mirror of
https://git.linuxfromscratch.org/lfs.git
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153 lines
4.9 KiB
XML
153 lines
4.9 KiB
XML
<?xml version="1.0" encoding="UTF-8"?>
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<!DOCTYPE sect1 PUBLIC "-//OASIS//DTD DocBook XML V4.5//EN"
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"http://www.oasis-open.org/docbook/xml/4.5/docbookx.dtd" [
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<!ENTITY % general-entities SYSTEM "../general.ent">
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%general-entities;
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]>
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<sect1 id="ch-system-flex" role="wrap">
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<?dbhtml filename="flex.html"?>
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<sect1info condition="script">
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<productname>flex</productname>
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<productnumber>&flex-version;</productnumber>
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<address>&flex-url;</address>
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</sect1info>
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<title>Flex-&flex-version;</title>
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<indexterm zone="ch-system-flex">
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<primary sortas="a-Flex">Flex</primary>
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</indexterm>
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<sect2 role="package">
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<title/>
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<para>The Flex package contains a utility for generating programs that
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recognize patterns in text.</para>
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<segmentedlist>
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<segtitle>&buildtime;</segtitle>
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<segtitle>&diskspace;</segtitle>
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<seglistitem>
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<seg>&flex-fin-sbu;</seg>
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<seg>&flex-fin-du;</seg>
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</seglistitem>
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</segmentedlist>
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</sect2>
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<sect2 role="installation">
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<title>Installation of Flex</title>
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<!--
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<para>First, fix a problem introduced with glibc-2.26:</para>
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<screen><userinput remap="pre">sed -i "/math.h/a #include <malloc.h>" src/flexdef.h</userinput></screen>
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<para>The build procedure assumes the <application>help2man</application>
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program is available to create a man page from the executable - -help option.
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This is not present, so we use an environment variable to skip this process.
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Now, prepare Flex for compilation:</para> -->
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<para>Prepare Flex for compilation:</para>
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<screen><userinput remap="configure">./configure --prefix=/usr \
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--docdir=/usr/share/doc/flex-&flex-version; \
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--disable-static</userinput></screen>
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<para>Compile the package:</para>
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<screen><userinput remap="make">make</userinput></screen>
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<para>To test the results (about 0.5 SBU), issue:</para>
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<screen><userinput remap="test">make check</userinput></screen>
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<para>Install the package:</para>
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<screen><userinput remap="install">make install</userinput></screen>
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<para>A few programs do not know about <command>flex</command> yet and
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try to run its predecessor, <command>lex</command>. To support those
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programs, create a symbolic link named <filename>lex</filename> that
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runs <filename>flex</filename> in <command>lex</command> emulation
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mode, and also create the man page of <command>lex</command> as a
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symlink:</para>
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<screen><userinput remap="install">ln -sv flex /usr/bin/lex
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ln -sv flex.1 /usr/share/man/man1/lex.1</userinput></screen>
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</sect2>
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<sect2 id="contents-flex" role="content">
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<title>Contents of Flex</title>
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<segmentedlist>
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<segtitle>Installed programs</segtitle>
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<segtitle>Installed libraries</segtitle>
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<segtitle>Installed directory</segtitle>
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<seglistitem>
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<seg>flex, flex++ (link to flex), and lex (link to flex)</seg>
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<seg>libfl.so</seg>
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<seg>/usr/share/doc/flex-&flex-version;</seg>
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</seglistitem>
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</segmentedlist>
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<variablelist>
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<bridgehead renderas="sect3">Short Descriptions</bridgehead>
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<?dbfo list-presentation="list"?>
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<?dbhtml list-presentation="table"?>
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<varlistentry id="flex">
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<term><command>flex</command></term>
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<listitem>
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<para>A tool for generating programs that recognize patterns in text;
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it allows for the versatility to specify the rules for pattern-finding,
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eradicating the need to develop a specialized program</para>
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<indexterm zone="ch-system-flex flex">
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<primary sortas="b-flex">flex</primary>
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</indexterm>
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</listitem>
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</varlistentry>
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<varlistentry id="flexpp">
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<term><command>flex++</command></term>
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<listitem>
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<para>An extension of flex, is used for generating C++ code
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and classes. It is a symbolic link to <command>flex</command></para>
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<indexterm zone="ch-system-flex flexpp">
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<primary sortas="b-flex++">flex++</primary>
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</indexterm>
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</listitem>
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</varlistentry>
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<varlistentry id="lex">
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<term><command>lex</command></term>
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<listitem>
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<para>A symbolic link that runs <command>flex</command> in
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<command>lex</command> emulation mode</para>
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<indexterm zone="ch-system-flex lex">
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<primary sortas="b-lex">lex</primary>
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</indexterm>
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</listitem>
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</varlistentry>
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<varlistentry id="libfl">
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<term><filename class="libraryfile">libfl</filename></term>
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<listitem>
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<para>The <filename class="libraryfile">flex</filename> library</para>
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<indexterm zone="ch-system-flex libfl">
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<primary sortas="c-libfl">libfl</primary>
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</indexterm>
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</listitem>
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</varlistentry>
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</variablelist>
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</sect2>
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</sect1>
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