[OE-core] populate-sysroot files in sstate cache overwritten by "empty" ones

[Mike Crowe]

On Thu, Jun 13, 2013 at 10:21:47PM +0100, Richard Purdie wrote:
> On Thu, 2013-06-13 at 12:16 +0100, Mike Crowe wrote:
> > The problem seems to be caused by having an ancillary task in recipe1 that
> > depends on do_configure and the same ancillary task in recipe2 that depends
> > on recipe1:populate-sysroot. The result is that recipe1:do_configure runs
> > followed by recipe1:do_populate_sysroot without the intervening important
> > tasks such as do_install.
> 
> Hmm, interesting.
> 
> There is some code in staging.bbclass:
> 
> BB_SETSCENE_VERIFY_FUNCTION = "sysroot_checkhashes"
> 
> where sysroot_checkhashes() is meant to notice that do_configure reruns
> and hence forces do_populate_sysroot to rerun. It appears to do this
> successfully, however its missing out the dependencies of
> do_populate_sysroot (compile, install) which is why the package ends up
> broken.
> 
> I think this is a collision of two sets of data, there are some tasks
> being skipped which shouldn't be. So I'd guess that the values from
> BB_SETSCENE_VERIFY_FUNCTION aren't being processed with respect to
> removing things from the setscene covered list.

Thanks for analysing this.

What is the correct thing to happen in this situation?

Should do_configure be run but not do_populate_sysroot?

Or, should the fact that do_configure needs to be run stop the sstate
solution from being considered valid altogether and force recipe1 to be
compiled, installed and populate_sysroot'ed in the traditional manner?

Thanks.

Mike.