From owner-freebsd-bugs@FreeBSD.ORG  Tue Sep  7 14:01:16 2010
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Date: Tue, 7 Sep 2010 14:01:16 +0000
From: Alexander Best <arundel@freebsd.org>
To: John Baldwin <jhb@freebsd.org>
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	<201009070915.18394.jhb@freebsd.org>
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Subject: Re: kern/150199: [build] kernel doesn't compile with SYSVMSG and
	any of COMPAT_FREEBSD[456] but no COMPAT_FREEBSD7
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On Tue Sep  7 10, John Baldwin wrote:
> On Tuesday, September 07, 2010 7:45:58 am arundel@freebsd.org wrote:
> > Synopsis: [build] kernel doesn't compile with SYSVMSG and any of COMPAT_FREEBSD[456] but no COMPAT_FREEBSD7
> > 
> > Responsible-Changed-From-To: freebsd-bugs->jhb
> > Responsible-Changed-By: arundel
> > Responsible-Changed-When: Tue Sep 7 11:40:48 UTC 2010
> > Responsible-Changed-Why: 
> > John might have an opinion on this PR, since he added the '20090624' entry to
> > /usr/src/UPDATING which deals with the COMPAT_FREEBSD[4-7] options.
> 
> Not a bug:
> 
> 20090624:
>         The ABI of various structures related to the SYSV IPC API have been
>         changed.  As a result, the COMPAT_FREEBSD[456] and COMPAT_43 kernel
>         options now all require COMPAT_FREEBSD7.  Bump __FreeBSD_version to
>         800100.

wouldn't something like the following make sense?

.if !defined(COMPAT_FREEBSD7)
. if defined(COMPAT_43) | defined(COMPAT_FREEBSD4) | defined(COMPAT_FREEBSD5) | defined(COMPAT_FREEBSD6)
COMPAT_FREEBSD7 = true
. endif
.endif

cheers.
alex

> 
> -- 
> John Baldwin

-- 
a13x