to
plan and compute a single 1d transform, you would now use
<code>fftw_plan_dft_1d</code> to plan the transform.  If you used the generic
<code>fftw</code> fun