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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