Index: en_US.ISO8859-1/books/porters-handbook/uses/chapter.xml
===================================================================
--- en_US.ISO8859-1/books/porters-handbook/uses/chapter.xml
+++ en_US.ISO8859-1/books/porters-handbook/uses/chapter.xml
@@ -689,6 +689,43 @@
       build- and run-time dependencies.</para>
   </sect1>
 
+  <sect1 xml:id="uses-gl">
+    <title><literal>gl</literal></title>
+
+    <para>Possible arguments: (none)</para>
+
+    <para>Provides an easy way to depend on
+      <application>GL</application> components.  The components
+      should be listed in <varname>USE_GL</varname>.  The available
+      components are:</para>
+
+    <itemizedlist>
+      <listitem>
+	<para><literal>egl</literal></para>
+      </listitem>
+
+      <listitem>
+	<para><literal>gl</literal></para>
+      </listitem>
+
+      <listitem>
+	<para><literal>glesv2</literal></para>
+      </listitem>
+
+      <listitem>
+	<para><literal>glu</literal></para>
+      </listitem>
+
+      <listitem>
+	<para><literal>glut</literal></para>
+      </listitem>
+
+      <listitem>
+	<para><literal>glw</literal></para>
+      </listitem>
+    </itemizedlist>
+  </sect1>
+
   <sect1 xml:id="uses-gmake">
     <title><literal>gmake</literal></title>