On Wed, Apr 4, 2012 at 12:48 AM, Michael Hope <michael.h...@linaro.org> wrote: > On 4 April 2012 11:11, Jakub Jelinek <ja...@redhat.com> wrote: >> On Wed, Apr 04, 2012 at 09:18:59AM +1200, Michael Hope wrote: >>> >> The subdirectories could be called fred and jim and it would still work. >>> >> The only thing required is that this part of the naming scheme be >>> >> agreed amongst the distros. >>> >> >>> >> This looks to me like it's turning into a bike-shed painting excerise >>> >> between the distros out there. That's really sad. >>> > >>> > I don't think we ever even had the discussion: Debian invented their >>> > Debian-internal scheme for managing multiple ABIs. They have in the past >>> > used patched versions of gcc, as in the case of x86_64. >>> >>> (cc'ed cross-distro as the discussion is also going on there[1]. This >>> patch continues that) >>> >>> I like the idea of incompatible binaries having different loaders. >>> The path doesn't matter but the concept does. Like i686/x86_64, it >>> gives distros the option to install different binaries alongside each >>> other for compatibility, performance, or upgrade reasons. The >>> compatibility cost is nice and low and lets Debian do some interesting >>> cross development things. >> >> Does the dynamic linker itself contain any routines that depend on the >> soft/hard ABI? That would quite surprise me, so I don't see the point of >> having different dynamic linkers for those ABIs. One dynamic linker should >> handle both just fine. >> >>> No one has released a hard float based distro yet. We have time to >>> discuss and fix this so we don't get in the crazy situation where a >>> third party binary only runs on some distros. >> >> Isn't e.g. Fedora 17/armv7hl a hard float based distro? > > Yip, as is Ubuntu Precise, Debian unstable, and a skew of Gentoo. > None have been released yet. Here's my understanding: > > Fedora 17: > * ARM is a secondary architecture > * Alpha 1 release is out > * Has both a ARMv5 soft float and ARMv7 hard float build
Beta isn't far off and we're working toward Primary Arch. > Ubuntu Precise: > * ARM is a primary architecture > * Beta 2 is out > * ARMv7 hard float by default with ARMv7 softfp being community supported > > Debian: > * ARM is a primary architecture > * Has a ARMv4T soft float and in-development ARMv7 hard float > > openSUSE: > * Kicked off at a hackfest in September 2011 > * Have a ARMv5T soft float and ARMv7 hard float build Is only hard float, they haven't ruled out doing v5 soft float but it's not their current focus. Peter
