Readded chapter05 Bison and Flex pages due that will be required if using HJL binutils.

git-svn-id: http://svn.linuxfromscratch.org/LFS/trunk/BOOK@7615 4aa44e1e-78dd-0310-a6d2-fbcd4c07a689

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+<?xml version="1.0" encoding="ISO-8859-1"?>
+<!DOCTYPE sect1 PUBLIC "-//OASIS//DTD DocBook XML V4.4//EN"
+  "http://www.oasis-open.org/docbook/xml/4.4/docbookx.dtd" [
+  <!ENTITY % general-entities SYSTEM "../general.ent">
+  %general-entities;
+]>
+
+<sect1 id="ch-tools-flex" role="wrap">
+  <?dbhtml filename="flex.html"?>
+
+  <title>Flex-&flex-version;</title>
+
+  <indexterm zone="ch-tools-flex">
+    <primary sortas="a-Flex">Flex</primary>
+    <secondary>tools</secondary>
+  </indexterm>
+
+  <sect2 role="package">
+    <title/>
+
+    <xi:include xmlns:xi="http://www.w3.org/2003/XInclude"
+    href="../chapter06/flex.xml"
+    xpointer="xpointer(/sect1/sect2[1]/para[1])"/>
+
+    <segmentedlist>
+      <segtitle>&buildtime;</segtitle>
+      <segtitle>&diskspace;</segtitle>
+
+      <seglistitem>
+        <seg>&flex-ch5-sbu;</seg>
+        <seg>&flex-ch5-du;</seg>
+      </seglistitem>
+    </segmentedlist>
+
+  </sect2>
+
+  <sect2 role="installation">
+    <title>Installation of Flex</title>
+
+    <para>Flex contains several known bugs. These can be fixed with the
+    following patch:</para>
+
+<screen><userinput>patch -Np1 -i ../&flex-fixes-patch;</userinput></screen>
+
+    <para>The GNU autotools will detect that the Flex source code has been
+    modified by the previous patch and tries to update the man page
+    accordingly.  This does not work on many systems, and the default page is
+    fine, so make sure it does not get regenerated:</para>
+
+<screen><userinput>touch doc/flex.1</userinput></screen>
+
+    <para>Now prepare Flex for compilation:</para>
+
+<screen><userinput>./configure --prefix=/tools</userinput></screen>
+
+    <para>Compile the package:</para>
+
+<screen><userinput>make</userinput></screen>
+
+    <para>To test the results, issue:
+    <userinput>make check</userinput>.</para>
+
+    <para>Install the package:</para>
+
+<screen><userinput>make install</userinput></screen>
+
+  </sect2>
+
+  <sect2 role="content">
+    <title/>
+
+    <para>Details on this package are located in
+    <xref linkend="contents-flex" role="."/></para>
+
+  </sect2>
+
+</sect1>