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Bootlin embedded Linux and kernel training materials
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bitbake getvar #218

Closed cperrysfl closed 8 months ago

cperrysfl commented 9 months ago

Hello,

There seems to be a problem with the "Debugging recipes" slide of the yocto-recipe-advanced.tex series of slides. The output of the command looks to be from bitbake-getvar -r ninvaders DEPENDS but the command entered is bitbake -e ninvaders which prints a different output.

I also found that there is no formal introduction to bitbake-getvar so I added one and moved this snippet of code sooner in the training.

Let me know if this seems OK to you.

Thank you, Charles

lucaceresoli commented 9 months ago

See also #216

alexandrebelloni commented 9 months ago

I can assure the output is an excerpt from bitbake -e which indeed ends up being the same as bitbake-getvar. I usually introduce bitbake-getvar at that time or a bit earlier

cperrysfl commented 9 months ago

Hello!

I've run the command again and looked a bit more carefully: The output of bitbake-getvar -r ninvaders DEPENDS is indeed a subset of bitbake -e ninvaders. The -e option seem to print every variables (with assignation history) for a given target, as well as all the tasks and shell/python functions.

I never realized the assignation history was in bitbake -e as I'm always grepping the very large output it gives.

lucaceresoli commented 8 months ago

I have added bitbake-getvars in a different way. Thanks for your proposal @cperrysfl !