[fedora-arm] armv7hl requirements

[Chris Ball]

Hi Jon,

On Wed, May 04 2011, Jon Masters wrote:
> I'd like to kick off a discussion about flags for ARMv7. My proposal
> here is that we treat v7hl as an entirely different architecture, and
> don't try any multi-arch kind of hacks (there isn't the established user
> base for Fedora ARM to justify doing any of those things at the moment).
>
> Things I think we should consider as a minimum:
>
> *). Little endian (obviously, but worth stating) (l)
> *). Cortex-A8 or higher fully compliant core(s)
> *). ARM VFP3 hardware floating point (h)
> *). ARM NEON Architecture
> *). Thumb2 interworking
> *). Your suggestion here?
>
> I think we should build for ARM (as opposed to Thumb2) but we should
> support interworking with Thumb2 code through the toolchain options. We
> should then later consider implementing some Thumb2 optimization. It's
> more armv7thl, but the (t) is implied since it's ARMv7 anyway.
>
> Several folks have begun looking at toolchain bringup based on the F-15
> toolchain applied to an F-13 userspace initially. But I'd like us to
> discuss options/requirements for toolchains before we go too far.
>
> Once I get some feedback, I'll be updating the wiki, along with some
> more F-15 goals and (hopefully) generally useful stuff.

Just for the record, this sounds great from OLPC's perspective; +1.
(I expect we'd rather build for Thumb2, even if only for the size benefit.)

- Chris.
-- 
Chris Ball   <cjb at laptop.org>   <http://printf.net/>
One Laptop Per Child