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<!-- Copyright (C) 2003 Red Hat, Inc. --> <!-- This material may be distributed only subject to the terms --> <!-- and conditions set forth in the Open Publication License, v1.0 --> <!-- or later (the latest version is presently available at --> <!-- http://www.opencontent.org/openpub/). --> <!-- Distribution of the work or derivative of the work in any --> <!-- standard (paper) book form is prohibited unless prior --> <!-- permission is obtained from the copyright holder. --> <HTML ><HEAD ><TITLE >Packages</TITLE ><meta name="MSSmartTagsPreventParsing" content="TRUE"> <META NAME="GENERATOR" CONTENT="Modular DocBook HTML Stylesheet Version 1.76b+ "><LINK REL="HOME" TITLE="eCos User Guide" HREF="ecos-user-guide.html"><LINK REL="UP" TITLE="CDL Concepts" HREF="cdl-concepts.html"><LINK REL="PREVIOUS" TITLE="Component Definition Language" HREF="cdl-component-definition-language.html"><LINK REL="NEXT" TITLE="Configuration Items" HREF="cdl-configuration-items.html"></HEAD ><BODY CLASS="SECT1" BGCOLOR="#FFFFFF" TEXT="#000000" LINK="#0000FF" VLINK="#840084" ALINK="#0000FF" ><DIV CLASS="NAVHEADER" ><TABLE SUMMARY="Header navigation table" WIDTH="100%" BORDER="0" CELLPADDING="0" CELLSPACING="0" ><TR ><TH COLSPAN="3" ALIGN="center" >eCos User Guide</TH ></TR ><TR ><TD WIDTH="10%" ALIGN="left" VALIGN="bottom" ><A HREF="cdl-component-definition-language.html" ACCESSKEY="P" >Prev</A ></TD ><TD WIDTH="80%" ALIGN="center" VALIGN="bottom" >Chapter 24. CDL Concepts</TD ><TD WIDTH="10%" ALIGN="right" VALIGN="bottom" ><A HREF="cdl-configuration-items.html" ACCESSKEY="N" >Next</A ></TD ></TR ></TABLE ><HR ALIGN="LEFT" WIDTH="100%"></DIV ><DIV CLASS="SECT1" ><H1 CLASS="SECT1" ><A NAME="CDL-PACKAGES">Packages</H1 ><P >The building blocks of an <SPAN CLASS="PRODUCTNAME" >eCos</SPAN > configuration are called <SPAN CLASS="emphasis" ><I CLASS="EMPHASIS" >packages</I ></SPAN >. Packages are the units of software distribution. A set of core packages (such as kernel, C library and math library) is provided by Red Hat: additional third-party packages will be available in future.</P ><P >A package may exist in one of a number of <SPAN CLASS="emphasis" ><I CLASS="EMPHASIS" >versions</I ></SPAN >. The default version is the <SPAN CLASS="emphasis" ><I CLASS="EMPHASIS" >current</I ></SPAN > version. Only one version of a given package may be present in the component repository at any given time.</P ><P >Packages are organized in a tree hierarchy. Each package is either at the top-level or is the child of another package.</P ><P >The <SPAN CLASS="PRODUCTNAME" >eCos</SPAN > <SPAN CLASS="APPLICATION" > Package Administration Tool</SPAN > can be used to add or remove packages from the component repository. The <SPAN CLASS="PRODUCTNAME" >eCos</SPAN > <SPAN CLASS="APPLICATION" >Configuration Tool</SPAN > can be used to include or exclude packages from the configuration being built.</P ></DIV ><DIV CLASS="NAVFOOTER" ><HR ALIGN="LEFT" WIDTH="100%"><TABLE SUMMARY="Footer navigation table" WIDTH="100%" BORDER="0" CELLPADDING="0" CELLSPACING="0" ><TR ><TD WIDTH="33%" ALIGN="left" VALIGN="top" ><A HREF="cdl-component-definition-language.html" ACCESSKEY="P" >Prev</A ></TD ><TD WIDTH="34%" ALIGN="center" VALIGN="top" ><A HREF="ecos-user-guide.html" ACCESSKEY="H" >Home</A ></TD ><TD WIDTH="33%" ALIGN="right" VALIGN="top" ><A HREF="cdl-configuration-items.html" ACCESSKEY="N" >Next</A ></TD ></TR ><TR ><TD WIDTH="33%" ALIGN="left" VALIGN="top" >Component Definition Language</TD ><TD WIDTH="34%" ALIGN="center" VALIGN="top" ><A HREF="cdl-concepts.html" ACCESSKEY="U" >Up</A ></TD ><TD WIDTH="33%" ALIGN="right" VALIGN="top" >Configuration Items</TD ></TR ></TABLE ></DIV ></BODY ></HTML >
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