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Date: Thu, 31 Dec 2020 13:03:10 +0100
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Subject: Re: libntl binaries not portable
To: Marco Atzeri <marco DOT atzeri AT gmail DOT com>
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From: "E. Madison Bray via Cygwin" <cygwin AT cygwin DOT com>
Reply-To: "E. Madison Bray" <erik DOT m DOT bray AT gmail DOT com>
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On Thu, Dec 31, 2020 at 12:43 PM Marco Atzeri wrote:
>
> On 31.12.2020 12:14, E. Madison Bray via Cygwin wrote:
> > Hello,
> >
> > (and attn: Marco Atzeri)
> >
> > I use Cygwin's libntl package in my software, and some users are
> > reporting illegal instruction errors which appear to be coming from
> > Cygwin's NTL, which was built with native optimizations enabled.
> >
> > It should probably be configured with
> >
> > ./configure NATIVE=off
> >
> > while possibly still selecting at least some arch-specific
> > optimizations, such as CXXFLAGS=-mavx.
> >
> > I haven't figured out exactly which features these users' CPUs are
> > missing but I've seen problems in the past with the PCLMUL
> > instructions.
> >
> > Thanks,
> > Madison
>
> Hi Madison
> Noted.
>
> I will look to rebuild the package.
>
> Regards
> Marco

Awesome, thank you!  And no urgency on my part.  Have a happy new year!
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