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NAME="MANUAL-CONFIGURATION">Chapter 28. Manual Configuration</H1
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>Table of Contents</B
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>Directory Tree Structure</A
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>Creating the Build Tree</A
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>Conflicts and constraints</A
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>Building the System</A
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>Packages</A
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>Coarse-grained Configuration</A
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>Fine-grained Configuration</A
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>Editing an <SPAN
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><P
><SPAN
CLASS="PRODUCTNAME"
>eCos</SPAN
> developers will generally use the graphical
Configuration Tool for configuring an <SPAN
CLASS="PRODUCTNAME"
>eCos</SPAN
> system and building
the target library. However, some user prefer to use command
line tools. These command line tools can also be used for batch
operations on all platforms, for example as part of a nightly
rebuild and testing procedure.
</P
><P
>In the current release of the system the command line tools
do not provide exactly the same functionality as the graphical
tool. Most importantly, there is no facility to resolve
configuration conflicts interactively.</P
><P
>The <SPAN
CLASS="PRODUCTNAME"
>eCos</SPAN
> configuration system, both graphical and command
line tools, are under constant development and enhancement.
Developers should note that the procedures described may change
considerably in future releases. </P
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><A
NAME="DIRECTORY-TREE-STRUCTURE">Directory Tree Structure</H1
><P
>When building <SPAN
CLASS="PRODUCTNAME"
>eCos</SPAN
> there are three main directory trees to
consider: the source tree, the build tree, and the install
tree.</P
><P
>The source tree, also known as the component repository,
is read-only. It is possible to use a single component
repository for any number of different configurations, and
it is also possible to share a component repository between
multiple users by putting it on a network drive.</P
><P
>The build tree contains everything that is specific to a
particular configuration, including header and other files
that contain configuration data, and the object files that
result from compiling the system sources for this
configuration. </P
><P
>The install tree is usually located in the <TT
CLASS="FILENAME"
>install</TT
> subdirectory
of the build tree. Once an <SPAN
CLASS="PRODUCTNAME"
>eCos</SPAN
> system has been built, the install
tree contains all the files needed for application development including
the header files and the target library. By making copies of the
install tree after a build it is possible to separate application
development and system configuration, which may be desirable for
some organizations. </P
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