DMARC-Filter: OpenDMARC Filter v1.3.2 sourceware.org A8196385800A
Subject: Re: libntl binaries not portable
To: "E. Madison Bray" <erik.m.bray@gmail.com>, cygwin@cygwin.com
References: <CAOTD34Yo1moTfya-AfQKxx+Ei5Yfw4Tt6FaCCfTBHbmba77aYQ@mail.gmail.com>
Message-ID: <079e3e9a-cbb6-6cdb-37f8-1bdf8fe56d79@gmail.com>
Date: Thu, 31 Dec 2020 12:43:11 +0100
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From: Marco Atzeri via Cygwin <cygwin@cygwin.com>
Reply-To: Marco Atzeri <marco.atzeri@gmail.com>
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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

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