source: chapter06/flex.xml@ 03e6064

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Last change on this file since 03e6064 was 03e6064, checked in by Bruce Dubbs <bdubbs@…>, 4 years ago

Typos and minor corrections

git-svn-id: http://svn.linuxfromscratch.org/LFS/trunk/BOOK@11401 4aa44e1e-78dd-0310-a6d2-fbcd4c07a689

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1<?xml version="1.0" encoding="ISO-8859-1"?>
2<!DOCTYPE sect1 PUBLIC "-//OASIS//DTD DocBook XML V4.5//EN"
3 "http://www.oasis-open.org/docbook/xml/4.5/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 <sect1info condition="script">
12 <productname>flex</productname>
13 <productnumber>&flex-version;</productnumber>
14 <address>&flex-url;</address>
15 </sect1info>
16
17 <title>Flex-&flex-version;</title>
18
19 <indexterm zone="ch-system-flex">
20 <primary sortas="a-Flex">Flex</primary>
21 </indexterm>
22
23 <sect2 role="package">
24 <title/>
25
26 <para>The Flex package contains a utility for generating programs that
27 recognize patterns in text.</para>
28
29 <segmentedlist>
30 <segtitle>&buildtime;</segtitle>
31 <segtitle>&diskspace;</segtitle>
32
33 <seglistitem>
34 <seg>&flex-ch6-sbu;</seg>
35 <seg>&flex-ch6-du;</seg>
36 </seglistitem>
37 </segmentedlist>
38
39 </sect2>
40
41 <sect2 role="installation">
42 <title>Installation of Flex</title>
43
44 <para>First, fix a problem introduced with glibc-2.26:</para>
45
46<screen><userinput remap="pre">sed -i "/math.h/a #include &lt;malloc.h&gt;" src/flexdef.h</userinput></screen>
47
48 <para>The build procedure assumes the <application>help2man</application>
49 program is available to create a man page from the executable --help option.
50 This is not present, so we use an environment variable to skip this process.
51 Now, prepare Flex for compilation:</para>
52
53<screen><userinput remap="configure">HELP2MAN=/tools/bin/true \
54./configure --prefix=/usr --docdir=/usr/share/doc/flex-&flex-version;</userinput></screen>
55
56 <para>Compile the package:</para>
57
58<screen><userinput remap="make">make</userinput></screen>
59
60 <para>To test the results (about 0.5 SBU), issue:</para>
61
62<screen><userinput remap="test">make check</userinput></screen>
63
64 <para>Install the package:</para>
65
66<screen><userinput remap="install">make install</userinput></screen>
67
68 <para>A few programs do not know about <command>flex</command> yet and
69 try to run its predecessor, <command>lex</command>. To support those
70 programs, create a symbolic link named <filename>lex</filename> that
71 runs <filename>flex</filename> in <command>lex</command> emulation
72 mode:</para>
73
74<screen><userinput remap="install">ln -sv flex /usr/bin/lex</userinput></screen>
75
76 </sect2>
77
78 <sect2 id="contents-flex" role="content">
79 <title>Contents of Flex</title>
80
81 <segmentedlist>
82 <segtitle>Installed programs</segtitle>
83 <segtitle>Installed libraries</segtitle>
84 <segtitle>Installed directory</segtitle>
85
86 <seglistitem>
87 <seg>flex, flex++ (link to flex), and lex (link to flex)</seg>
88 <seg>libfl.so</seg>
89 <seg>/usr/share/doc/flex-&flex-version;</seg>
90 </seglistitem>
91 </segmentedlist>
92
93 <variablelist>
94 <bridgehead renderas="sect3">Short Descriptions</bridgehead>
95 <?dbfo list-presentation="list"?>
96 <?dbhtml list-presentation="table"?>
97
98 <varlistentry id="flex">
99 <term><command>flex</command></term>
100 <listitem>
101 <para>A tool for generating programs that recognize patterns in text;
102 it allows for the versatility to specify the rules for pattern-finding,
103 eradicating the need to develop a specialized program</para>
104 <indexterm zone="ch-system-flex flex">
105 <primary sortas="b-flex">flex</primary>
106 </indexterm>
107 </listitem>
108 </varlistentry>
109
110 <varlistentry id="flexpp">
111 <term><command>flex++</command></term>
112 <listitem>
113 <para>An extension of flex, is used for generating C++ code
114 and classes. It is a symbolic link to <command>flex</command></para>
115 <indexterm zone="ch-system-flex flexpp">
116 <primary sortas="b-flex++">flex++</primary>
117 </indexterm>
118 </listitem>
119 </varlistentry>
120
121 <varlistentry id="lex">
122 <term><command>lex</command></term>
123 <listitem>
124 <para>A symbolic link that runs <command>flex</command> in
125 <command>lex</command> emulation mode</para>
126 <indexterm zone="ch-system-flex lex">
127 <primary sortas="b-lex">lex</primary>
128 </indexterm>
129 </listitem>
130 </varlistentry>
131
132 <varlistentry id="libfl">
133 <term><filename class="libraryfile">libfl</filename></term>
134 <listitem>
135 <para>The <filename class="libraryfile">flex</filename> library</para>
136 <indexterm zone="ch-system-flex libfl">
137 <primary sortas="c-libfl">libfl</primary>
138 </indexterm>
139 </listitem>
140 </varlistentry>
141
142 </variablelist>
143
144 </sect2>
145
146</sect1>
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