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<HTML
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>Manual Configuration</TITLE
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>eCos User Guide</TH
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><H1
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><A
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NAME="MANUAL-CONFIGURATION">Chapter 28. Manual Configuration</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="manual-configuration.html#DIRECTORY-TREE-STRUCTURE"
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>Directory Tree Structure</A
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></DT
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><DT
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><A
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HREF="creating-build-tree.html"
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>Creating the Build Tree</A
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></DT
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><DT
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><A
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HREF="conflicts-and-constraints.html"
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>Conflicts and constraints</A
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></DT
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><DT
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><A
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HREF="building-the-system.html"
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>Building the System</A
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></DT
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><DT
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>Packages</A
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></DT
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><DT
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><A
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HREF="coarse-grained-configuration.html"
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>Coarse-grained Configuration</A
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></DT
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><DT
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><A
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HREF="fine-grained-configuration.html"
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>Fine-grained Configuration</A
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></DT
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><DT
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><A
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HREF="editing-an-ecos-savefile.html"
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>Editing an <SPAN
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>eCos</SPAN
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> Savefile</A
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></DT
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><DT
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><A
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HREF="editing-the-sources.html"
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>Editing the Sources</A
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></DT
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><DT
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><A
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HREF="modifying-the-memory-layout.html"
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>Modifying the Memory Layout</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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><SPAN
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CLASS="PRODUCTNAME"
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>eCos</SPAN
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> developers will generally use the graphical
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      Configuration Tool for configuring an <SPAN
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CLASS="PRODUCTNAME"
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>eCos</SPAN
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> system and building
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      the target library. However, some user prefer to use command
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      line tools. These command line tools can also be used for batch
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      operations on all platforms, for example as part of a nightly
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      rebuild and testing procedure.
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    </P
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><P
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>In the current release of the system the command line tools
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      do not provide exactly the same functionality as the graphical
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      tool. Most importantly, there is no facility to resolve
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      configuration conflicts interactively.</P
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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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> configuration system, both graphical and command
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      line tools, are under constant development and enhancement.
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      Developers should note that the procedures described may change
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      considerably in future releases. </P
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><DIV
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CLASS="SECT1"
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><H1
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NAME="DIRECTORY-TREE-STRUCTURE">Directory Tree Structure</H1
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>When building <SPAN
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>eCos</SPAN
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> there are three main directory trees to
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        consider: the source tree, the build tree, and the install
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        tree.</P
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><P
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>The source tree, also known as the component repository,
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          is read-only. It is possible to use a single component
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          repository for any number of different configurations, and
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          it is also possible to share a component repository between
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          multiple users by putting it on a network drive.</P
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><P
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>The build tree contains everything that is specific to a
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          particular configuration, including header and other files
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          that contain configuration data, and the object files that
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          result from compiling the system sources for this
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          configuration. </P
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>The install tree is usually located in the <TT
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CLASS="FILENAME"
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>install</TT
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> subdirectory
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of the build tree. Once an <SPAN
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CLASS="PRODUCTNAME"
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>eCos</SPAN
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> system has been built, the install
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tree contains all the files needed for application development including
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the header files and the target library. By making copies of the
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install tree after a build it is possible to separate application
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development and system configuration, which may be desirable for
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some organizations. </P
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