</para>
</formalpara>
-<formalpara id="G_DEBUG">
+<formalpara id="G-DEBUG:CAPS">
<title><envar>G_DEBUG</envar></title>
<para>
If GLib has been configured with <option>--enable-debug=yes</option>,
</para>
</formalpara>
+<formalpara id="TZDIR">
+ <title><envar>TZDIR</envar></title>
+
+ <para>
+ Allows to specify a nonstandard location for the timezone data files
+ that are used by the #GDateTime API. The default location is under
+ <filename>/usr/share/zoneinfo</filename>. For more information,
+ also look at the <command>tzset</command> manual page.
+ </para>
+</formalpara>
+
</refsect2>
<refsect2 id="setlocale">
</refsect2>
<refsect2>
+<title>SystemTap</title>
+
+<para>
+<ulink url="http://sourceware.org/systemtap/">SystemTap</ulink> is a dynamic whole-system
+analysis toolkit. GLib ships with a file <filename>glib.stp</filename> which defines a
+set of probe points, which you can hook into with custom SystemTap scripts.
+See the files <filename>glib.stp</filename> and <filename>gobject.stp</filename> which
+are in your shared SystemTap scripts directory.
+</para>
+
+</refsect2>
+
+<refsect2>
<title>Memory statistics</title>
<para>