source: clfs-sysroot/BOOK/final-system/common/flex.xml@ a18aefd

Last change on this file since a18aefd was c439b8a, checked in by Manuel Canales Esparcia <manuel@…>, 18 years ago

Updated CLFS-Sysroot book sources to use DocBook-XML DTD 4.5.

  • Property mode set to 100644
File size: 3.9 KB
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[02095ae]1<?xml version="1.0" encoding="ISO-8859-1"?>
[c439b8a]2<!DOCTYPE sect1 PUBLIC "-//OASIS//DTD DocBook XML V4.5//EN"
3 "http://www.oasis-open.org/docbook/xml/4.5/docbookx.dtd" [
[02095ae]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
[cee2ca2]35<screen os="d"><userinput>./configure --build=${CLFS_HOST} --host=${CLFS_TARGET} \
36 --prefix=/usr</userinput></screen>
[02095ae]37
38 <para os="e">Compile the package:</para>
39
40<screen os="f"><userinput>make</userinput></screen>
41
42 <para os="g">Install the package:</para>
43
[586feb7]44<screen os="h"><userinput>make DESTDIR=${CLFS} install</userinput></screen>
[02095ae]45
46 <para os="i">There are some packages that expect to find the
47 <filename class="libraryfile">lex</filename> library in <filename
48 class="directory">/usr/lib</filename>. Create a symlink to account for
49 this:</para>
50
[7e336f1]51<screen os="j"><userinput>ln -sfv libfl.a ${CLFS}/usr/lib/libl.a</userinput></screen>
[02095ae]52
53 <para os="k">A few programs do not know about <command>flex</command> yet and
54 try to run its predecessor, <command>lex</command>. To support those
55 programs, create a wrapper script named <filename>lex</filename> that
56 calls <filename>flex</filename> in <command>lex</command> emulation
57 mode:</para>
58
[586feb7]59<screen os="l"><userinput>cat &gt; ${CLFS}/usr/bin/lex &lt;&lt; "EOF"
[02095ae]60<literal>#!/bin/sh
61# Begin /usr/bin/lex
62
63exec /usr/bin/flex -l "$@"
64
65# End /usr/bin/lex</literal>
66EOF
[586feb7]67chmod -v 755 ${CLFS}/usr/bin/lex</userinput></screen>
[02095ae]68
69 </sect2>
70
71 <sect2 id="contents-flex" role="content">
72 <title>Contents of Flex</title>
73
74 <segmentedlist>
75 <segtitle>Installed programs</segtitle>
76 <segtitle>Installed library</segtitle>
77
78 <seglistitem>
79 <seg>flex and lex</seg>
80 <seg>libfl.a</seg>
81 </seglistitem>
82 </segmentedlist>
83
84 <variablelist>
85 <bridgehead renderas="sect3">Short Descriptions</bridgehead>
86 <?dbfo list-presentation="list"?>
87 <?dbhtml list-presentation="table"?>
88
89 <varlistentry id="flex">
90 <term><command>flex</command></term>
91 <listitem>
92 <para>A tool for generating programs that recognize patterns in text;
93 it allows for the versatility to specify the rules for pattern-finding,
94 eradicating the need to develop a specialized program</para>
95 <indexterm zone="ch-system-flex flex">
96 <primary sortas="b-flex">flex</primary>
97 </indexterm>
98 </listitem>
99 </varlistentry>
100
101 <varlistentry id="lex">
102 <term><command>lex</command></term>
103 <listitem>
104 <para>A script that runs <command>flex</command> in
105 <command>lex</command> emulation mode</para>
106 <indexterm zone="ch-system-flex lex">
107 <primary sortas="b-lex">lex</primary>
108 </indexterm>
109 </listitem>
110 </varlistentry>
111
112 <varlistentry id="libfl.a">
113 <term><filename class="libraryfile">libfl.a</filename></term>
114 <listitem>
115 <para>The <filename class="libraryfile">flex</filename> library</para>
116 <indexterm zone="ch-system-flex libfl.a">
117 <primary sortas="c-libfl.a">libfl.a</primary>
118 </indexterm>
119 </listitem>
120 </varlistentry>
121
122 </variablelist>
123
124 </sect2>
125
126</sect1>
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