[oe] [RFC] Bring PREFERRED_LIBC to all distros

[Mike (mwester)]

Acked-by: Mike Westerhof <mwester at dls.net>

(Tested fine for the SlugOS distro)

Tom Rini wrote:
> On Mon, Apr 27, 2009 at 07:19:43AM -0700, Tom Rini wrote:
> 
>> Hey all.  I've created a new branch, trini/add-libc-overrides which does
>> the following:
>> - Make every distro declare PREFERRED_LIBC, either outright or
>>   overridable.
>> - For Angstrom/foonas have DISTROVAR ?= ${PREFERRED_LIBC},
>>   PREFERRED_LIBC ?= default
>> - Add conf/distro/include/{eglibc,glibc,uclibc}.inc that have:
>>   - Add 'glibc' to OVERRIDES for eglibc/glibc and 'uclibc' for
>>     uclibc.inc
>>   - Default providers.
>>   NOTE: ${TARGET_PREFIX} includes ${TARGET_VENDOR} so ...
>> - Switch all distros to have:
>>   require conf/distro/include/${PREFERED_LIBC}.inc
>>   - Clean up distro-specific includes, and sane-toolchain.inc a little
>>     bit by removing all of the PREFERRED_PROVIDER stuff it no longer
>>     needs.
>> - For glibc*.bb older than 2.5, add in some missing RPROVIDES.
> 
> I've pushed a trini/add-libc-overrides-2 branch with the following
> changes:
> - Change PREFERRED_LIBC to LIBC
> - Fold fixing up minimal/minimal-uclibc into the commit that brings in
>   the libc inc file.
> - Re-order commits so that everything is functional from commit to
>   commit.
> 
> I'm now looking for ack's to pull this branch into .dev
>