Re: [docs] [bitbake-devel] [PATCH 3/4] knotty: convert warnings to errors when -W is passed

["Antonin Godard" <antonin.godard@bootlin.com>]

On Thu Oct 15, 2026 at 10:58 AM CEST, Richard Purdie via lists.yoctoproject.org wrote:
> On Tue, 2026-10-13 at 14:13 +0200, Antonin Godard via lists.openembedded.org wrote:
>> When -W is passed, modify the handlers to show warnings in red and set
>> the return value to 1. Add a summary line informing the user that the -W
>> option was used as it might not be obvious when looking at the bottom
>> the end of the console log.
>
> The trouble is this doesn't make warnings behave exactly as errors and
> I think that is going to confuse people :/.
>
> Specifically, if an error is encountered in a task, it will error and
> fail. The warning will show an error but continue anyway. I also
> suspect the warnings will still show as warnings in the log files and
> only appear as errors on the console.

Good point. So there's two directions this could take (if we want that feature):

- Make this option change the behavior of warnings, and make them _act_ (not
  just look) like errors, so a given task would stop in case of warning.

- Rename the option and make it clearer: warnings are still warnings but the
  return code will be 1 if there are any.

  Maybe "-W,--fail-on-warnings: Make bitbake return 1 if any warning is
  emitted"?

I feel like the second option might be best as the first one is changing the
behavior of tasks and I also think this might not be desirable.

With the second option it allows having a positive exit code on warnings while
still being able to have a look at all of them (not only the single one that
stopped the build as would happen with the first option), just as you would with
a normal bitbake execution.

Antonin