1 files changed, 62 insertions, 5 deletions
diff --git a/chapter05/tcl.xml b/chapter05/tcl.xml
index 7f15832c2..69dcbdec3 100644
--- a/chapter05/tcl.xml
+++ b/chapter05/tcl.xml
@@ -3,13 +3,14 @@
   <!ENTITY % general-entities SYSTEM "../general.ent">
   %general-entities;
 ]>
-<sect1 id="ch-tools-tcl" xreflabel="Tcl" role="wrap">
+<sect1 id="ch-tools-tcl" role="wrap">
 <title>Tcl-&tcl-version;</title>
 <?dbhtml filename="tcl.html"?>
 
 <indexterm zone="ch-tools-tcl"><primary sortas="a-Tcl">Tcl</primary></indexterm>
 
 <sect2 role="package"><title/>
+<para>The Tcl package contains the Tool Command Language.</para>
 
 <segmentedlist>
 <segtitle>&buildtime;</segtitle>
@@ -17,11 +18,26 @@
 <seglistitem><seg>0.9 SBU</seg><seg>23 MB</seg></seglistitem>
 </segmentedlist>
 
+<segmentedlist>
+<segtitle>Tcl installation depends on</segtitle>
+<seglistitem><seg>Bash, Binutils, Coreutils, Diffutils,
+GCC, Glibc, Grep, Make, and Sed</seg></seglistitem>
+</segmentedlist>
+
 </sect2>
 
 <sect2 role="installation">
 <title>Installation of Tcl</title>
 
+<para>This package and the next two (Expect and DejaGNU) are
+installed to support running the test suites for GCC and Binutils.
+Installing three packages for testing purposes may seem excessive, but
+it is very reassuring, if not essential, to know that the most
+important tools are working properly. Even if the test suites are not
+run in this chapter (they are not mandatory), these packages
+are required to run the test suites in <xref
+linkend="chapter-building-system"/>.</para>
+
 <para>Prepare Tcl for compilation:</para>
 
 <screen><userinput>cd unix
@@ -31,14 +47,22 @@
 
 <screen><userinput>make</userinput></screen>
 
-<para>To test the results,  issue:
-<userinput>TZ=UTC make test</userinput>.</para>
+<para>To test the results, issue: <userinput>TZ=UTC make
+test</userinput>. The Tcl test suite is known to experience failures
+under certain host conditions that are not fully understood.
+Therefore, test suite failures here are not surprising, and are not
+considered critical. The <parameter>TZ=UTC</parameter> parameter sets
+the time zone to Coordinated Universal Time (UTC), also known as
+Greenwich Mean Time (GMT), but only for the duration of the test suite
+run. This ensures that the clock tests are exercised correctly.
+Details on the <envar>TZ</envar> environment variable is provided in
+<xref linkend="chapter-bootscripts"/>.</para>
 
 <para>Install the package:</para>
 
 <screen><userinput>make install</userinput></screen>
 
-<warning><para><emphasis>Do not remove</emphasis> the
+<warning><para><emphasis>Do not</emphasis> remove the
 <filename class="directory">tcl&tcl-version;</filename> source directory yet, as the next package
 will need its internal headers.</para></warning>
 
@@ -50,8 +74,41 @@ will need its internal headers.</para></warning>
 
 <sect2 id="contents-tcl" role="content"><title>Contents of Tcl</title>
 
-<para>See testing</para>
+<segmentedlist>
+<segtitle>Installed programs</segtitle>
+<segtitle>Installed library</segtitle>
+<seglistitem><seg>tclsh (link to tclsh8.4) and tclsh8.4</seg><seg>libtcl8.4.so</seg></seglistitem>
+</segmentedlist>
+
+<variablelist><bridgehead renderas="sect3">Short Descriptions</bridgehead>
+<?dbfo list-presentation="list"?>
+
+<varlistentry id="tclsh8.4">
+<term><command>tclsh8.4</command></term>
+<listitem>
+<para>The Tcl command shell</para>
+<indexterm zone="ch-tools-tcl tclsh8.4"><primary sortas="b-tclsh8.4">tclsh8.4</primary></indexterm>
+</listitem>
+</varlistentry>
+
+<varlistentry id="tclsh">
+<term><command>tclsh</command></term>
+<listitem>
+<para>A link to tclsh8.4</para>
+<indexterm zone="ch-tools-tcl tclsh"><primary sortas="b-tclsh">tclsh</primary></indexterm>
+</listitem>
+</varlistentry>
+
+<varlistentry id="libtcl8.4.so">
+<term><filename class="libraryfile">libtcl8.4.so</filename></term>
+<listitem>
+<para>The Tcl library</para>
+<indexterm zone="ch-tools-tcl libtcl8.4.so"><primary sortas="c-libtcl8.4.so">libtcl8.4.so</primary></indexterm>
+</listitem>
+</varlistentry>
+</variablelist>
 
 </sect2>
 
 </sect1>
+