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Re: [Qemu-devel] [PATCH v3 0/2] AVX2 configure fixes

From: Peter Maydell
Subject: Re: [Qemu-devel] [PATCH v3 0/2] AVX2 configure fixes
Date: Mon, 13 Jun 2016 11:51:23 +0100

On 10 June 2016 at 12:16, Dr. David Alan Gilbert (git)
<address@hidden> wrote:
> From: "Dr. David Alan Gilbert" <address@hidden>
> 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.

-- PMM

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