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Date:      Thu, 12 Feb 2015 09:58:13 -0800
From:      Nathan Whitehorn <nwhitehorn@freebsd.org>
To:        freebsd-arm@freebsd.org
Subject:   Re: FreeBSD/arm64 MACHINE/MACHINE_ARCH identification
Message-ID:  <54DCE9B5.8040203@freebsd.org>
In-Reply-To: <CAPyFy2BKzhiA4tbi-mXd6T114_zawmWTi3XbyXiUcgijQfHdyw@mail.gmail.com>
References:  <CAPyFy2A=Ev5gdYPKgEE0LS3-1sY%2BXmkZA7VCe71E6Fmbb=vMRw@mail.gmail.com> <607BF592-A09B-4DB4-9872-C9E63066AB57@bsdimp.com> <CAPyFy2Bgrap3TkFNuChyMC0Vwbjdt5FVW0ey03XtkK1iwNL1KQ@mail.gmail.com> <71E9C1B9-F819-420B-90A5-A36D58E71817@bsdimp.com> <CAPyFy2ATn5xgsvePCdvzqnyBS45izVHdL8yLaQQoKeJenSv9tg@mail.gmail.com> <228428CC-4042-4902-90A4-E7040F4BFFF5@bsdimp.com> <CAPyFy2BKzhiA4tbi-mXd6T114_zawmWTi3XbyXiUcgijQfHdyw@mail.gmail.com>

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On 02/12/15 09:15, Ed Maste wrote:
>>> Oh - I don't care what directory Linux puts the kernel source in, only
>>> what's reported by uname.  As far as I can tell that has always been
>>> aarch64 for uname -m.
>>
>> Traditionally in Linux, they have been a matched set.
>
> Ok, it appears they may have abandoned this.
>
>>> We might decide that "uname -m" has to be aarch64 to match
>>> expectations of third-party software set by other operating systems.
>>> If that in turn means we have to move the kernel source, so be it.
>>
>> This one I’m not on board with. You’ve not made a compelling case for
>> it yet.
>
> That's why I said "we might decide" -- I'm not sure myself.
>
> However, there's no backwards compatibility concern here, we've never
> had a FreeBSD release that reports "arm64" for "uname -m". There's no
> reason for us to prefer "arm64" if everyone else uses "aarch64."
> Also, having arm64 for uname -m and aarch64 for uname -p seems a bit
> odd.

I would assume uname -m would be "arm", not "arm64". Unless there are 
fundamental platform differences you are baking in somehow, which I 
don't know.
-Nathan



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