[yocto] Question / issue

[Bruce Ashfield]

On 14-05-12 01:56 AM, Paul McGougan wrote:
> From: Bruce Ashfield [mailto:bruce.ashfield at windriver.com]
>
>>> Secondly, (and this is our main issue) I have found that by adding the
>>> do_install_append function, even if it is completely empty, whenever I
>>> try to bitbake anything that depends on the kernel, that bitbake always
>>> re-runs the kernel install stage, even when there have been no changes.
>>> Literally I can run a bitbake, then run the same bitbake command again,
>>> and both times the kernel install stage gets run (this is a problem
>>> because it takes a long time to run). It appears to be happening because
>>> the stampfile is not found every time (the hash appears to be wrong).
>>> Is this a bug? Is there a fix or work-around for this problem?
>
>> In this front, I'm not the best reference. Checking the sstate signature
>> might help, it should show which variables are being used .. and possibly
>> invalidating the signature, triggering the steps to run again.
>
> Thanks Bruce.
>
> Just for reference of anyone else who runs into a similar issue our issue was:
> 1. The do_install_append function was not *really* empty, the content of it
> was commented out.
> 2. The dependency parser when parsing recipes not only looks for content
> changes, but for also for changes to the values of referenced variables, and
> unfortunately it still performs variable-value substitution in commented-out
> code. In our case, we had the variable $DATETIME in there (but commented
> out), this caused the dependency checker to substitute in the current value for
> DATETIME which of course changed on each run.

Aha. That's what I thought it might be (and what I've been hit by
before in the past), sstate signature checking showed the variable
in these other cases .. so I thought I'd suggest it.

Glad to hear you have a working solution.

Cheers,

Bruce

>
> The fix was to add:
> do_install[vardepsexclude] += "DATETIME"
>
> Regards,
> Paul McGougan
>
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