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Date:      Fri, 6 Apr 2018 21:00:30 +0200
From:      Oliver Pinter <oliver.pinter@hardenedbsd.org>
To:        John Baldwin <jhb@freebsd.org>
Cc:        Ed Maste <emaste@freebsd.org>, Antoine Brodin <antoine@freebsd.org>,  src-committers <src-committers@freebsd.org>, re <re@freebsd.org>, svn-src-stable@freebsd.org,  svn-src-all@freebsd.org, Dimitry Andric <dim@freebsd.org>, svn-src-stable-11@freebsd.org, Mark Linimon <linimon@lonesome.com>
Subject:   Re: svn commit: r331838 - in stable/11: . contrib/compiler-rt/include/sanitizer contrib/compiler-rt/include/xray contrib/compiler-rt/lib/BlocksRuntime contrib/compiler-rt/lib/asan contrib/compiler-rt/l...
Message-ID:  <CAPQ4ffsmkdDSuozhuXeUV_aAHZDXBTQHBVvh7kZ=_Zu=tyjx8A@mail.gmail.com>
In-Reply-To: <2526702.9M648BMneK@ralph.baldwin.cx>
References:  <201803311138.w2VBcKHP014025@repo.freebsd.org> <20180331184109.GA23589@lonesome.com> <CAPyFy2DL3Acp6DanoZBZm57XWhiujtM0os9Yau6spe%2Bhdzn8Gg@mail.gmail.com> <2526702.9M648BMneK@ralph.baldwin.cx>

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On 4/6/18, John Baldwin <jhb@freebsd.org> wrote:
> On Monday, April 02, 2018 12:27:47 PM Ed Maste wrote:
>> On 31 March 2018 at 14:41, Mark Linimon <linimon@lonesome.com> wrote:
>> This is the most important point of this discussion: we do need to
>> ensure there's good communication and coordination between teams where
>> dependencies like this exist. I'll take the blame here: Dimitry asked
>> me about merging the Clang update to stable/11 and I agreed that it
>> was reasonable to merge sooner rather than later to have as much lead
>> time as possible before the 11.2 process starts. I also assumed that
>> outstanding Clang 6 issues in ports were farther along in being
>> addressed.
>>
>> The key lesson from this discussion is that for significant commits
>> and merges like this one we should make sure to always have sufficient
>> advance notice.
>
> Is this driven by -mretpoline?

Don't think so since it requires LLD as linker. The LLVM 5 which was already
part of the 11-stable has the retpoline option. See r331219.

>From other side, I like to see a newer compiler sets in the recent
releases, because
there are lot of performance improvements and other fixes.

> That is, would we not be as aggressive
> with pushing for clang 6 in 11.2 if it weren't for that?  I kind of feel
> like we probably wouldn't and would have left it at 5 and let clang 6 be
> a FreeBSD 12 thing.  Was -mretpoline backported to clang 5 (I thought
> there was some talk of providing patches for clang 5)?
>
> --
> John Baldwin
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