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
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