FreeBSD/arm64 MACHINE/MACHINE_ARCH identification
Ed Maste
emaste at freebsd.org
Thu Feb 12 16:05:44 UTC 2015
On 12 February 2015 at 01:54, Warner Losh <imp at bsdimp.com> wrote:
>
> They moved the sources in the kernel from aarch64 to arm64. I’m sure.
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.
> config.guess uses uname -p:
>
> *:FreeBSD:*:*)
> UNAME_PROCESSOR=`/usr/bin/uname -p`
> echo ${UNAME_PROCESSOR}-unknown-freebsd`echo ${UNAME_RELEASE}|sed -e 's/[-(].*//'`
> exit ;;
Ah, yes - it looks like this has changed repeatedly over time, and I
must have looked at a rather outdated config.guess. It's clear from
this snippet though that this is a special case for FreeBSD, and most
other cases rely on uname -m. I also found a few other configure-like
scripts that only use uname -m.
> so uname -p must be ‘aarch64’ since that’s what is expected.
Yes, I agree this is necessary.
> uname -m must
> be arm64 unless we move our kernel implementation to sys/aarch64 from the
> sys/arm64 it is now.
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.
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