<p>Do this in a directory called <q><code class="file">pkg</code></q>, preferably (but not necessarily) in the <q><code class="file">pkg</code></q> subdirectory of your <strong class="pkg">GAP</strong> 4 installation. It creates a subdirectory called <q><code class="file">io</code></q>.</p>
<p>The package will not work without the following compilation step.</p>
<p>To compile the C part of the package do (in the <code class="file">pkg</code> directory)</p>
<pre class="normal">
cd io
./configure
make
</pre>
<p>If you installed the package in another <q><code class="file">pkg</code></q> directory than the standard <q><code class="file">pkg</code></q> directory in your <strong class="pkg">GAP</strong> 4 installation, then you have to do two things. Firstly during compilation you have to use the option <codeclass="code">--with-gaproot=PATH</code> of the <code class="file">configure</code> script where <q>PATH</q> is a path to the main <strong class="pkg">GAP</strong> root directory (if not given the default <q><code class="file">../..</code></q> is assumed).</p>
<p>Secondly you have to specify the path to the directory containing your <q><code class="file">pkg</code></q> directory to <strong class="pkg">GAP</strong>'s list of directories. This can be done by starting <strong class="pkg">GAP</strong> with the <q><code class="file">-l</code></q> command line option followed by the name of the directory and a semicolon. Then your directory is prepended to the list of directories searched. Otherwise the package is not found by <strong class="pkg">GAP</strong>. Of course, you can add this option to your <strong class="pkg">GAP</strong> startup script.</p>
<h4>2.1 <span class="Heading">Recompiling the documentation</span></h4>
<p>Recompiling the documentation is possible by the command <q><code class="file">gap makedoc.g</code></q> in the <code class="file">io</code> directory. But this should not be necessary.</p>
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