source: general/genlib/pcre.xml@ cf7ac622

<?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-md5 "813850808894d99fb5b1c41ec6335d4f">
<!ENTITY pcre-size "460 KB">
<!ENTITY pcre-buildsize "3.5 MB">
<!ENTITY pcre-time "0.08 SBU">
]>

<sect1 id="pcre" xreflabel="PCRE-&pcre-version;">
<sect1info>
<othername>$LastChangedBy$</othername>
<date>$Date$</date>
</sect1info>
<?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 MD5 Sum: &pcre-md5;</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>