[OE-core] sstate hash equivalence breaks rm_work

[Tom Rini]

On Sun, Mar 03, 2019 at 03:21:12PM -0600, Joshua Watt wrote:
> On Sun, Mar 3, 2019, 2:47 PM Tom Rini <trini at konsulko.com> wrote:
> 
> > Hey all,
> >
> > As part of the packagegroup-core-base-utils series I noticed that
> > with rm_work enabled like I usually have, every build was starting over
> > with rebuilding linux-libc-headers and going down from there.  I
> > finished bisecting this now and it comes down to:
> 
> Just for reference, are you trying to use hash equivalence? It sounds like
> not, but I would like to make sure.

I am not.

> Also, it there an AB build that uses rm_work that would have seen this?

OK, so I see I forgot a step that was clear to me, but, uh, not in the
email.  What breaks is for example:
bitbake core-image-minimal && bitbake core-image-minimal
That second build, rather than see "nothing to do" (or at least, almost
nothing to do) says "Oh, I need to build linux-libc-headers from
scratch" and possibly other stuff too, but that's the first thing I
notice.

-- 
Tom
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