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From: Richard Purdie <richard.purdie@linuxfoundation.org>
To: "Burton, Ross" <ross.burton@intel.com>
Date: Wed, 22 Mar 2017 16:32:01 +0000
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Subject: Re: design question: should layer.conf contain "PREFERRED_VERSION" settings?
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On Wed, 2017-03-22 at 15:44 +0000, Burton, Ross wrote:
> 
> On 22 March 2017 at 14:59, Richard Purdie <richard.purdie@linuxfounda
> tion.org> wrote:
> > What should happen is that the openstack recipe should complain
> > loudly
> > (error) if anyone tried to build it (or parse it?) with anything
> > except
> > the versions its known to work with.
> > 
> Is this a good time to bring up versions in DEPENDS?

Yes. I'd swear there was a bug for this but I can't find it. I know we
made versions able to be added to DEPENDS without parse failures, its
just a question of getting bitbake to parse them.

> It would be awesome to automatically set PREFERRED_VERSION as
> appropriate depending on the constrains in DEPENDS, but I'd be really
> happy with errors if the versions specified were not selected.
> 
> So in this case openstack could do DEPENDS=python-something (>4.0)
> and bitbake would error out if python-something v3 is being built.

I don't think setting PREFERRED_VERSION magically would be good but I
do like the rest of the idea, its always been the intent really...

Someone needs to file a bug...

Cheers,

Richard