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<?xml version="1.0" encoding="iso-8859-1"?>
<!--
PMake - A Tutorial
$FreeBSD$
-->
<chapter id="intro">
<title>Introduction</title>
<para><application>PMake</application> is a program for creating other
programs, or anything else you can think of for it to do. The basic idea
behind <application>PMake</application> is that, for any given system, be
it a program or a document or whatever, there will be some files that
depend on the state of other files (on when they were last modified).
<application>PMake</application> takes these dependencies, which you must
specify, and uses them to build whatever it is you want it to
build.</para>
<para><application>PMake</application> is almost fully-compatible with
<application>Make</application>, with which you may already be familiar.
<application>PMake</application>'s most important feature is its ability
to run several different jobs at once, making the creation of systems
considerably faster. It also has a great deal more functionality than
<application>Make</application>.</para>
<para>This tutorial is divided into three main sections corresponding to
basic, intermediate and advanced <application>PMake</application> usage.
If you already know <application>Make</application> well, you will only
need to skim <xref linkend="basics"/> (there are some aspects of
<application>PMake</application> that I consider basic to its use that did
not exist in <application>Make</application>).
Things in <xref linkend="shortcuts"/> make life much easier, while those in
<xref linkend="gods"/> are strictly for those who know what they are doing.
<xref linkend="glossary"/> has definitions for the jargon I use and
<xref linkend="answers"/> contains possible solutions to the problems
presented throughout the tutorial.</para>
</chapter>
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