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Date: Tue, 22 Jan 2008 10:29:40 -0700 (MST)
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To: ru@FreeBSD.org
From: "M. Warner Losh" <imp@bsdimp.com>
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Cc: cvs-src@FreeBSD.org, src-committers@FreeBSD.org, cvs-all@FreeBSD.org,
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Subject: Re: cvs commit: src Makefile.inc1 src/tools/build Makefile
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In message: <20080122171051.GB19248@team.vega.ru>
            Ruslan Ermilov <ru@freebsd.org> writes:
: > : I only wonder how was the value of 600029 choosen?
: > 
: > It was two revisions before the branch point for RELENG_6, which
: > happened at 600031.
: 
: I think you're twice off-by-one here,
: 
: : $ cvs -R ann -rRELENG_6_BP param.h | grep '#define.*__FreeBSD_version'
: : 
: : Annotations for param.h
: : ***************
: : 1.244        (sam      11-Jul-05): #define __FreeBSD_version 600032     /* Master, propagated to newvers */
: 
: but it still doesn't answer my question.  Why you've choosen
: this __FreeBSD_version and not RELENG_6_BP (i.e., 600032).
: I don't mind it, just want to understand the formulae.  :-)

Maybe I should have selected this.  I wanted to select the version
that would work rather than the branch point.  Maybe this was silly of
me.

: > It also is one greater than the largest if that
: > was removed.
: 
: Can you elaborate on what you mean here?  I don't understand.
: Thanks.

The following line:

.if ${BOOTSTRAPPING} < 600029

was the line with the biggest number on the right hand side of the <
that was removed.  Meaning that anything 600029 and newer will still
work.

Warner