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 | <!ENTITY % patches-entities SYSTEM "../../patches.ent"> |
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6 | %general-entities; |
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7 | %patches-entities; |
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8 | ]> |
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9 | |
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10 | <sect1 id="ch-system-flex" role="wrap"> |
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11 | <?dbhtml filename="flex.html"?> |
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12 | |
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13 | <title>Flex-&flex-version;</title> |
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14 | |
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15 | <indexterm zone="ch-system-flex"> |
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16 | <primary sortas="a-Flex">Flex</primary> |
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17 | </indexterm> |
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18 | |
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19 | <sect2 role="package"> |
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20 | <title/> |
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21 | |
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22 | <para>The Flex package contains a utility for generating programs that |
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23 | recognize patterns in text.</para> |
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24 | |
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25 | <segmentedlist> |
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26 | <segtitle>&buildtime;</segtitle> |
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27 | <segtitle>&diskspace;</segtitle> |
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28 | |
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29 | <seglistitem> |
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30 | <seg>Not checked yet</seg> |
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31 | <seg>Not checked yet</seg> |
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32 | </seglistitem> |
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33 | </segmentedlist> |
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34 | |
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35 | <segmentedlist> |
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36 | <segtitle>&dependencies;</segtitle> |
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37 | |
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38 | <seglistitem> |
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39 | <seg>Bash, Binutils, Bison, Coreutils, Diffutils, |
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40 | GCC, Gettext, Glibc, Grep, M4, Make, and Sed</seg> |
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41 | </seglistitem> |
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42 | </segmentedlist> |
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43 | |
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44 | </sect2> |
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45 | |
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46 | <sect2 role="installation"> |
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47 | <title>Installation of Flex</title> |
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48 | |
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49 | <para os="a">Flex contains several known bugs. Fix these with the following |
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50 | patch:</para> |
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51 | |
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52 | <screen os="b"><userinput>patch -Np1 -i ../&flex-fixes-patch;</userinput></screen> |
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53 | |
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54 | <para os="c">The GNU autotools detects that the Flex source code has been |
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55 | modified by the previous patch and tries to update the man page |
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56 | accordingly. This does not work correctly on many systems, and the |
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57 | default page is fine, so make sure it does not get regenerated:</para> |
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58 | |
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59 | <screen os="d"><userinput>touch doc/flex.1</userinput></screen> |
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60 | |
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61 | <para os="e">Prepare Flex for compilation:</para> |
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62 | |
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63 | <screen><userinput>./configure --prefix=/usr</userinput></screen> |
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64 | |
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65 | <para os="f">Compile the package:</para> |
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66 | |
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67 | <screen os="g"><userinput>make</userinput></screen> |
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68 | |
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69 | <para os="h">To test the results, issue: |
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70 | <userinput>make check</userinput>.</para> |
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71 | |
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72 | <para os="i">Install the package:</para> |
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73 | |
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74 | <screen os="j"><userinput>make install</userinput></screen> |
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75 | |
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76 | <para os="k">There are some packages that expect to find the |
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77 | <filename class="libraryfile">lex</filename> library in <filename |
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78 | class="directory">/usr/lib</filename>. Create a symlink to account for |
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79 | this:</para> |
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80 | |
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81 | <screen os="l"><userinput>ln -s libfl.a /usr/lib/libl.a</userinput></screen> |
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82 | |
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83 | <para os="m">A few programs do not know about <command>flex</command> yet and |
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84 | try to run its predecessor, <command>lex</command>. To support those |
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85 | programs, create a wrapper script named <filename>lex</filename> that |
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86 | calls <filename>flex</filename> in <command>lex</command> emulation |
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87 | mode:</para> |
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88 | |
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89 | <screen os="n"><userinput>cat > /usr/bin/lex << "EOF" |
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90 | <literal>#!/bin/sh |
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91 | # Begin /usr/bin/lex |
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92 | |
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93 | exec /usr/bin/flex -l "$@" |
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94 | |
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95 | # End /usr/bin/lex</literal> |
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96 | EOF |
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97 | chmod 755 /usr/bin/lex</userinput></screen> |
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98 | |
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99 | </sect2> |
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100 | |
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101 | <sect2 id="contents-flex" role="content"> |
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102 | <title>Contents of Flex</title> |
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103 | |
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104 | <segmentedlist> |
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105 | <segtitle>Installed programs</segtitle> |
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106 | <segtitle>Installed library</segtitle> |
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107 | |
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108 | <seglistitem> |
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109 | <seg>flex and lex</seg> |
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110 | <seg>libfl.a</seg> |
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111 | </seglistitem> |
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112 | </segmentedlist> |
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113 | |
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114 | <variablelist> |
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115 | <bridgehead renderas="sect3">Short Descriptions</bridgehead> |
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116 | <?dbfo list-presentation="list"?> |
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117 | <?dbhtml list-presentation="table"?> |
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118 | |
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119 | <varlistentry id="flex"> |
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120 | <term><command>flex</command></term> |
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121 | <listitem> |
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122 | <para>A tool for generating programs that recognize patterns in text; |
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123 | it allows for the versatility to specify the rules for pattern-finding, |
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124 | eradicating the need to develop a specialized program</para> |
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125 | <indexterm zone="ch-system-flex flex"> |
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126 | <primary sortas="b-flex">flex</primary> |
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127 | </indexterm> |
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128 | </listitem> |
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129 | </varlistentry> |
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130 | |
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131 | <varlistentry id="lex"> |
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132 | <term><command>lex</command></term> |
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133 | <listitem> |
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134 | <para>A script that runs <command>flex</command> in |
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135 | <command>lex</command> emulation mode</para> |
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136 | <indexterm zone="ch-system-flex lex"> |
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137 | <primary sortas="b-lex">lex</primary> |
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138 | </indexterm> |
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139 | </listitem> |
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140 | </varlistentry> |
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141 | |
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142 | <varlistentry id="libfl.a"> |
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143 | <term><filename class="libraryfile">libfl.a</filename></term> |
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144 | <listitem> |
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145 | <para>The <filename class="libraryfile">flex</filename> library</para> |
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146 | <indexterm zone="ch-system-flex libfl.a"> |
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147 | <primary sortas="c-libfl.a">libfl.a</primary> |
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148 | </indexterm> |
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149 | </listitem> |
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150 | </varlistentry> |
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151 | |
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152 | </variablelist> |
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153 | |
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154 | </sect2> |
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155 | |
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156 | </sect1> |
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