[02095ae] | 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 | </sect2> |
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| 24 | |
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| 25 | <sect2 role="installation"> |
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| 26 | <title>Installation of Flex</title> |
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| 27 | |
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| 28 | <para os="a">Make sure that Flex doesn't try to include headers from /usr/include.</para> |
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| 29 | |
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| 30 | <screen os="b"><userinput>cp -v Makefile.in{,.orig} |
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| 31 | sed "s/-I@includedir@//g" Makefile.in.orig > Makefile.in</userinput></screen> |
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| 32 | |
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| 33 | <para os="c">Prepare Flex for compilation:</para> |
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| 34 | |
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| 35 | <screen os="d"><userinput>./configure --prefix=/usr --host=${LFS_TARGET}</userinput></screen> |
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| 36 | |
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| 37 | <para os="e">Compile the package:</para> |
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| 38 | |
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| 39 | <screen os="f"><userinput>make</userinput></screen> |
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| 40 | |
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| 41 | <para os="g">Install the package:</para> |
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| 42 | |
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| 43 | <screen os="h"><userinput>make DESTDIR=${LFS} install</userinput></screen> |
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| 44 | |
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| 45 | <para os="i">There are some packages that expect to find the |
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| 46 | <filename class="libraryfile">lex</filename> library in <filename |
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| 47 | class="directory">/usr/lib</filename>. Create a symlink to account for |
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| 48 | this:</para> |
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| 49 | |
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| 50 | <screen os="j"><userinput>ln -sv libfl.a ${LFS}/usr/lib/libl.a</userinput></screen> |
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| 51 | |
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| 52 | <para os="k">A few programs do not know about <command>flex</command> yet and |
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| 53 | try to run its predecessor, <command>lex</command>. To support those |
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| 54 | programs, create a wrapper script named <filename>lex</filename> that |
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| 55 | calls <filename>flex</filename> in <command>lex</command> emulation |
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| 56 | mode:</para> |
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| 57 | |
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| 58 | <screen os="l"><userinput>cat > ${LFS}/usr/bin/lex << "EOF" |
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| 59 | <literal>#!/bin/sh |
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| 60 | # Begin /usr/bin/lex |
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| 61 | |
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| 62 | exec /usr/bin/flex -l "$@" |
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| 63 | |
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| 64 | # End /usr/bin/lex</literal> |
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| 65 | EOF |
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| 66 | chmod -v 755 ${LFS}/usr/bin/lex</userinput></screen> |
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| 67 | |
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| 68 | </sect2> |
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| 69 | |
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| 70 | <sect2 id="contents-flex" role="content"> |
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| 71 | <title>Contents of Flex</title> |
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| 72 | |
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| 73 | <segmentedlist> |
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| 74 | <segtitle>Installed programs</segtitle> |
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| 75 | <segtitle>Installed library</segtitle> |
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| 76 | |
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| 77 | <seglistitem> |
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| 78 | <seg>flex and lex</seg> |
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| 79 | <seg>libfl.a</seg> |
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| 80 | </seglistitem> |
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| 81 | </segmentedlist> |
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| 82 | |
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| 83 | <variablelist> |
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| 84 | <bridgehead renderas="sect3">Short Descriptions</bridgehead> |
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| 85 | <?dbfo list-presentation="list"?> |
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| 86 | <?dbhtml list-presentation="table"?> |
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| 87 | |
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| 88 | <varlistentry id="flex"> |
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| 89 | <term><command>flex</command></term> |
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| 90 | <listitem> |
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| 91 | <para>A tool for generating programs that recognize patterns in text; |
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| 92 | it allows for the versatility to specify the rules for pattern-finding, |
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| 93 | eradicating the need to develop a specialized program</para> |
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| 94 | <indexterm zone="ch-system-flex flex"> |
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| 95 | <primary sortas="b-flex">flex</primary> |
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| 96 | </indexterm> |
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| 97 | </listitem> |
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| 98 | </varlistentry> |
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| 99 | |
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| 100 | <varlistentry id="lex"> |
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| 101 | <term><command>lex</command></term> |
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| 102 | <listitem> |
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| 103 | <para>A script that runs <command>flex</command> in |
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| 104 | <command>lex</command> emulation mode</para> |
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| 105 | <indexterm zone="ch-system-flex lex"> |
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| 106 | <primary sortas="b-lex">lex</primary> |
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| 107 | </indexterm> |
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| 108 | </listitem> |
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| 109 | </varlistentry> |
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| 110 | |
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| 111 | <varlistentry id="libfl.a"> |
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| 112 | <term><filename class="libraryfile">libfl.a</filename></term> |
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| 113 | <listitem> |
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| 114 | <para>The <filename class="libraryfile">flex</filename> library</para> |
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| 115 | <indexterm zone="ch-system-flex libfl.a"> |
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| 116 | <primary sortas="c-libfl.a">libfl.a</primary> |
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| 117 | </indexterm> |
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| 118 | </listitem> |
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| 119 | </varlistentry> |
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| 120 | |
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| 121 | </variablelist> |
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| 122 | |
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| 123 | </sect2> |
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| 124 | |
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| 125 | </sect1> |
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