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>Ecosconfig on Windows and Linux Quick Start</TITLE
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>eCos User Guide</TH
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><TD
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><A
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><TD
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>Chapter 11. Configuring and Building <SPAN
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>eCos</SPAN
> from Source</TD
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><DIV
CLASS="SECT1"
><H1
CLASS="SECT1"
><A
NAME="USING-ECOSCONFIG-ON-LINUX">Ecosconfig on Windows and Linux Quick Start</H1
><P
>As an alternative to using the graphical
<SPAN
CLASS="APPLICATION"
>Configuration Tool</SPAN
>, it is still possible to
configure and build a kernel by editing a configuration file manually
and using the <B
CLASS="COMMAND"
>ecosconfig</B
> command. </P
><P
>Manual configuration and the <B
CLASS="COMMAND"
>ecosconfig</B
> command are
described in detail in <A
HREF="manual-configuration.html"
>Chapter 28</A
>.</P
><P
>To use the <B
CLASS="COMMAND"
>ecosconfig</B
> command you need to start a
shell. In Windows you need to start a
<SPAN
CLASS="PRODUCTNAME"
>CygWin</SPAN
> <B
CLASS="COMMAND"
>bash</B
> shell, not a
DOS command line.</P
><P
>The following instructions assume that the
<TT
CLASS="LITERAL"
>PATH</TT
> and <TT
CLASS="LITERAL"
>ECOS_REPOSITORY</TT
>
environment variables have been setup correctly as described in <A
HREF="user-guide-installation-linux.html"
>Chapter 7</A
>. They also assume Linux
usage but equally well apply to Windows running Cygwin.</P
><P
>Before invoking <B
CLASS="COMMAND"
>ecosconfig</B
> you need to
choose a directory in which to work. For the purposes of this tutorial,
the default path will be <TT
CLASS="FILENAME"
><TT
CLASS="REPLACEABLE"
><I
>BASE_DIR</I
></TT
>/ecos-work</TT
>.
Create this directory and change to it by typing: </P
><TABLE
BORDER="5"
BGCOLOR="#E0E0F0"
WIDTH="70%"
><TR
><TD
><PRE
CLASS="PROGRAMLISTING"
>$ mkdir <TT
CLASS="REPLACEABLE"
><I
>BASE_DIR</I
></TT
>/ecos-work
$ cd <TT
CLASS="REPLACEABLE"
><I
>BASE_DIR</I
></TT
>/ecos-work</PRE
></TD
></TR
></TABLE
><P
>To see what options can be used with <B
CLASS="COMMAND"
>ecosconfig</B
>,
type: </P
><TABLE
BORDER="5"
BGCOLOR="#E0E0F0"
WIDTH="70%"
><TR
><TD
><PRE
CLASS="PROGRAMLISTING"
>$ ecosconfig --help</PRE
></TD
></TR
></TABLE
><P
>The available packages, targets and templates may be listed
as follows:</P
><TABLE
BORDER="5"
BGCOLOR="#E0E0F0"
WIDTH="70%"
><TR
><TD
><PRE
CLASS="PROGRAMLISTING"
>$ ecosconfig list</PRE
></TD
></TR
></TABLE
><P
>Here is sample output from <B
CLASS="COMMAND"
>ecosconfig</B
> showing
the usage message.</P
><DIV
CLASS="EXAMPLE"
><A
NAME="AEN683"><P
><B
>Example 11-1. Getting help from ecosconfig</B
></P
><TABLE
BORDER="5"
BGCOLOR="#E0E0F0"
WIDTH="70%"
><TR
><TD
><PRE
CLASS="PROGRAMLISTING"
>$ ecosconfig --help
Usage: ecosconfig [ qualifier ... ] [ command ]
commands are:
list : list repository contents
new TARGET [ TEMPLATE [ VERSION ] ] : create a configuration
target TARGET : change the target hardware
template TEMPLATE [ VERSION ] : change the template
add PACKAGE [ PACKAGE ... ] : add package(s)
remove PACKAGE [ PACKAGE ... ] : remove package(s)
version VERSION PACKAGE [ PACKAGE ... ] : change version of package(s)
export FILE : export minimal config info
import FILE : import additional config info
check : check the configuration
resolve : resolve conflicts
tree : create a build tree
qualifiers are:
--config=FILE : the configuration file
--prefix=DIRECTORY : the install prefix
--srcdir=DIRECTORY : the source repository
--no-resolve : disable conflict
resolution
--version : show version and copyright
$</PRE
></TD
></TR
></TABLE
></DIV
><DIV
CLASS="EXAMPLE"
><A
NAME="AEN686"><P
><B
>Example 11-2. ecosconfig output —
list of available packages, targets and templates</B
></P
><TABLE
BORDER="5"
BGCOLOR="#E0E0F0"
WIDTH="70%"
><TR
><TD
><PRE
CLASS="PROGRAMLISTING"
>$ ecosconfig list
Package CYGPKG_CYGMON (CygMon support via eCos):
aliases: cygmon
versions: <version>
Package CYGPKG_DEVICES_WALLCLOCK_DALLAS_DS1742 (Wallclock driver for Dallas 1742):
aliases: devices_wallclock_ds1742 device_wallclock_ds1742
versions: <version>
Package CYGPKG_DEVICES_WALLCLOCK_SH3 (Wallclock driver for SH3 RTC module):
aliases: devices_wallclock_sh3 device_wallclock_sh3
versions: <version>
Package CYGPKG_DEVICES_WATCHDOG_ARM_AEB (Watchdog driver for ARM/AEB board):
aliases: devices_watchdog_aeb device_watchdog_aeb
versions: <version>
Package CYGPKG_DEVICES_WATCHDOG_ARM_EBSA285 (Watchdog driver for ARM/EBSA285 board):
aliases: devices_watchdog_ebsa285 device_watchdog_ebsa285
versions: <version>
…</PRE
></TD
></TR
></TABLE
></DIV
><DIV
CLASS="SECT2"
><H2
CLASS="SECT2"
><A
NAME="AEN689">Selecting a Target</H2
><P
>To configure for a listed target, type: </P
><TABLE
BORDER="5"
BGCOLOR="#E0E0F0"
WIDTH="70%"
><TR
><TD
><PRE
CLASS="PROGRAMLISTING"
>$ ecosconfig new <target></PRE
></TD
></TR
></TABLE
><P
>For example, to configure for the ARM PID development board,
type: </P
><TABLE
BORDER="5"
BGCOLOR="#E0E0F0"
WIDTH="70%"
><TR
><TD
><PRE
CLASS="PROGRAMLISTING"
>$ ecosconfig new pid</PRE
></TD
></TR
></TABLE
><P
>You can then edit the generated file,
<TT
CLASS="FILENAME"
>ecos.ecc</TT
>, setting the options as required for the
target (endianess, CPU model, Startup type, etc.). For detailed
information about how to edit the <TT
CLASS="FILENAME"
>ecos.ecc</TT
> file,
see the <I
CLASS="CITETITLE"
>CDL Writer's Guide</I
> and <A
HREF="editing-an-ecos-savefile.html"
>the Section called <I
>Editing an <SPAN
CLASS="PRODUCTNAME"
>eCos</SPAN
> Savefile</I
> in Chapter 28</A
>.</P
><P
>Create a build tree for the configured target by typing:</P
><TABLE
BORDER="5"
BGCOLOR="#E0E0F0"
WIDTH="70%"
><TR
><TD
><PRE
CLASS="PROGRAMLISTING"
>$ ecosconfig tree</PRE
></TD
></TR
></TABLE
><P
>If there are any problem with the configuration,
<B
CLASS="COMMAND"
>ecosconfig</B
> will tell you. The most likely cause of
this is mistakes when editing the <TT
CLASS="FILENAME"
>ecos.ecc</TT
> file.
You can check whether the configuration you have made is correct,
without building the tree with the following command:</P
><TABLE
BORDER="5"
BGCOLOR="#E0E0F0"
WIDTH="70%"
><TR
><TD
><PRE
CLASS="PROGRAMLISTING"
>$ ecosconfig check</PRE
></TD
></TR
></TABLE
><P
>If this reports any conflicts you can get
<B
CLASS="COMMAND"
>ecosconfig</B
> to try and resolve them itself by typing:</P
><TABLE
BORDER="5"
BGCOLOR="#E0E0F0"
WIDTH="70%"
><TR
><TD
><PRE
CLASS="PROGRAMLISTING"
>$ ecosconfig resolve</PRE
></TD
></TR
></TABLE
><P
>See <A
HREF="conflicts-and-constraints.html"
>the Section called <I
>Conflicts and constraints</I
> in Chapter 28</A
> for more details.</P
><P
>You can now run the command <B
CLASS="COMMAND"
>make</B
> or <B
CLASS="COMMAND"
>make
tests</B
>, after which you will be at the same point you
would be after running the <SPAN
CLASS="APPLICATION"
>Configuration Tool</SPAN
>
— you can start developing your own applications,
following the steps in <A
HREF="building-and-running-sample-appliations.html"
>Chapter 13</A
>. </P
><P
>The procedure shown above allows you to do very coarse-grained
configuration of the <SPAN
CLASS="PRODUCTNAME"
>eCos</SPAN
> kernel: you can select which packages
to include in your kernel, and give target and start-up options.
But you cannot select components within a package, or set the very
fine-grained options. </P
><P
>To select fine-grained configuration options you will need to
edit the configuration file <TT
CLASS="FILENAME"
>ecos.ecc</TT
> in the
current directory and regenerate the build tree.</P
><DIV
CLASS="CAUTION"
><P
></P
><TABLE
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BORDER="1"
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><TR
><TD
ALIGN="CENTER"
><B
>Caution</B
></TD
></TR
><TR
><TD
ALIGN="LEFT"
><P
>You should follow the manual configuration process described
above very carefully, and you should read the comments in each file
to see when one option depends on other options or packages being
enabled or disabled. If you do not, you might end up with an inconsistently
configured kernel which could fail to build or might execute
incorrectly.</P
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