[oe] [RFC] add ubuntu patch which adds atomic builtin support to gcc 4.3.[3 but also other microversions]

[Khem Raj]

On Wed, Jun 16, 2010 at 1:02 AM, Graeme Gregory <dp at xora.org.uk> wrote:
> On Wed, 16 Jun 2010 09:27:50 +0200
> Robert Schuster <thebohemian at gmx.net> wrote:
>
>> Hi,
>> Angstrom's default GCC is 4.3.3 for ARM. Unfortunately that version
>> lacks atomic intrinsics support for the very same architecture
>> (__sync_synchronize and friends). The support is available from 4.4.x
>> onwards but a patch exists in Ubuntu's GCC that adds the intrinsics to
>> the earlier GCC version. I would like add that patch to our GCC 4.3.x
>> (all of them so there is not suddenly a feature missing when one
>> changes from one microversion to another). This has the potential for
>> drastic effects on other recipes because a lot of programs (e.g.
>> pulseaudio, llvm) check for the availability of the intrinsics and
>> make use of them in that case.
>>
>> I ask for comments here because I would also like to see this change
>> move into OE stable later on. (The use case is to get OpenJDK with the
>> Shark JIT compiler [llvm-based] to run on the bug20 hardware).
>>
>> Regards,
>> Robert
>
> This sounds like it would require a DISTRO_PR bump on the Angstrom side

why a DISTRO_PR bump. ? Just update the libgcc

> which I am fine with, but we need to synchronize so there are enough
> Angstrom developers to re-fill the feeds on bump day.
>
> Otherwise I think this is a very good idea.
>
> Graeme
>
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