source: general/genlib/pcre.xml@ 52d29f7

<?xml version="1.0" encoding="ISO-8859-1"?>
<!DOCTYPE sect1 PUBLIC "-//OASIS//DTD DocBook XML V4.3//EN"
   "http://www.oasis-open.org/docbook/xml/4.3/docbookx.dtd" [
  <!ENTITY % general-entities SYSTEM "../../general.ent">
  %general-entities;

<!ENTITY pcre-download-http " ">
<!ENTITY pcre-download-ftp "ftp://ftp.csx.cam.ac.uk/pub/software/programming/pcre/pcre-&pcre-version;.tar.bz2">
<!ENTITY pcre-size "344 KB">
<!ENTITY pcre-buildsize "3.5 MB">
<!ENTITY pcre-time "0.08 SBU">

]>

<sect1 id="pcre" xreflabel="PCRE-&pcre-version;">
<?dbhtml filename="pcre.html"?>
<title>PCRE-&pcre-version;</title>

<sect2>
<title>Introduction to <application><acronym>PCRE</acronym></application></title>
                                                                                
<para>The <application><acronym>PCRE</acronym></application> package contains
<application>Perl</application> Compatible Regular Expression
libraries. These are useful for implementing regular expression pattern
matching using the same syntax and semantics as
<application>Perl</application> 5.</para>
                                                                                
<sect3><title>Package information</title>
<itemizedlist spacing='compact'>
<listitem><para>Download (HTTP): <ulink
url="&pcre-download-http;"/></para></listitem>
<listitem><para>Download (FTP): <ulink
url="&pcre-download-ftp;"/></para></listitem>
<listitem><para>Download size: &pcre-size;</para></listitem>
<listitem><para>Estimated Disk space required:
&pcre-buildsize;</para></listitem>
<listitem><para>Estimated build time:
&pcre-time;</para></listitem></itemizedlist>
</sect3>
</sect2>

<sect2>
<title>Installation of <application><acronym>PCRE</acronym></application></title>
                                                                                
<para>Install <application><acronym>PCRE</acronym></application> by running the following commands:</para>
                                                                                
<screen><userinput><command>./configure --prefix=/usr --enable-utf8 &amp;&amp;
make &amp;&amp;
make install</command></userinput></screen>
                                                                                
<para>If you reinstall <application>grep</application> after installing <application>pcre</application>,
<application>grep</application> will get linked against <application>pcre</application> and
may cause problems if <filename>/usr</filename> is a separate mount point. To avoid this,
either pass the option <emphasis>--disable-perl-regexp</emphasis> when executing <command>./configure</command>
for <application>grep</application> or move <filename>libpcre</filename> to <filename>/lib</filename>
as follows.</para>
                                                                                
<screen><userinput><command>mv /usr/lib/libpcre.so.* /lib/ &amp;&amp;
ln -sf ../../lib/libpcre.so.0 /usr/lib/libpcre.so</command></userinput></screen>                                                                                
</sect2>
                                                                                
<sect2>
<title>Command explanations</title>
                                                                                
<para><parameter>--enable-utf8</parameter>: This switch includes the
code for handling <acronym>UTF</acronym>-8 character strings in the
library.</para>
                                                                                
</sect2>

<sect2>
<title>Contents</title>
                                                                                
<para>The <application><acronym>PCRE</acronym></application> package contains
the <filename class='libraryfile'>libpcre</filename> libraries,
<command>pcregrep</command>, <command>pcretest</command> and
<command>pcre-config</command>.</para>
                                                                                
</sect2>
                                                                                
<sect2><title>Description</title>
                                                                                
<sect3><title>pcregrep</title>
<para><command>pcregrep</command> is a <command>grep</command> that understands
<application>Perl</application> compatible regular expressions.</para></sect3>
                                                                                
<sect3><title>pcretest</title>
<para><command>pcretest</command> can test your
<application>Perl</application> compatible regular expression.</para></sect3>
                                                                                
<sect3><title>pcre-config</title>
<para><command>pcre-config</command> is used during the compile process of
programs linking to this library.</para></sect3>
                                                                                
</sect2>

</sect1>