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From: "Jason A. Donenfeld" <Jason@zx2c4.com>
Date: Wed, 6 Jul 2016 17:16:42 +0200
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To: Baptiste Jonglez <baptiste@bitsofnetworks.org>
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Subject: Re: [WireGuard] OpenWRT package for wireguard
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There's also a lot to be done with -flto. I was working on getting
this working last year but ran into some snags. I'll give it another
try.

There's also the more bootleg version of running with -fwhole-program
and then using the __visible attribute on the module init/cleanup
functions. I don't know if this would actually work properly though.