source: clfs-sysroot/BOOK/final-system/common/flex.xml @ 586feb7

Last change on this file since 586feb7 was 586feb7, checked in by Joe Ciccone <jciccone@…>, 16 years ago

Updated the bootscripts package and make LFS to CLFS updates.

  • Property mode set to 100644
File size: 3.9 KB
Line 
1<?xml version="1.0" encoding="ISO-8859-1"?>
2<!DOCTYPE sect1 PUBLIC "-//OASIS//DTD DocBook XML V4.4//EN"
3  "http://www.oasis-open.org/docbook/xml/4.4/docbookx.dtd" [
4  <!ENTITY % general-entities SYSTEM "../../general.ent">
5  %general-entities;
6]>
7
8<sect1 id="ch-system-flex" role="wrap">
9  <?dbhtml filename="flex.html"?>
10
11  <title>Flex-&flex-version;</title>
12
13  <indexterm zone="ch-system-flex">
14    <primary sortas="a-Flex">Flex</primary>
15  </indexterm>
16
17  <sect2 role="package">
18    <title/>
19
20    <para>The Flex package contains a utility for generating programs that
21    recognize patterns in text.</para>
22
23  </sect2>
24
25  <sect2 role="installation">
26    <title>Installation of Flex</title>
27
28    <para os="a">Make sure that Flex doesn't try to include headers from /usr/include.</para>
29
30<screen os="b"><userinput>cp -v Makefile.in{,.orig}
31sed "s/-I@includedir@//g" Makefile.in.orig &gt; Makefile.in</userinput></screen>
32
33    <para os="c">Prepare Flex for compilation:</para>
34
35<screen os="d"><userinput>./configure --prefix=/usr --host=${CLFS_TARGET}</userinput></screen>
36
37    <para os="e">Compile the package:</para>
38
39<screen os="f"><userinput>make</userinput></screen>
40
41    <para os="g">Install the package:</para>
42
43<screen os="h"><userinput>make DESTDIR=${CLFS} install</userinput></screen>
44
45    <para os="i">There are some packages that expect to find the
46    <filename class="libraryfile">lex</filename> library in <filename
47    class="directory">/usr/lib</filename>. Create a symlink to account for
48    this:</para>
49
50<screen os="j"><userinput>ln -sv libfl.a ${CLFS}/usr/lib/libl.a</userinput></screen>
51
52    <para os="k">A few programs do not know about <command>flex</command> yet and
53    try to run its predecessor, <command>lex</command>. To support those
54    programs, create a wrapper script named <filename>lex</filename> that
55    calls <filename>flex</filename> in <command>lex</command> emulation
56    mode:</para>
57
58<screen os="l"><userinput>cat &gt; ${CLFS}/usr/bin/lex &lt;&lt; "EOF"
59<literal>#!/bin/sh
60# Begin /usr/bin/lex
61
62exec /usr/bin/flex -l "$@"
63
64# End /usr/bin/lex</literal>
65EOF
66chmod -v 755 ${CLFS}/usr/bin/lex</userinput></screen>
67
68  </sect2>
69
70  <sect2 id="contents-flex" role="content">
71    <title>Contents of Flex</title>
72
73    <segmentedlist>
74      <segtitle>Installed programs</segtitle>
75      <segtitle>Installed library</segtitle>
76
77      <seglistitem>
78        <seg>flex and lex</seg>
79        <seg>libfl.a</seg>
80      </seglistitem>
81    </segmentedlist>
82
83    <variablelist>
84      <bridgehead renderas="sect3">Short Descriptions</bridgehead>
85      <?dbfo list-presentation="list"?>
86      <?dbhtml list-presentation="table"?>
87
88      <varlistentry id="flex">
89        <term><command>flex</command></term>
90        <listitem>
91          <para>A tool for generating programs that recognize patterns in text;
92          it allows for the versatility to specify the rules for pattern-finding,
93          eradicating the need to develop a specialized program</para>
94          <indexterm zone="ch-system-flex flex">
95            <primary sortas="b-flex">flex</primary>
96          </indexterm>
97        </listitem>
98      </varlistentry>
99
100      <varlistentry id="lex">
101        <term><command>lex</command></term>
102        <listitem>
103          <para>A script that runs <command>flex</command> in
104          <command>lex</command> emulation mode</para>
105          <indexterm zone="ch-system-flex lex">
106            <primary sortas="b-lex">lex</primary>
107          </indexterm>
108        </listitem>
109      </varlistentry>
110
111      <varlistentry id="libfl.a">
112        <term><filename class="libraryfile">libfl.a</filename></term>
113        <listitem>
114          <para>The <filename class="libraryfile">flex</filename> library</para>
115          <indexterm zone="ch-system-flex libfl.a">
116            <primary sortas="c-libfl.a">libfl.a</primary>
117          </indexterm>
118        </listitem>
119      </varlistentry>
120
121    </variablelist>
122
123  </sect2>
124
125</sect1>
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