[oe] DISTRO override logic in angstrom.inc

[Rod Whitby]

Michael 'Mickey' Lauer wrote:
> On Monday 18 February 2008 22:54:24 Richard Purdie wrote:
>> I'm voting in favour of:
>>
>> DISTRO_OVERRIDES ?= ${DISTRO}
>> OVERRIDES
>> ="local:${MACHINE}:${DISTRO_OVERRIDES}:${TARGET_OS}:${TARGET_ARCH}:build-${
>> BUILD_OS}:fail-fast:pn-${PN}"
>>
>> and then angstrom sets:
>>
>> DISTRO_OVERRIDES = "angstrom"
>>
>> and openmoko sets:
>>
>> DISTRO_OVERRIDES = "openmoko:angstrom"
>>
>> Note there is no longer any use of := and that the main list of
>> overrides is only written in one place rather than spread out per distro
>> which could cause maintenance problems in the future.

Can we do the same for MACHINE at the same time?

nslu2, for instance, needs to use ixp4xx overrides and does the same
thing that openmoko did with angstrom overrides.

-- Rod