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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>PKG_ADD</code><!-- /@w --> or <code>PKG_DEL</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>PKG_ADD</code><!-- /@w --> or <code>PKG_DEL</code><!-- /@w --> directive they will be
added to either the <code>PKG_ADD</code><!-- /@w --> or <code>PKG_DEL</code><!-- /@w --> files.
<p>In <code>m</code>-files a <code>PKG_ADD</code><!-- /@w --> directive looks like this
<pre class="example"> ## PKG_ADD: some_octave_command
</pre>
<p class="noindent">Such lines should be added before the <code>function</code> keyword.
In C++ files a <code>PKG_ADD</code><!-- /@w --> directive looks like this
<pre class="example"> // PKG_ADD: some_octave_command
</pre>
<p class="noindent">In both cases <code>some_octave_command</code> should be replaced by the
command that should be placed in the <code>PKG_ADD</code><!-- /@w --> file.
<code>PKG_DEL</code><!-- /@w --> directives work in the same way, except the <code>PKG_ADD</code><!-- /@w -->
keyword is replaced with <code>PKG_DEL</code><!-- /@w --> and the commands get added
to the <code>PKG_DEL</code><!-- /@w --> file.
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