[OE-core] [PATCH 1/7] allarch: Always inhibit default dependencies and set empty TARGET_PREFIX

[Martin Jansa]

On Mon, Nov 18, 2013 at 12:31:15PM +0000, Richard Purdie wrote:
> On Sun, 2013-11-17 at 14:52 +0100, Martin Jansa wrote:
> > * typical case where we inherit allarch and override PACKAGE_ARCH
> >   are packagegroup recipes, but those need default dependencies
> >   inhibited even when they are MACHINE_ARCH or TUNE_PKGARCH.
> >   I don't know about any recipe which inherits allarch and needs
> >   default dependencies.
> 
> The code there was added to allow the allarch class to be enabled or
> disabled. I don't remember exactly why we needed to do that however it
> was added for a reason and making part of it unconditional again will
> probably break whyever we made it optional :(.

I think that use case was MACHINE_ARCH packagegroups loosing -gnueabi
suffix, so that everything except packagegroups (or other MACHINE_ARCH
allarch recipes) was built in workdir:
MACHINE-oe-linux-gnueabi
and packagegroups in
MACHINE-oe-linux

I don't think we had the use case where we needed to conditionally keep
default deps (but of course my memory isn't perfect and I can be wrong).
 
> I can understand how you came to this conclusion though. Which cases is
> this causing problems for?
> 
> > * set empty TARGET_PREFIX
> >   This has a bit weird reason caused by unsupported setup where
> >   external-toolchain is used in some DISTRO only for some MACHINEs
> >   and internal is used for other MACHINEs.
> >   Because external-toolchain usually comes with different TARGET_PREFIX
> >   it was causing allarch recipes to have different signatures even
> >   when they don't use toolchain at all.
> >   Empty TARGET_PREFIX also helps to find allarch recipes which still
> >   have default dependency on e.g. virtual/${TARGET_PREFIX}gcc.
> 
> This seems ok, I'd have taken it if it was a separate patch.

It's related to above, because "thanks" to empty TARGET_PREFIX I've
found few MACHINE_ARCH+allarch recipes in meta-webos which weren't using
toolchain, but default deps had nonexistent "virtual/gcc".

So we cannot merge TARGET_PREFIX without the above part.

-- 
Martin 'JaMa' Jansa     jabber: Martin.Jansa at gmail.com
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