Followup on ARM Minisummit at 2011 LPC
jcm at redhat.com
Thu Oct 6 17:38:02 UTC 2011
On Tue, 2011-10-04 at 00:41 -0300, Paulo César Pereira de Andrade wrote:
> For now I have been only considering gcc as compiler
I think, realistically, so have we. But I'm open to rethinking that.
> and the link in
> infocenter.arm.com appears to suggest that the mapping, to have an
> armv7 distro capable of running existing armv5 or older software, would be:
> gcc -mfloat-abi=softfp -mfpu=vfpv3-d16 -> tcc /hardfp /nofpregargs
> possibly replacing vfpv3-d16 with neon
> but the problem is, the tcc (arm C compiler!?) calls softfp what gcc
> calls -mfloat-abi=soft, but "now" only supports hardp with what gcc
> calls -mfloat-abi=hard calling convention.
So, it's true that we're basically saying as far as we believe Linux
distributions go in the ARMv7 timeframe, we assume hardfloat and will
all be using the newer ABI. Is that what you meant?
> > Jon and I have both been talking to Mats and Jeff about LSB already,
> > but things have gone a little quiet while we've been concentrating on
> > bringup in the last few months. They would definitely be the right
> > people to work with going forwards...
So...Adam, we need to sync up on this. I would like to have made a
little progress by the time we get to Connect next month.
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