[Draft] From Bitbake Hello World To an Image

[Draft] From Bitbake Hello World To an Image

[Eren Türkay]

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Hello,

I have completed a document that tries to explain how image is created
using openembedded starting from bitbake fundementals. The document
reflects my own understanding and includes the information that I wished
to have when I first involved in understanding openembedded.

This is aimed for people who want get the big picture with some details
under the hood (What's the sequence of creating an image, how is source
fetched, patched, configured, and installed? How is ipk, rpm, and deb
created? How is image produced?)

People who know bitbake can skip to "Understanding OpenEmbedded" part.
However, I suggest them to play with plain bitbake and read the first
chapter as bitbake is the hearth of OpenEmbedded.

There are additional information required which are marked with "FIXME"
keywords. Suggestions and contributions are welcomed.

I don't know how it can be integrated to current documentation but I
would like to help if that's the case. The licence of the work is CC
BY-SA. Use it, change it, adapt it, distribute it, as long as you
attribute the original work and the author :)

Document:
http://hambedded.org/blog/2012/11/24/from-bitbake-hello-world-to-an-image/

Markdown source:
https://github.com/hambedded-linux/hambedded-linux.github.com/tree/source/source/_posts

Regards,
Eren

-- 
    . 73! DE TA1AET
      http://erenturkay.com/

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Re: [Draft] From Bitbake Hello World To an Image

[Trevor Woerner]

Thank you, I enjoyed reading your document. I especially liked the top
part which talked about creating your own tasks (which 'turned the
light on' for how OE/Yocto use bitbake). I also wasn't aware of the
vim helpers which come as part of bitbake.

Re: [Draft] From Bitbake Hello World To an Image

[Trevor Woerner]

I'm not sure if there's something about my system that is different
than what you expect, but I had to delete my 'tmp' folder before
invoking './bin/bitbake firstrecipe -vDD' after inheriting the
"autotool" versions in order to get the new, overridden tasks to run
(since there's no 'clean' tasks).

Re: [Draft] From Bitbake Hello World To an Image

[Eren Türkay]

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On Thu, Dec 13, 2012 at 05:26:29PM -0500, Trevor Woerner wrote:
> I'm not sure if there's something about my system that is different
> than what you expect, but I had to delete my 'tmp' folder before
> invoking './bin/bitbake firstrecipe -vDD' after inheriting the
> "autotool" versions in order to get the new, overridden tasks to run
> (since there's no 'clean' tasks).

Thank you for your feedback. I am glad you like it.

You are right that 'tmp' directory needs to be removed after changing
the recipe (adding inherit, or removing it). I guess we are hitting
bitbake cache. Since clean tasks don't exist, 'tmp' needs to be removed
to make changes take effect.

I must have removed 'tmp' and missed adding it while writing. I will add
the explanation.

Regards,
Eren

-- 
    . 73! DE TA1AET
      http://linkedin.com/in/erenturkay

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