Date: Wed, 10 Jul 2013 23:31:15 +0200 From: Baptiste Daroussin <bapt@freebsd.org> To: Warner Losh <imp@bsdimp.com> Cc: Adrian Chadd <adrian@freebsd.org>, Dimitry Andric <dim@freebsd.org>, Andrew Turner <andrew@fubar.geek.nz>, freebsd-arch@freebsd.org Subject: Re: Adding a MACHINE_ARCH note Message-ID: <20130710213115.GG68830@ithaqua.etoilebsd.net> In-Reply-To: <AE10F27F-6D86-45F0-8C8D-1274CF09CC42@bsdimp.com> References: <32F979BD-FB5C-4111-9586-4C5E7C6DFA71@bsdimp.com> <CAJ-Vmo=sUKs4u-pq%2B1hx-q1bfhPugMcSp4XYzNcBNwHMrw3Kug@mail.gmail.com> <20130710195547.GB68830@ithaqua.etoilebsd.net> <201307101611.37437.jhb@freebsd.org> <20130710212436.GF68830@ithaqua.etoilebsd.net> <AE10F27F-6D86-45F0-8C8D-1274CF09CC42@bsdimp.com>
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[-- Attachment #1 --] On Wed, Jul 10, 2013 at 03:27:12PM -0600, Warner Losh wrote: > > On Jul 10, 2013, at 3:24 PM, Baptiste Daroussin wrote: > > > On Wed, Jul 10, 2013 at 04:11:37PM -0400, John Baldwin wrote: > >> On Wednesday, July 10, 2013 3:55:47 pm Baptiste Daroussin wrote: > >>> On Wed, Jul 10, 2013 at 12:26:42PM -0700, Adrian Chadd wrote: > >>>> On 10 July 2013 09:55, Warner Losh <imp@bsdimp.com> wrote: > >>>> > >>>>>> That's the reason I replied about it. Not specifically to make it > >>>>>> happen _everywhere_, but to see if we're about to migrate to a tool > >>>>>> that doesn't support it, making it a much bigger deal to migrate again > >>>>>> later. > >>>>> > >>>>> I've been talking to Baptiste, and it will support this. > >>>> > >>>> Sweet. > >>>> > >>>> Thanks! > >>>> > >>>> > >>>> -adrian > >>> > >>> Yeah I need to get a simple and uniq way to gather the different ABI, I have > >>> been creating my own ABI string to solve this, but I'm far from being a > >>> specialist. > >>> > >>> While thinking about this kind of thing, please please think about a format that > >>> can easily give us a way to figure out a way to get cross ABI binaries support. > >>> > >>> pkgng needs for example to allow i386 packages to be installed on amd64 because > >>> amd64 does support it. > >>> > >>> Maintaining a list the compatibility will be painful. > >>> > >>> In my own version I have > >>> os:version:family:class:... > >>> > >>> for example here: > >>> on FreeBSD 9 i386 we have: > >>> > >>> freebsd:9:x86:32 > >>> > >>> on FreeBSD 10 amd64 we have: > >>> > >>> freebsd:9:x86:64 > >>> > >>> now if I do want a package I can install on both amd64 and i386 I just have to > >>> create a package saying: > >>> > >>> freebsd:9:x86 > >>> > >>> or if I want a package that can be installed on all arches: > >>> > >>> freebsd:9 > >>> > >>> It became complicated for arm and mips because of the multiple variation > >>> available. > >> > >> You should look at how MACHINE_CPUARCH vs MACHINE vs MACHINE_ARCH works. > >> > >> Keep in mind that amd64/i386/pc98 should probably have MACHINE_CPUARCH of x86, > >> but we just haven't done that yet. If we did that I think you could follow > >> src's conventions and be fine. Something like: > >> > >> os:version:cpuarch:arch > >> > >> Where cpuarch == MACHINE_CPUARCH (should be x86 on amd64/i386/pc98, but isn't > >> yet. It ss sane on other platforms) and > >> arch == MACHINE_ARCH (amd64/i386 (for pc98 MACHINE_ARCH is i386)) > >> > >> So that would give: > >> > >> freebsd:9:x86:amd64 > >> freebsd:9:x86:i386 (for both pc98 and i386) > >> freebsd:9:arm:armv6 > >> > >> etc. > >> > >> I think that means we could eventually support x32 as: > >> > >> freebsd:9:x86:x32 > >> > >> We might have an x32 world (but perhaps not a kernel?, though we would need > >> the headers to DTRT) > > > > I do like the idea a lot. > > We should add a flag to uname to get MACHINE_CPUARCH, and publish it as hw.cpu_arch in sysctl. > I will still have to workaround on older releases. The one without those informations. regards, Bapt [-- Attachment #2 --] -----BEGIN PGP SIGNATURE----- Version: GnuPG v2.0.19 (FreeBSD) iEYEARECAAYFAlHd0qMACgkQ8kTtMUmk6Ewo2gCgp6savr1WldJnX7bdfIFEzZmk iXsAnio+PbjWd2JlRVxIXtGnIYynxOGQ =ShTv -----END PGP SIGNATURE-----
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