[673b0d8] | 1 | <?xml version="1.0" encoding="ISO-8859-1"?>
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[9e58b5a0] | 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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[673b0d8] | 4 | <!ENTITY % general-entities SYSTEM "../general.ent">
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| 5 | %general-entities;
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| 6 | ]>
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[9e58b5a0] | 7 |
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[81fd230] | 8 | <sect1 id="ch-system-flex" role="wrap">
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[9e58b5a0] | 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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[673b0d8] | 19 |
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[9e58b5a0] | 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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[6370fa6] | 22 |
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[9e58b5a0] | 23 | <segmentedlist>
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| 24 | <segtitle>&buildtime;</segtitle>
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| 25 | <segtitle>&diskspace;</segtitle>
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[5888299] | 26 |
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[9e58b5a0] | 27 | <seglistitem>
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| 28 | <seg>0.1 SBU</seg>
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| 29 | <seg>22.5 MB</seg>
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| 30 | </seglistitem>
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| 31 | </segmentedlist>
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[673b0d8] | 32 |
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[9e58b5a0] | 33 | <segmentedlist>
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| 34 | <segtitle>&dependencies;</segtitle>
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[3554fa3a] | 35 |
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[9e58b5a0] | 36 | <seglistitem>
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| 37 | <seg>Bash, Binutils, Bison, Coreutils, Diffutils, GCC, Gettext,
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| 38 | Glibc, Grep, M4, Make, and Sed</seg>
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| 39 | </seglistitem>
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| 40 | </segmentedlist>
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[73aedd1d] | 41 |
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[9e58b5a0] | 42 | </sect2>
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| 43 |
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| 44 | <sect2 role="installation">
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| 45 | <title>Installation of Flex</title>
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| 46 |
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| 47 | <para>Flex contains several known bugs. Fix these with the following
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| 48 | patch:</para>
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[9dfc02f] | 49 |
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[3e36a78] | 50 | <screen><userinput>patch -Np1 -i ../&flex-fixes-patch;</userinput></screen>
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[9dfc02f] | 51 |
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[9e58b5a0] | 52 | <para>The GNU autotools detects that the Flex source code has been
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| 53 | modified by the previous patch and tries to update the man page
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| 54 | accordingly. This does not work correctly on many systems, and the
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| 55 | default page is fine, so make sure it does not get regenerated:</para>
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[9dfc02f] | 56 |
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[2def124] | 57 | <screen><userinput>touch doc/flex.1</userinput></screen>
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[9dfc02f] | 58 |
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[9e58b5a0] | 59 | <para>Prepare Flex for compilation:</para>
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[73aedd1d] | 60 |
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| 61 | <screen><userinput>./configure --prefix=/usr</userinput></screen>
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| 62 |
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[9e58b5a0] | 63 | <para>Compile the package:</para>
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[73aedd1d] | 64 |
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| 65 | <screen><userinput>make</userinput></screen>
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| 66 |
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[9e58b5a0] | 67 | <para>To test the results, issue:
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| 68 | <userinput>make check</userinput>.</para>
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[73aedd1d] | 69 |
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[9e58b5a0] | 70 | <para>Install the package:</para>
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[73aedd1d] | 71 |
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| 72 | <screen><userinput>make install</userinput></screen>
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| 73 |
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[9e58b5a0] | 74 | <para>There are some packages that expect to find the
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| 75 | <filename class="libraryfile">lex</filename> library in <filename
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| 76 | class="directory">/usr/lib</filename>. Create a symlink to account for
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| 77 | this:</para>
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[73aedd1d] | 78 |
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[5998892] | 79 | <screen><userinput>ln -sv libfl.a /usr/lib/libl.a</userinput></screen>
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[73aedd1d] | 80 |
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[9e58b5a0] | 81 | <para>A few programs do not know about <command>flex</command> yet and
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| 82 | try to run its predecessor, <command>lex</command>. To support those
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| 83 | programs, create a wrapper script named <filename>lex</filename> that
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| 84 | calls <filename>flex</filename> in <command>lex</command> emulation
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| 85 | mode:</para>
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[73aedd1d] | 86 |
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[d72e04a] | 87 | <screen><userinput>cat > /usr/bin/lex << "EOF"
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| 88 | <literal>#!/bin/sh
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[73aedd1d] | 89 | # Begin /usr/bin/lex
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| 90 |
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| 91 | exec /usr/bin/flex -l "$@"
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| 92 |
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[d72e04a] | 93 | # End /usr/bin/lex</literal>
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| 94 | EOF
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[5998892] | 95 | chmod -v 755 /usr/bin/lex</userinput></screen>
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[73aedd1d] | 96 |
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[9e58b5a0] | 97 | </sect2>
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| 98 |
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| 99 | <sect2 id="contents-flex" role="content">
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| 100 | <title>Contents of Flex</title>
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| 101 |
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| 102 | <segmentedlist>
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| 103 | <segtitle>Installed programs</segtitle>
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| 104 | <segtitle>Installed library</segtitle>
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| 105 |
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| 106 | <seglistitem>
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| 107 | <seg>flex and lex</seg>
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| 108 | <seg>libfl.a</seg>
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| 109 | </seglistitem>
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| 110 | </segmentedlist>
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| 111 |
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| 112 | <variablelist>
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| 113 | <bridgehead renderas="sect3">Short Descriptions</bridgehead>
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| 114 | <?dbfo list-presentation="list"?>
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| 115 | <?dbhtml list-presentation="table"?>
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| 116 |
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| 117 | <varlistentry id="flex">
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| 118 | <term><command>flex</command></term>
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| 119 | <listitem>
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| 120 | <para>A tool for generating programs that recognize patterns in text;
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| 121 | it allows for the versatility to specify the rules for pattern-finding,
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| 122 | eradicating the need to develop a specialized program</para>
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| 123 | <indexterm zone="ch-system-flex flex">
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| 124 | <primary sortas="b-flex">flex</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 | <varlistentry id="lex">
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| 130 | <term><command>lex</command></term>
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| 131 | <listitem>
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| 132 | <para>A script that runs <command>flex</command> in
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| 133 | <command>lex</command> emulation mode</para>
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| 134 | <indexterm zone="ch-system-flex lex">
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| 135 | <primary sortas="b-lex">lex</primary>
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| 136 | </indexterm>
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| 137 | </listitem>
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| 138 | </varlistentry>
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| 139 |
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| 140 | <varlistentry id="libfl.a">
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| 141 | <term><filename class="libraryfile">libfl.a</filename></term>
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| 142 | <listitem>
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| 143 | <para>The <filename class="libraryfile">flex</filename> library</para>
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| 144 | <indexterm zone="ch-system-flex libfl.a">
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| 145 | <primary sortas="c-libfl.a">libfl.a</primary>
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| 146 | </indexterm>
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| 147 | </listitem>
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| 148 | </varlistentry>
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| 149 |
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| 150 | </variablelist>
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| 151 |
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| 152 | </sect2>
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[673b0d8] | 153 |
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| 154 | </sect1>
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