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<h4 class="subsection">37.4.3 PKG_ADD and PKG_DEL Directives</h4>

<p>If the package contains files called <code><span class="nolinebreak">PKG_ADD</span></code><!-- /@w --> or <code><span class="nolinebreak">PKG_DEL</span></code><!-- /@w -->
the commands in these files will be executed when the package is
added or removed from the users path.  In some situations such files
are a bit cumbersome to maintain, so the package manager supports
automatic creation of such files.  If a source file in the package
contains a <code><span class="nolinebreak">PKG_ADD</span></code><!-- /@w --> or <code><span class="nolinebreak">PKG_DEL</span></code><!-- /@w --> directive they will be
added to either the <code><span class="nolinebreak">PKG_ADD</span></code><!-- /@w --> or <code><span class="nolinebreak">PKG_DEL</span></code><!-- /@w --> files.
</p>
<p>In <code>m</code>-files a <code><span class="nolinebreak">PKG_ADD</span></code><!-- /@w --> directive looks like this
</p>
<div class="example">
<pre class="example">## PKG_ADD: some_octave_command
</pre></div>

<p>Such lines should be added before the <code>function</code> keyword.
In C++ files a <code><span class="nolinebreak">PKG_ADD</span></code><!-- /@w --> directive looks like this
</p>
<div class="example">
<pre class="example">// PKG_ADD: some_octave_command
</pre></div>

<p>In both cases <code>some_octave_command</code> should be replaced by the
command that should be placed in the <code><span class="nolinebreak">PKG_ADD</span></code><!-- /@w --> file.
<code><span class="nolinebreak">PKG_DEL</span></code><!-- /@w --> directives work in the same way, except the
<code><span class="nolinebreak">PKG_ADD</span></code><!-- /@w --> keyword is replaced with <code><span class="nolinebreak">PKG_DEL</span></code><!-- /@w --> and the commands
get added to the <code><span class="nolinebreak">PKG_DEL</span></code><!-- /@w --> file.
</p>



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