Re: [Qemu-devel] [PATCH] configure: don't optimize away avx2 test functions

[Mohammed Gamal]

Please drop this patch. I see it has already been fixed upstream

On Tue, Jun 21, 2016 at 11:10 AM, Mohammed Gamal
<address@hidden> wrote:
> The configure script contains an embedded test C function
> to test for avx2 support. It gets optimized away with
> gcc 4.7 on wheezy.
> Add __attribute__((optimize("O0"))) to it in order
> to prevent optimizing it away
>
> Signed-off-by: Mohammed Gamal <address@hidden>
> ---
>  configure | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/configure b/configure
> index 8ecf29d..ba31d3a 100755
> --- a/configure
> +++ b/configure
> @@ -1782,7 +1782,7 @@ fi
>
>  cat > $TMPC << EOF
>  static void bar(void) {}
> -static void *bar_ifunc(void) {return (void*) bar;}
> +static void __attribute__((optimize("O0"))) *bar_ifunc(void) {return (void*) 
> bar;}
>  static void foo(void) __attribute__((ifunc("bar_ifunc")));
>  int main(void) { foo(); return 0; }
>  EOF
> --
> 1.9.1
>



-- 
Mohammed Gamal
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