[bitbake-devel] is there a bitbake equivalent to "touch"ing a file for gnu make?

[Robert P. J. Day]

On Tue, 25 Feb 2020, Andre McCurdy wrote:

> On Tue, Feb 25, 2020 at 1:22 PM <rpjday at crashcourse.ca> wrote:
> >
> >    colleague emails me the following puzzler … current project based on
> > wind river linux 9 (so effectively morty 2.2), so it has bitbake 1.32.
> > apparently, for a specific recipe, there are intermittent build errors
> > which she suspects are caused by a race condition in the build of that
> > recipe.
> >
> >    *but* that build error only occurs when something about the underlying
> > layers have changed; as in, someone checked *something* in somewhere
> > forcing at least something to be rebuilt, and that error does not
> > even occur on *all* rebuilds, just some of them. so the question is,
> > which underlying recipe change and rebuild could be triggering this?
> >
> >    she *suspects* it might be openssl, as their project is making
> > regular changes to openssl, and that recipe seems to be an ultimate
> > dependency for quite a number of recipes, so she's just guessing
> > that might be the cause.
> >
> >    in order to test this, she is currently running through a loop
> > wherein, in order to kick off at least some recipe rebuilds, she
> > makes some innocuous change to openssl, causing it to be rebuilt,
> > which then rebuilds all recipes that depend on it and so on.
> >
> >    yuck.
> >
> >    on the other hand, i couldn't immediately suggest anything
> > cleaner. my thought was to (somehow) fake a rebuild of openssl
> > (perhaps by invalidating some timestamp), but that's not going
> > to work as once it's rebuilt, it's just going to look like it
> > did before, so nothing else will be rebuilt.
>
> Not sure what you mean by "fake" a rebuild. You can force a rebuild
> by e.g. manually changing something in the recipe such as PR,
> running "bitbake -c cleansstate openssl", ...

  are you sure about that? i can test this when i get home, but i
thought just cleaning the sstate would not force rebuilds of the rest
of those recipes, just that one.

rday