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Date: Mon, 13 Jun 2016 11:58:55 +0100
From: "Dr. David Alan Gilbert" <dgilbert@redhat.com>
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Subject: Re: [Qemu-devel] [PATCH v3 0/2] AVX2 configure fixes
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To: Peter Maydell <peter.maydell@linaro.org>
Cc: QEMU Developers <qemu-devel@nongnu.org>, Paolo Bonzini <pbonzini@redhat.com>, Liang Li <liang.z.li@intel.com>, Amit Shah <amit.shah@redhat.com>, Juan Quintela <quintela@redhat.com>

* Peter Maydell (peter.maydell@linaro.org) wrote:
> On 10 June 2016 at 12:16, Dr. David Alan Gilbert (git)
> <dgilbert@redhat.com> wrote:
> > From: "Dr. David Alan Gilbert" <dgilbert@redhat.com>
> >
> > Hi,
> >   This pair of patches fixes a couple of issues that we found during test.
> > The first is that the configure test is pessimistic when compiled with -O2,
> > the second is that the explicit 4.9 gcc test is a bit coarse; I've removed
> > that test but beefed up the ./configure test to actually use the avx2
> > intrinsics and that fails in the same way as the main code, so it works
> > in the same way as the explicit check but allows older gcc's to work
> > when -save-temps isn't used.
> >
> > Dave
> >
> > v3
> >   Use compile_object rather than compile_prog as suggested by Peter to
> >   hopefully fail on his ccache setup.
> 
> I ran these patches through my build tests and it all compiled OK,
> so the new configure test does correctly say "no AVX" on this setup.

Thanks for checking.

Dave

> 
> thanks
> -- PMM
--
Dr. David Alan Gilbert / dgilbert@redhat.com / Manchester, UK