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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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>i386/Linux Synthetic Target Setup</TITLE
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<META
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NAME="GENERATOR"
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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="Target Setup"
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HREF="appendix-target-setup.html"><LINK
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REL="PREVIOUS"
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TITLE="i386 PC Hardware Setup"
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TITLE="Real-time characterization"
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><TR
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><TH
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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="setup-i386-pc.html"
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ACCESSKEY="P"
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>Prev</A
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></TD
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><TD
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WIDTH="80%"
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ALIGN="center"
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VALIGN="bottom"
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>Appendix A. Target Setup</TD
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><TD
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WIDTH="10%"
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ALIGN="right"
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VALIGN="bottom"
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><A
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HREF="real-time-characterization.html"
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>Next</A
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WIDTH="100%"></DIV
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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="SETUP-SYNTH-I386LINUX">i386/Linux Synthetic Target Setup</H1
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><P
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>When building for the synthetic Linux target, the resulting
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binaries are native Linux applications with the HAL providing suitable
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bindings between the eCos kernel and the Linux kernel.</P
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><DIV
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CLASS="NOTE"
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><BLOCKQUOTE
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CLASS="NOTE"
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><P
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><B
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>Note: </B
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>Please be aware that the current implementation of the Linux
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synthetic target does not allow thread-aware debugging.</P
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></BLOCKQUOTE
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></DIV
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><P
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>These Linux applications cannot be run on a Windows system.
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However, it is possible to write a similar HAL emulation for the
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Windows kernel if such a testing target is desired.</P
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><DIV
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CLASS="SECT2"
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><H2
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><A
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NAME="AEN4471">Tools</H2
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><P
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>For the synthetic target, eCos relies on features not available
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in native compilers earlier than gcc-2.95.1. It also requires version
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2.9.5 or later of the GNU linker. If you have gcc-2.95.1 or later
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and ld version 2.9.5 or later, then you do not need to build new
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tools. eCos does not support earlier versions. You can check the compiler
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version using <B
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CLASS="COMMAND"
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>gcc -v</B
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>
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and the linker version using <B
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CLASS="COMMAND"
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>ld
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-v</B
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>.</P
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><P
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>If you have native tools that are sufficiently recent for
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use with eCos, you should be aware that by default eCos assumes
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that the tools <B
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CLASS="COMMAND"
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>i686-pc-linux-gnu-gcc</B
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>, <B
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CLASS="COMMAND"
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>i686-pc-linux-gnu-ar</B
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>,
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 <B
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CLASS="COMMAND"
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>i686-pc-linux-gnu-ld</B
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>, and <B
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CLASS="COMMAND"
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>i686-pc-linux-gnu-objcopy</B
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> are
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on your system and are the correct versions for use with eCos. But
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instead, you can tell eCos to use your native tools by editing the
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configuration value "Global command prefix" (CYGBLD_GLOBAL_COMMAND_PREFIX)
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in your eCos configuration. If left empty (i.e. set to the empty
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string) eCos will use your native tools when building.</P
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><P
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>If you have any difficulties, it is almost certainly easiest
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overall to rebuild the tools as described on: <A
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HREF="http://sources.redhat.com/ecos/getstart.html"
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TARGET="_top"
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>http://sources.redhat.com/ecos/getstart.html</A
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></P
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HREF="setup-i386-pc.html"
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>Prev</A
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></TD
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><TD
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ALIGN="center"
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><A
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HREF="ecos-user-guide.html"
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>Home</A
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><A
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HREF="real-time-characterization.html"
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>Next</A
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></TD
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></TR
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><TR
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><TD
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WIDTH="33%"
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ALIGN="left"
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>i386 PC Hardware Setup</TD
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><TD
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WIDTH="34%"
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ALIGN="center"
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VALIGN="top"
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><A
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HREF="appendix-target-setup.html"
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ACCESSKEY="U"
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>Up</A
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></TD
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><TD
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WIDTH="33%"
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ALIGN="right"
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VALIGN="top"
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>Real-time characterization</TD
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></TR
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></TABLE
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></BODY
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