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Date:      Sat, 22 Jul 2017 22:32:53 +0200
From:      Dimitry Andric <dim@FreeBSD.org>
To:        Shawn Webb <shawn.webb@hardenedbsd.org>
Cc:        FreeBSD Current <freebsd-current@freebsd.org>
Subject:   Re: HEADS-UP:  Merged llvm/clang 5.0.0 into -CURRENT (as of r321369)
Message-ID:  <79E2E246-88BA-4B0E-BCDA-570D4FA983E2@FreeBSD.org>
In-Reply-To: <20170722173813.4jixxgn5mtwajff5@mutt-hbsd>
References:  <719BE3EE-00E3-4BAB-A19C-6965BAD67CC9@FreeBSD.org> <20170722153308.3ity33nd5brngbky@mutt-hbsd> <20170722173217.x2nob6ul35jszyor@mutt-hbsd> <20170722173813.4jixxgn5mtwajff5@mutt-hbsd>

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On 22 Jul 2017, at 19:38, Shawn Webb <shawn.webb@hardenedbsd.org> wrote:
>=20
> On Sat, Jul 22, 2017 at 01:32:17PM -0400, Shawn Webb wrote:
>> On Sat, Jul 22, 2017 at 11:33:08AM -0400, Shawn Webb wrote:
>>> On Sat, Jul 22, 2017 at 02:36:03PM +0200, Dimitry Andric wrote:
>>>> Hi,
>>>>=20
>>>> I have merged clang, llvm, lld, lldb, compiler-rt and libc++ 5.0.0
>>>> (trunk r308421) into head.  Universe builds went just fine, but if =
you
>>>> encounter any snags during world and/or kernel builds, please file =
PRs.
>>>>=20
>>>> Since upstream has just created their 5.0.0 release branch, this is =
a
>>>> good month to shake out any remaining issues for FreeBSD.  If you =
are
>>>> certain bugs or regressions you encounter are due to upstream, file =
PRs
>>>> there, but otherwise, just report them on the FreeBSD bug tracker.
>>>=20
>>> Hey Dimitry,
>>>=20
>>> Thank you very much for your hard work and dedication to bringing =
the
>>> llvm toolchain to FreeBSD.
>>>=20
>>> I haven't nailed down whether it's SafeStack, CFI, or using lld as =
the
>>> default linker, but it looks like we in HardenedBSD are getting an
>>> undefined symbol during buildworld.
>>>=20
>>> Here's the logfile:
>>>=20
>>> =
http://jenkins.hardenedbsd.org:8180/jenkins/job/HardenedBSD-CURRENT-amd64/=
910/consoleText
>>>=20
>>> I'm working right now on figuring out what caused it. I'll report =
back
>>> when I know more.
>>=20
>> Found the culprit: WITH_LLD_BOOTSTRAP. It looks like when
>> MK_LLD_BOOTSTRAP is set to yes, then you get the error in the Jenkins
>> log above. At least, on amd64. I do _not_ get the error on arm64.
>=20
> I forgot to mention that WITH_LLD_IS_LD is set, too. I haven't tested
> WITH_LLD_BOOTSTRAP && WITHOUT_LLD_IS_LD.

Hi Shawn,

I've tried reproducing, using WITH_LLD_BOOTSTRAP and WITH_LLD_IS_LD, but
buildworld finishes without issues for me.  This is with explicit
__MAKE_CONF=3D/dev/null and SRCCONF=3D/dev/null environment variables, =
so
everything else is at its defaults.

Do you have any other particular settings, like modified default CFLAGS
or LDFLAGS, either in your share/mk/*.mk files, or somewhere else?

-Dimitry


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