class="outline-2">
<h2 id="sec-2"><span class="section-number-2">2</span> The code</h2>
<div class="outline-text-2" id="text-2">
<p>
The general structure is
</p>
<div class="org-src-container">

<pre class="src src-f90"><span style="color: #a020f0;">module</span> <span style="color: #0000ff;">m_redist_spmatrix</span>
<span style="color: #483d8b;">#ifdef</span> SIESTA__PEXSI
 <span style="color: #a020f0;">implicit</span> <span style="color: #228b22;">none</span>
 &lt;&lt;module-type-declarations&gt;&gt;
 <s