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Date:      Wed, 07 Mar 2001 01:34:39 -0800
From:      Jordan Hubbard <jkh@osd.bsdi.com>
To:        ohartman@klima.physik.uni-mainz.de
Cc:        freebsd-stable@FreeBSD.ORG
Subject:   Re: ARCH flag in new make.conf
Message-ID:  <20010307013439I.jkh@osd.bsdi.com>
In-Reply-To: <Pine.BSF.4.33.0103070915530.17134-100000@klima.physik.uni-mainz.de>
References:  <Pine.BSF.4.33.0103070915530.17134-100000@klima.physik.uni-mainz.de>

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From: "Hartmann, O." <ohartman@klima.physik.uni-mainz.de>
Subject: ARCH flag in new make.conf
Date: Wed, 7 Mar 2001 09:30:33 +0100 (CET)

> I'm really confused and surprised by the fact, that with the upcoming new
> FreeBSD 4.3 in its make.conf we can choose architectural parameters for the
> CPU architecture. And I will tell you why.

It's not supposed to be set by the "general public" and failing to
note this was an error, thanks.  I've just committed the following patch:

+# $FreeBSD: src/etc/defaults/make.conf,v 1.97.2.38 2001/03/07 08:39:29 jkh Exp $
 #
 # NOTE:  Please would any committer updating this file also update the
 # make.conf(5) manual page, if necessary, which is located in
@@ -25,6 +25,16 @@
 #       (AMD CPUs)     k7 k6-2 k6 k5
 #       (Intel CPUs)   p4 p3 p2 i686 i586/mmx i586 i486 i386
 #   Alpha/AXP architecture: ev6 pca56 ev56 ev5 ev45 ev4
+#
+# WARNING! WARNING! WARNING! WARNING! WARNING! WARNING! WARNING! WARNING!
+#
+# It should also be noted that YOU SHOULD NOT SET CPUTYPE TO ANYTHING
+# unless you're absolutely 100% sure you know what you are doing!  Some
+# things are known to break with -march=i686, for example, and simply
+# building the world and kernel with CPUTYPE set to something other than
+# the default (i386) is currently guaranteed to hurt you.  You should
+# build things very selectively with CPUTYPE set and proceed only if they
+# still appear to work.
 #
 #CPUTYPE=i686
 #NO_CPU_CFLAGS=        true    # Don't add -march=<cpu> to CFLAGS automatically

I hope that this will prevent others from following (falling?) in your
footsteps.

- Jordan

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