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