source: chapter06/flex.xml@ 040ecb6

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Last change on this file since 040ecb6 was 040ecb6, checked in by Bruce Dubbs <bdubbs@…>, 6 years ago

Update to man-db-2.7.4.
Update to linux-4.2.3.
Update to tzdata2015g.
Many updates to installed files and directories. Huge thanks to Fernando.

git-svn-id: http://svn.linuxfromscratch.org/LFS/trunk/BOOK@10964 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, skip running three regression tests that require Bison:</para>
45
46<screen><userinput remap="pre">sed -i -e '/test-bison/d' tests/Makefile.in</userinput></screen>
47
48 <para>Prepare Flex for compilation:</para>
49
50<screen><userinput remap="configure">./configure --prefix=/usr \
51 --disable-static \
52 --docdir=/usr/share/doc/flex-&flex-version;</userinput></screen>
53
54 <para>Compile the package:</para>
55
56<screen><userinput remap="make">make</userinput></screen>
57
58 <para>To test the results (about 0.5 SBU), issue:</para>
59
60<screen><userinput remap="test">make check</userinput></screen>
61
62 <para>Install the package:</para>
63
64<screen><userinput remap="install">make install</userinput></screen>
65<!--
66 <para>There are some packages that expect to find the
67 <filename class="libraryfile">lex</filename> library in <filename
68 class="directory">/usr/lib</filename>. Create a symlink to account for
69 this:</para>
70
71<screen><userinput remap="install">ln -sv libfl.a /usr/lib/libl.a</userinput></screen>
72-->
73 <para>A few programs do not know about <command>flex</command> yet and
74 try to run its predecessor, <command>lex</command>. To support those
75 programs, create a symbolic link named <filename>lex</filename> that
76 runs <filename>flex</filename> in <command>lex</command> emulation
77 mode:</para>
78
79<screen><userinput remap="install">ln -sv flex /usr/bin/lex</userinput></screen>
80
81 </sect2>
82
83 <sect2 id="contents-flex" role="content">
84 <title>Contents of Flex</title>
85
86 <segmentedlist>
87 <segtitle>Installed programs</segtitle>
88 <segtitle>Installed libraries</segtitle>
89 <segtitle>Installed directory</segtitle>
90
91 <seglistitem>
92 <seg>flex, flex++ (link to flex), and lex (link to flex)</seg>
93 <seg>libfl.so and libfl_pic.so</seg>
94 <seg>/usr/share/doc/flex-&flex-version;</seg>
95 </seglistitem>
96 </segmentedlist>
97
98 <variablelist>
99 <bridgehead renderas="sect3">Short Descriptions</bridgehead>
100 <?dbfo list-presentation="list"?>
101 <?dbhtml list-presentation="table"?>
102
103 <varlistentry id="flex">
104 <term><command>flex</command></term>
105 <listitem>
106 <para>A tool for generating programs that recognize patterns in text;
107 it allows for the versatility to specify the rules for pattern-finding,
108 eradicating the need to develop a specialized program</para>
109 <indexterm zone="ch-system-flex flex">
110 <primary sortas="b-flex">flex</primary>
111 </indexterm>
112 </listitem>
113 </varlistentry>
114
115 <varlistentry id="flexpp">
116 <term><command>flex++</command></term>
117 <listitem>
118 <para>An extension of flex, is used for generating C++ code
119 and classes. It is a symbolic link to <command>flex</command></para>
120 <indexterm zone="ch-system-flex flexpp">
121 <primary sortas="b-flex++">flex++</primary>
122 </indexterm>
123 </listitem>
124 </varlistentry>
125
126 <varlistentry id="lex">
127 <term><command>lex</command></term>
128 <listitem>
129 <para>A script that runs <command>flex</command> in
130 <command>lex</command> emulation mode</para>
131 <indexterm zone="ch-system-flex lex">
132 <primary sortas="b-lex">lex</primary>
133 </indexterm>
134 </listitem>
135 </varlistentry>
136
137 <varlistentry id="libfl">
138 <term><filename class="libraryfile">libfl</filename></term>
139 <listitem>
140 <para>The <filename class="libraryfile">flex</filename> library</para>
141 <indexterm zone="ch-system-flex libfl">
142 <primary sortas="c-libfl">libfl</primary>
143 </indexterm>
144 </listitem>
145 </varlistentry>
146
147 </variablelist>
148
149 </sect2>
150
151</sect1>
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