[519ee45] | 1 | <?xml version="1.0" encoding="ISO-8859-1"?>
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| 2 | <!DOCTYPE sect1 PUBLIC "-//OASIS//DTD DocBook XML V4.4//EN"
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| 3 | "http://www.oasis-open.org/docbook/xml/4.4/docbookx.dtd" [
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| 4 | <!ENTITY % general-entities SYSTEM "../general.ent">
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| 5 | %general-entities;
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| 6 | ]>
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| 7 |
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| 8 | <sect1 id="ch-system-flex" role="wrap">
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| 9 | <?dbhtml filename="flex.html"?>
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| 10 |
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| 11 | <title>Flex-&flex-version;</title>
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| 12 |
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| 13 | <indexterm zone="ch-system-flex">
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| 14 | <primary sortas="a-Flex">Flex</primary>
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| 15 | </indexterm>
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| 16 |
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| 17 | <sect2 role="package">
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| 18 | <title/>
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| 19 |
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| 20 | <para>The Flex package contains a utility for generating programs that
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| 21 | recognize patterns in text.</para>
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| 22 |
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| 23 | <segmentedlist>
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| 24 | <segtitle>&buildtime;</segtitle>
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| 25 | <segtitle>&diskspace;</segtitle>
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| 26 |
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| 27 | <seglistitem>
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| 28 | <seg>&flex-ch6-sbu;</seg>
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| 29 | <seg>&flex-ch6-du;</seg>
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| 30 | </seglistitem>
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| 31 | </segmentedlist>
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| 32 |
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| 33 | </sect2>
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| 34 |
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| 35 | <sect2 role="installation">
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| 36 | <title>Installation of Flex</title>
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| 37 |
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| 38 | <para>Prepare Flex for compilation:</para>
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| 39 |
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| 40 | <screen><userinput>./configure --prefix=/usr</userinput></screen>
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| 41 |
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| 42 | <para>Compile the package:</para>
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| 43 |
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| 44 | <screen><userinput>make</userinput></screen>
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| 45 |
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| 46 | <para>To test the results, issue:
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| 47 | <userinput>make check</userinput>.</para>
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| 48 |
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| 49 | <para>Install the package:</para>
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| 50 |
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| 51 | <screen><userinput>make install</userinput></screen>
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| 52 |
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| 53 | <para>There are some packages that expect to find the
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| 54 | <filename class="libraryfile">lex</filename> library in <filename
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| 55 | class="directory">/usr/lib</filename>. Create a symlink to account for
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| 56 | this:</para>
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| 57 |
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| 58 | <screen><userinput>ln -sv libfl.a /usr/lib/libl.a</userinput></screen>
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| 59 |
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| 60 | <para>A few programs do not know about <command>flex</command> yet and
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| 61 | try to run its predecessor, <command>lex</command>. To support those
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| 62 | programs, create a wrapper script named <filename>lex</filename> that
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| 63 | calls <filename>flex</filename> in <command>lex</command> emulation
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| 64 | mode:</para>
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| 65 |
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| 66 | <screen><userinput>cat > /usr/bin/lex << "EOF"
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| 67 | <literal>#!/bin/sh
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| 68 | # Begin /usr/bin/lex
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| 69 |
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| 70 | exec /usr/bin/flex -l "$@"
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| 71 |
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| 72 | # End /usr/bin/lex</literal>
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| 73 | EOF
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| 74 | chmod -v 755 /usr/bin/lex</userinput></screen>
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| 75 |
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| 76 | </sect2>
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| 77 |
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| 78 | <sect2 id="contents-flex" role="content">
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| 79 | <title>Contents of Flex</title>
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| 80 |
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| 81 | <segmentedlist>
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| 82 | <segtitle>Installed programs</segtitle>
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| 83 | <segtitle>Installed library</segtitle>
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| 84 |
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| 85 | <seglistitem>
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| 86 | <seg>flex and lex</seg>
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| 87 | <seg>libfl.a</seg>
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| 88 | </seglistitem>
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| 89 | </segmentedlist>
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| 90 |
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| 91 | <variablelist>
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| 92 | <bridgehead renderas="sect3">Short Descriptions</bridgehead>
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| 93 | <?dbfo list-presentation="list"?>
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| 94 | <?dbhtml list-presentation="table"?>
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| 95 |
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| 96 | <varlistentry id="flex">
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| 97 | <term><command>flex</command></term>
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| 98 | <listitem>
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| 99 | <para>A tool for generating programs that recognize patterns in text;
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| 100 | it allows for the versatility to specify the rules for pattern-finding,
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| 101 | eradicating the need to develop a specialized program</para>
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| 102 | <indexterm zone="ch-system-flex flex">
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| 103 | <primary sortas="b-flex">flex</primary>
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| 104 | </indexterm>
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| 105 | </listitem>
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| 106 | </varlistentry>
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| 107 |
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| 108 | <varlistentry id="lex">
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| 109 | <term><command>lex</command></term>
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| 110 | <listitem>
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| 111 | <para>A script that runs <command>flex</command> in
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| 112 | <command>lex</command> emulation mode</para>
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| 113 | <indexterm zone="ch-system-flex lex">
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| 114 | <primary sortas="b-lex">lex</primary>
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| 115 | </indexterm>
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| 116 | </listitem>
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| 117 | </varlistentry>
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| 118 |
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| 119 | <varlistentry id="libfl.a">
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| 120 | <term><filename class="libraryfile">libfl.a</filename></term>
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| 121 | <listitem>
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| 122 | <para>The <filename class="libraryfile">flex</filename> library</para>
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| 123 | <indexterm zone="ch-system-flex libfl.a">
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| 124 | <primary sortas="c-libfl.a">libfl.a</primary>
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| 125 | </indexterm>
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| 126 | </listitem>
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| 127 | </varlistentry>
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| 128 |
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| 129 | </variablelist>
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| 130 |
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| 131 | </sect2>
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| 132 |
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| 133 | </sect1>
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