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<!-- Copyright (C) 2003 Red Hat, Inc.                                -->
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<HTML
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><HEAD
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><TITLE
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>The Component Repository and Working Directories</TITLE
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<META
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NAME="GENERATOR"
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CONTENT="Modular DocBook HTML Stylesheet Version 1.76b+
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"><LINK
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REL="HOME"
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TITLE="eCos User Guide"
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REL="UP"
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TITLE="eCos Programming Concepts and Techniques"
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REL="PREVIOUS"
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TITLE="Templates"
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TITLE="Build Tree"
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><BODY
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><DIV
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SUMMARY="Header navigation table"
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><TR
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><TH
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COLSPAN="3"
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>eCos User Guide</TH
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></TR
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><TR
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><TD
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WIDTH="10%"
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ALIGN="left"
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VALIGN="bottom"
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><A
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HREF="cdl-templates.html"
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>Prev</A
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VALIGN="bottom"
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HREF="build-tree.html"
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>Next</A
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><HR
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ALIGN="LEFT"
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WIDTH="100%"></DIV
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><DIV
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CLASS="CHAPTER"
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><H1
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><A
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NAME="COMPONENT-REPO-AND-WORKING-DIRS">Chapter 25. The Component Repository and Working Directories</H1
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><DIV
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CLASS="TOC"
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><DL
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><DT
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><B
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>Table of Contents</B
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></DT
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><DT
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><A
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HREF="component-repo-and-working-dirs.html#COMPONENT-REPO"
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>Component Repository</A
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></DT
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><DT
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><A
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HREF="build-tree.html"
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>Build Tree</A
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></DT
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><DT
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><A
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HREF="install-tree.html"
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>Install Tree</A
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></DT
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><DT
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><A
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HREF="repository-app-build-tree.html"
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>Application Build Tree</A
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></DT
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></DL
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></DIV
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><P
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>Each of the file trees involved in <SPAN
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CLASS="PRODUCTNAME"
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>eCos</SPAN
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> development has a
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        different role. </P
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><DIV
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CLASS="SECT1"
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><H1
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CLASS="SECT1"
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><A
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NAME="COMPONENT-REPO">Component Repository</H1
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><P
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>The <SPAN
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CLASS="PRODUCTNAME"
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>eCos</SPAN
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> <I
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CLASS="FIRSTTERM"
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>component repository</I
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>
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          contains directories for all the packages that are shipped
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          with <SPAN
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CLASS="PRODUCTNAME"
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>eCos</SPAN
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> or provided by third parties.</P
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><P
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>The component repository should not be modified as part of
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application development. </P
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><DIV
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CLASS="FIGURE"
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><A
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NAME="AEN2022"><P
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><B
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>Figure 25-1. Component repository</B
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></P
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><P
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><IMG
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SRC="pix/comprepos.png"></P
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></DIV
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><DIV
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CLASS="SECT2"
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><H2
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CLASS="SECT2"
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><A
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NAME="AEN2025">Purpose</H2
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><P
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>The component repository is the master copy of source code
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for all system and third party components. It also contains some
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files needed to administer and build the system, such as <B
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CLASS="COMMAND"
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>ecosadmin.tcl</B
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>.</P
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></DIV
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><DIV
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CLASS="SECT2"
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><H2
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CLASS="SECT2"
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><A
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NAME="AEN2029">How is it modified?</H2
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><P
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>You modify it by importing new versions of packages from a
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distribution or removing existing packages. These activities are
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undertaken using the <SPAN
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CLASS="PRODUCTNAME"
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>eCos</SPAN
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> <SPAN
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CLASS="APPLICATION"
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>Package Administration Tool</SPAN
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>.</P
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></DIV
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><DIV
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CLASS="SECT2"
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><H2
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CLASS="SECT2"
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><A
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NAME="AEN2034">When is it edited manually?</H2
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><P
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>Files in the component repository should only be edited manually
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as determined by the component maintainer.</P
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></DIV
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><DIV
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CLASS="SECT2"
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><H2
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CLASS="SECT2"
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><A
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NAME="AEN2037">User Applications</H2
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><P
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>User application source code should <SPAN
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CLASS="emphasis"
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><I
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CLASS="EMPHASIS"
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>not</I
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></SPAN
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> go
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into the component repository.</P
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></DIV
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><DIV
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CLASS="SECT2"
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><H2
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CLASS="SECT2"
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><A
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NAME="AEN2041">Examples of files in this hierarchy:</H2
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><P
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></P
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><DIV
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CLASS="VARIABLELIST"
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><DL
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><DT
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><TT
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CLASS="FILENAME"
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><TT
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CLASS="REPLACEABLE"
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><I
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>BASE_DIR</I
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></TT
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>/doc/ref/ecos-ref.html</TT
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></DT
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><DD
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><P
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>The top level HTML file for the
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                  <I
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CLASS="CITETITLE"
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><SPAN
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CLASS="PRODUCTNAME"
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>eCos</SPAN
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> Reference
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                    Manual</I
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>. </P
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></DD
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><DT
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><TT
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CLASS="FILENAME"
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><TT
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CLASS="REPLACEABLE"
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><I
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>BASE_DIR</I
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></TT
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>/prebuilt/pid/tests/kernel/<TT
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CLASS="REPLACEABLE"
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><I
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>&#60;version&#62;</I
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></TT
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>/tests/thread_gdb.exe</TT
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></DT
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><DD
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><P
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></P
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></DD
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><DT
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><TT
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CLASS="FILENAME"
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><TT
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CLASS="REPLACEABLE"
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><I
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>BASE_DIR</I
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></TT
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>/prebuilt/linux/tests/kernel/<TT
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CLASS="REPLACEABLE"
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><I
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>&#60;version&#62;</I
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></TT
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>/tests/thread_gdb.exe</TT
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></DT
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><DD
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><P
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>Pre-built tests for the supported platforms, and
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                  the synthetic Linux target.</P
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></DD
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><DT
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><TT
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CLASS="FILENAME"
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><TT
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CLASS="REPLACEABLE"
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><I
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>BASE_DIR</I
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></TT
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>/examples/twothreads.c</TT
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></DT
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><DD
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><P
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>One of the example programs.</P
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></DD
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><DT
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><TT
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CLASS="FILENAME"
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><TT
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CLASS="REPLACEABLE"
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><I
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>BASE_DIR</I
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></TT
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>/ecosadmin.tcl</TT
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></DT
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><DD
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><P
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>The Tcl program which is used to  import new versions of packages
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from a distribution or remove existing packages.</P
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></DD
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><DT
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><TT
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CLASS="FILENAME"
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><TT
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CLASS="REPLACEABLE"
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><I
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>BASE_DIR</I
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></TT
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>/packages/language/c/libm/<TT
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CLASS="REPLACEABLE"
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><I
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>&#60;version&#62;</I
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></TT
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>/src/double/portable-api/s_tanh.c</TT
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></DT
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><DD
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><P
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>Implementation of the hyperbolic tangent function in the standard
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math library.</P
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></DD
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><DT
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><TT
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CLASS="FILENAME"
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><TT
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CLASS="REPLACEABLE"
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><I
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>BASE_DIR</I
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></TT
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>/pkgconf/rules.mak</TT
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></DT
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><DD
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><P
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>A file with <B
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CLASS="COMMAND"
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>make</B
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> rules, used
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by the <TT
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CLASS="FILENAME"
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>makefile</TT
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>.</P
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>Prev</A
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