lfs-book/chapter06/pcre.xml

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  "http://www.oasis-open.org/docbook/xml/4.5/docbookx.dtd" [
  <!ENTITY % general-entities SYSTEM "../general.ent">
  %general-entities;
]>

<sect1 id="ch-system-pcre" role="wrap">
  <?dbhtml filename="pcre.html"?>

  <sect1info condition="script">
    <productname>pcre</productname>
    <productnumber>&pcre-version;</productnumber>
    <address>&pcre-url;</address>
  </sect1info>

  <title>PCRE-&pcre-version;</title>

  <indexterm zone="ch-system-pcre">
    <primary sortas="a-PCRE">PCRE</primary>
  </indexterm>

  <sect2 role="package">
    <title/>

    <para>The PCRE package contains Perl Compatible Regular Expression
    libraries. These are useful for implementing regular expression pattern
    matching using the same syntax and semantics as Perl 5.</para>

    <segmentedlist>
      <segtitle>&buildtime;</segtitle>
      <segtitle>&diskspace;</segtitle>

      <seglistitem>
        <seg>&pcre-ch6-sbu;</seg>
        <seg>&pcre-ch6-du;</seg>
      </seglistitem>
    </segmentedlist>

  </sect2>

  <sect2 role="installation">
    <title>Installation of PCRE</title>

    <para>Prepare PCRE for compilation:</para>

<screen><userinput remap="configure">./configure --prefix=/usr \
            --docdir=/usr/share/doc/pcre-&pcre-version; \
            --enable-utf8 \
            --enable-unicode-properties \
            --enable-pcregrep-libz \
            --enable-pcregrep-libbz2</userinput></screen>

    <variablelist>
      <title>The meaning of the configure options:</title>

      <varlistentry>
        <term><parameter>--enable-utf8</parameter></term>
        <listitem>
          <para>This switch includes the code for handling UTF-8 character
                strings in the library.</para>
        </listitem>
      </varlistentry>
      <varlistentry>
        <term><parameter>--enable-unicode-properties</parameter></term>
        <listitem>
          <para>This switch enables Unicode properties support.</para>
        </listitem>
      </varlistentry>
      <varlistentry>
        <term><parameter>--enable-pcregrep-lib*</parameter></term>
        <listitem>
          <para>These switches enable the PCRE library to read files compressed
          with <command>gzip</command> and <command>bzip2</command>.</para>
        </listitem>
      </varlistentry>
    </variablelist>

    <para>Compile the package:</para>

<screen><userinput remap="make">make</userinput></screen>

    <para>To test the results, issue:</para>

<screen><userinput remap="test">make check</userinput></screen>

    <para>Install the package:</para>

<screen><userinput remap="install">make install</userinput></screen>

    <para>The <command>grep</command> binary will be installed in <filename class="directory">/bin</filename> and will link against the PCRE library; as such,
move the library to <filename class="directory">/lib</filename>:</para>

<screen><userinput remap="install">mv -v /usr/lib/libpcre.so.* /lib/
ln -v -sf ../../lib/libpcre.so.0 /usr/lib/libpcre.so</userinput></screen>

  </sect2>

  <sect2 id="contents-pcre" role="content">
    <title>Contents of PCRE</title>

    <segmentedlist>
      <segtitle>Installed programs</segtitle>
      <segtitle>Installed libraries</segtitle>
      <segtitle>Installed directories</segtitle>

      <seglistitem>
        <seg>pcregrep, pcretest, and pcre-config</seg>
        <seg>libpcre.{a,so}, libpcrecpp.{a,so} and libpcreposix.{a,so}</seg>
        <seg>/usr/share/doc/pcre-&pcre-version;</seg>
      </seglistitem>
    </segmentedlist>

    <variablelist>
      <bridgehead renderas="sect3">Short Descriptions</bridgehead>
      <?dbfo list-presentation="list"?>
      <?dbhtml list-presentation="table"?>

      <varlistentry id="pcregrep">
        <term><command>pcregrep</command></term>
        <listitem>
          <para>A grep that understands Perl compatible regular
          expressions.</para>
          <indexterm zone="ch-system-pcre pcregrep">
            <primary sortas="b-pcre">pcregrep</primary>
          </indexterm>
        </listitem>
      </varlistentry>

      <varlistentry id="pcretest">
        <term><command>pcretest</command></term>
        <listitem>
          <para>Tests a Perl compatible regular expression.</para>
          <indexterm zone="ch-system-pcre pcretest">
            <primary sortas="b-pcretest">pcretest</primary>
          </indexterm>
        </listitem>
      </varlistentry>

      <varlistentry id="pcre-config">
        <term><command>pcre-config</command></term>
        <listitem>
          <para>Used during the compilation process of programs linking to the
          PCRE libraries.</para>
          <indexterm zone="ch-system-pcre pcre-config">
            <primary sortas="b-pcre-config">pcre-config</primary>
          </indexterm>
        </listitem>
      </varlistentry>

      <varlistentry id="libpcre">
        <term><filename class="libraryfile">libpcre</filename></term>
        <listitem>
          <para>Provides functions useful for working with regular
          expressions.</para>
          <indexterm zone="ch-system-pcre libpcre">
            <primary sortas="c-libpcre*">libpcre*</primary>
          </indexterm>
        </listitem>
      </varlistentry>

      <varlistentry id="libpcrecpp">
        <term><filename class="libraryfile">libpcrecpp</filename></term>
        <listitem>
          <para>Provides C++ wrapper functions for the libpcre library.</para>
          <indexterm zone="ch-system-pcre libpcrecpp">
            <primary sortas="c-libpcrecpp*">libpcrecpp*</primary>
          </indexterm>
        </listitem>
      </varlistentry>

      <varlistentry id="libpcreposix">
        <term><filename class="libraryfile">libpcreposix</filename></term>
        <listitem>
          <para>Provides wrapper functions based on the POSIX regular expression
          API.</para>
          <indexterm zone="ch-system-pcre libpcreposix">
            <primary sortas="c-libpcre*">libpcreposix*</primary>
          </indexterm>
        </listitem>
      </varlistentry>

    </variablelist>

  </sect2>

</sect1>