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Date: Thu, 24 Oct 2019 08:26:09 +0000
From: Alexey Dokuchaev <danfe@freebsd.org>
To: Dimitry Andric <dim@freebsd.org>
Cc: src-committers@freebsd.org, svn-src-all@freebsd.org,
 svn-src-head@freebsd.org
Subject: Re: svn commit: r353936 -
 head/contrib/llvm/tools/clang/lib/Driver/ToolChains/Arch
Message-ID: <20191024082609.GA63459@FreeBSD.org>
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On Wed, Oct 23, 2019 at 04:57:12PM +0000, Dimitry Andric wrote:
> New Revision: 353936
> URL: https://svnweb.freebsd.org/changeset/base/353936
> 
> Log:
>   Bump clang's default target CPU for the i386 architecture (aka "x86") to
>   i686, as per the discussion on the freebsd-arch mailing list.  Earlier
>   in r352030, I had already bumped it to i586, to work around missing
>   atomic 64 bit functions for the i386 architecture.

Why i686, not i586?  i486 lacking 64-bit atomics is a sound and valid
reason, but I don't understand why i586 wasn't chosen, and quick review
of that -arch thread did not help.  Could you shed some more light here?

./danfe