[ELDK] ELDK and xenomai (beginners question)

[Wolfgang Denk]

Dear Matthias,

In message <CAMj341NgLbuVdg0E+pyN9TOEQS4-dyRH+9heB1a3fYRQsNjojQ at mail.gmail.com> you wrote:
>
> I have some experience with yocto/poky and wanted to take a look on the denx
> eldk. As far as I understood it is some kind of yocto layer. But I don't

This is basically correct - one of the main purposes of the ELDK is to
allow a very quick start without the need to set up a specific MACHINE
configuration and to build everything (root file system and SDK) from
scratch.  Instead, we provide be-built binaries for generic configu-
rations while still maintaining the capability to create board
specific configurations.

> get the meaning of the xenomai related target configurations (e.g. minimal-
> xenomai). Are they just examples for working rootfs? If so, what is the

Yes, correct.  Like all the other root file system images, these are
ready-to-use, working examples that can either be used for general
prototyping tasks, or as a starting point for project specific setups.

> workflow to build  the corresponding kernel and u-boot? Or do I understand
> something totally wrong?

During development, the workflow is the very same as you've been using
all the time before yocto: you use the tools of the respective SDK
image to build U-Boot and Linux.  The source trees used for the ELDK
distribution get installed as part of the SDK images; in the Xenomai
case (installation with "-s xenomai-qte" option) you will find the
following subdirectories under
/opt/eldk-5.4/<arch>/sysroots/<arch>-linux-gnueabi/usr/src:

	kernel-ipipe	- I-Pipe patched kernel source tree
	xenomai		- Xenomai source tree


Best regards,

Wolfgang Denk

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DENX Software Engineering GmbH,     MD: Wolfgang Denk & Detlev Zundel
HRB 165235 Munich, Office: Kirchenstr.5, D-82194 Groebenzell, Germany
Phone: (+49)-8142-66989-10 Fax: (+49)-8142-66989-80 Email: wd at denx.de
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        which, being taught, return to plague the inventor..."