source: chapter06/flex.xml@ ac88e44

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Last change on this file since ac88e44 was ac88e44, checked in by Bruce Dubbs <bdubbs@…>, 6 years ago

Update to vim-8.0.069.
Update to tzdata-2016i.
Update to file-5.29.
Update to flex-2.6.2.
Update to linux-4.8.6.
Update to util-linux-2.29.

git-svn-id: http://svn.linuxfromscratch.org/LFS/trunk/BOOK@11142 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>The build procedure assumes the <application>help2man</application>
45 program is available to create a man page from the executable --help option.
46 This is not present, so we use an environment variable to skip this process.
47 Now, prepare Flex for compilation:</para>
48
49<screen><userinput remap="configure">HELP2MAN=/tools/bin/true \
50./configure --prefix=/usr --docdir=/usr/share/doc/flex-&flex-version;</userinput></screen>
51
52 <para>Compile the package:</para>
53
54<screen><userinput remap="make">make</userinput></screen>
55
56 <para>To test the results (about 0.5 SBU), issue:</para>
57
58<screen><userinput remap="test">make check</userinput></screen>
59
60 <para>There is one known test failure.</para>
61
62 <para>Install the package:</para>
63
64<screen><userinput remap="install">make install</userinput></screen>
65
66 <para>A few programs do not know about <command>flex</command> yet and
67 try to run its predecessor, <command>lex</command>. To support those
68 programs, create a symbolic link named <filename>lex</filename> that
69 runs <filename>flex</filename> in <command>lex</command> emulation
70 mode:</para>
71
72<screen><userinput remap="install">ln -sv flex /usr/bin/lex</userinput></screen>
73
74 </sect2>
75
76 <sect2 id="contents-flex" role="content">
77 <title>Contents of Flex</title>
78
79 <segmentedlist>
80 <segtitle>Installed programs</segtitle>
81 <segtitle>Installed libraries</segtitle>
82 <segtitle>Installed directory</segtitle>
83
84 <seglistitem>
85 <seg>flex, flex++ (link to flex), and lex (link to flex)</seg>
86 <seg>libfl.so and libfl_pic.so</seg>
87 <seg>/usr/share/doc/flex-&flex-version;</seg>
88 </seglistitem>
89 </segmentedlist>
90
91 <variablelist>
92 <bridgehead renderas="sect3">Short Descriptions</bridgehead>
93 <?dbfo list-presentation="list"?>
94 <?dbhtml list-presentation="table"?>
95
96 <varlistentry id="flex">
97 <term><command>flex</command></term>
98 <listitem>
99 <para>A tool for generating programs that recognize patterns in text;
100 it allows for the versatility to specify the rules for pattern-finding,
101 eradicating the need to develop a specialized program</para>
102 <indexterm zone="ch-system-flex flex">
103 <primary sortas="b-flex">flex</primary>
104 </indexterm>
105 </listitem>
106 </varlistentry>
107
108 <varlistentry id="flexpp">
109 <term><command>flex++</command></term>
110 <listitem>
111 <para>An extension of flex, is used for generating C++ code
112 and classes. It is a symbolic link to <command>flex</command></para>
113 <indexterm zone="ch-system-flex flexpp">
114 <primary sortas="b-flex++">flex++</primary>
115 </indexterm>
116 </listitem>
117 </varlistentry>
118
119 <varlistentry id="lex">
120 <term><command>lex</command></term>
121 <listitem>
122 <para>A script that runs <command>flex</command> in
123 <command>lex</command> emulation mode</para>
124 <indexterm zone="ch-system-flex lex">
125 <primary sortas="b-lex">lex</primary>
126 </indexterm>
127 </listitem>
128 </varlistentry>
129
130 <varlistentry id="libfl">
131 <term><filename class="libraryfile">libfl</filename></term>
132 <listitem>
133 <para>The <filename class="libraryfile">flex</filename> library</para>
134 <indexterm zone="ch-system-flex libfl">
135 <primary sortas="c-libfl">libfl</primary>
136 </indexterm>
137 </listitem>
138 </varlistentry>
139
140 </variablelist>
141
142 </sect2>
143
144</sect1>
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