Date: Sat, 23 Jun 2012 14:07:28 -0700 From: Tim Kientzle <kientzle@freebsd.org> To: Warner Losh <wlosh@bsdimp.com> Cc: arm@freebsd.org Subject: Re: armv6 tree vs. buildkernel Message-ID: <0078302D-CC33-4B89-87BE-50C77D4855BE@freebsd.org> In-Reply-To: <D0A60CD4-E0CF-4D7B-9E87-22D9A12048D1@bsdimp.com> References: <3F1A5B5F-0787-41CE-8C77-8B1F9A601172@freebsd.org> <31C8D224-72D4-4BE8-8EC3-29B078C7DAC3@bsdimp.com> <C75EE66B-30CE-48C7-8CC2-5DEC9F9D7F24@freebsd.org> <D0A60CD4-E0CF-4D7B-9E87-22D9A12048D1@bsdimp.com>
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On Jun 23, 2012, at 12:58 PM, Warner Losh wrote: >=20 > On Jun 23, 2012, at 12:58 PM, Tim Kientzle wrote: >> On Jun 23, 2012, at 7:35 AM, Warner Losh wrote: >>>=20 >>>> P.S. How is CPUTYPE/TARGET_CPUTYPE supposed to be inferred for = regular "buildworld"? >>>> The only option I can find is to set it explicitly in /etc/src.conf >>>=20 >>> It can't possibly work very well. We need to get TARGET_ARCH=3Darmv6 = working instead of continuing these kludges. >>=20 >>=20 >> Help get me oriented and I'll start grinding through this. >>=20 >> What values of TARGET_ARCH should be supported? >=20 > arm, armeb, armv6 (and maybe armv6eb if they make those). So do you consider the -DARM_ARCH_6 and -D_ARM_ARCH_6 defines to be among these "kluges"? How should the C source identify the architecture and customize itself? I'm trying to get a clearer picture of how this *should* work before I start roto-tilling a lot of code. >> Right now, there are ARCH values of arm and armeb. >> Should there be armv6eb? armv7? >=20 > There should be no armv7, since armv6 means v6 and later. At some = point there will be an arm64, I suppose too. So if someone wants an armv7 tree, they should have TARGET=3Darm TARGET_ARCH=3Darmv6 TARGET_CPUTYPE=3Darmv7 >> I'm also unclear on the distinction between make's MACHINE_ARCH >> and uname -p; are these supposed to be the same? If so, shouldn't >> make be using a sysctl instead of a hard-coded value? >=20 > I thought it already did. That might not be a bad idea. MACHINE_ARCH = and uname -p should be identical. If they aren't, that's a bug. Ah. That helps. (This certainly isn't true in the current make source and I can't find where this assumption is documented.) > I posted patches here before to do all (most?) of MACHINE_ARCH=3Darmv6. = Have you tried them on the armv6 branch? I've not had a chance to port = them over yet. I've seen some oblique references to those patches but haven't tracked them down to study yet. Is this r234548 in users/imp? Tim
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