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

[Graeme Gregory]

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
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