Date: Sat, 26 Oct 2013 22:41:42 +0100 From: Matthew Seaman <m.seaman@infracaninophile.co.uk> To: Jason Birch <jbirch@jbirch.net>, "freebsd-questions@freebsd.org" <freebsd-questions@freebsd.org> Subject: Re: Kernel/World/Ports compilation within jails; targeting many platforms. Message-ID: <526C3716.4000802@infracaninophile.co.uk> In-Reply-To: <CAA=KUht4Kyz=-J6yGJdPfO4Bnr0a8-qU8k_Aj2Gp0MKjjPM=Qw@mail.gmail.com> References: <CAA=KUht4Kyz=-J6yGJdPfO4Bnr0a8-qU8k_Aj2Gp0MKjjPM=Qw@mail.gmail.com>
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On 26/10/2013 11:53, Jason Birch wrote:
> As a concrete example, my 'main' system is a FreeBSD 9.1-RELEASE amd64
> system, and I would like to compile FreeBSD 11-CURRENT for my BeagleBon=
e
> Black (ARMv7). Does it make more sense to create a jail environment on =
my
> 9.1-RELEASE machine to do all compilation and 'staging' for the BeagleB=
lack?
I don't know about 'good form' but using jails to compile for different
FreeBSD versions is a well established practice. It's how the official
pkg_tools and now pkgng packages are generated, for example.
However, be aware there are some pretty major limitations to using jails
this way.
* You can have an older jail on a newer host system, but not the
converse. So building in an 11-CURRENT jail on a 9.1-RELEASE
system won't work.
* You don't get cross-architecture builds -- jails generally have to
be the same architecture as the host system. With one possible
exception. It may be possible to use an i386 jail on an amd64
host. Dunno if that actually works for building serious
quantities of ports.
For your case, 11-CURRENT/armv7 isn't going to work on
9.1-RELEASE/amd64. Your best bet would be some sort of VM where you
could emulate an armv7 CPU, if such a thing exists and is usable for
your intended purpose.
Cheers,
Matthew
--=20
Dr Matthew J Seaman MA, D.Phil.
PGP: http://www.infracaninophile.co.uk/pgpkey
JID: matthew@infracaninophile.co.uk
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