From owner-freebsd-stable  Wed Mar 21  6:22:57 2001
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Date: Wed, 21 Mar 2001 09:22:19 -0500
From: James Housley <jim@thehousleys.net>
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To: "Robin P. Blanchard" <Robin_Blanchard@gactr.uga.edu>
Cc: freebsd-stable@freebsd.org
Subject: Re: buildworld for alternate target
References: <3AB8B728.68A036D5@gactr.uga.edu>
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"Robin P. Blanchard" wrote:
> 
> how do i specify an alternate builddir (other than /usr/obj)
> so that i might build a separate obj that is optimized for
> my 486 (my current build is optimized for 686)?
> 

One way, if you get no other responses, is this:

cd /usr
ln -s src src-486
cd /usr/src ; make CPUTYPE=i686 buildworld
cd /usr/src-486 ; make CPUTYPE=i486 buildworld

For awhile I had 2 source trees, 3.X and 4.X.  What this will do is
build into /usr/obj/usr/src and /usr/obj/usr/src-486.  Then on you 486
machine you will need to do:

mkdir /usr/src-486
mount buildmachine:/usr/src-486 /usr/src-486
mount buildmachine:/usr/obj /usr/obj

And on the i686 class machines:

mount buildmachine:/usr/src /usr/src
mount buildmachine:/usr/obj /usr/obj

The only other catch is on the i486 machines you will need to run
mergemaster as:

mergemaster -m /usr/src-486/etc

Jim
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