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Date:      Wed, 1 Jan 2014 18:41:42 +0800
From:      Erich Dollansky <erichsfreebsdlist@alogt.com>
To:        freebsd@dreamchaser.org
Cc:        FreeBSD Mailing List <freebsd-questions@freebsd.org>
Subject:   Re: updating /sys/sys
Message-ID:  <20140101184142.5f11b3f6@X220.alogt.com>
In-Reply-To: <52C3CC18.30407@dreamchaser.org>
References:  <52C37801.8010001@dreamchaser.org> <20140101114745.3a3e37fb@X220.alogt.com> <52C3CC18.30407@dreamchaser.org>

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Hi,

On Wed, 01 Jan 2014 01:04:40 -0700
Gary Aitken <freebsd@dreamchaser.org> wrote:

> On 12/31/13 20:47, Erich Dollansky wrote:
> 
> >> I just used freebsd-update to upgrade from 9.1 to 9.2. Everything
> >> seemed to go properly, but if I look at /sys/sys all of the .h
> >> files say something like: * $FreeBSD: release/9.0.0/sys/sys/cons.h
> >> 196506 2009-08-24 10:53:30Z ed $
> >> 
> >> /etc/freebsd-update looks like:
> >> 
> >> ... Components src world kernel IgnorePaths ...
> >> 
> >> Why aren't they updated?
> > 
> > why should they? They define the 'interface' to the implementation.
> > It is most important that these interfaces do change as little as
> > possible especially in a STABLE version.
> 
> If I think about it, it seems that what you say should be the case.
> However, if you download the src tarball and do some diffs, you will
> see that many of them are in fact different; how significant those
> differences are, I'm not sure.  I hit this problem trying to build
> sysutils/lsof quite a while ago.  It still doesn't build for me after
> upgrading to 9.2.

I never used a 9.X, so I do not know. If .h files are changed - I mean
not just the comments - it is not possible to run old binaries from the
version before. But binaries from 9.0 should run on 9.2.
> 
> > They can change when you update to 10 and they can change all the
> > while on CURRENT but not on RELEASE versions like 8 and 9.
> 
> Maybe that *should* be the situation, but it is not in actuality.

It happens for parts which under development.
> 
> >> What's the best way to get them updated?
> > 
> > You should have the current version if nothing is mentioned in
> > UPDATING.
> 
> I ended up getting them via the src.txz tarball:
> ftp://ftp.freebsd.org/pub/FreeBSD/releases/amd64/amd64/9.2-RELEASE/
> 
> Moving the 9.0 /usr/src/sys/sys directory to the side and symlinking
> to the usr/src/sys/sys directory from the 9.2 tarball allows it to
> compile.

Sounds strange. Every RELEASE must compile. At least the world has to
compile. It is a different story for a custom build kernel. There is
the chance that you select a combination of options which will not
result in a working kernel. Sometimes, this is documented, sometimes,
it is not.

Erich
> 
> Gary
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