Date: Mon, 29 Aug 2016 11:10:15 -0700 From: "Ngie Cooper (yaneurabeya)" <yaneurabeya@gmail.com> To: Bryan Drewery <bdrewery@FreeBSD.org> Cc: Li-Wen Hsu <lwhsu@FreeBSD.org>, "jenkins-admin@freebsd.org" <jenkins-admin@freebsd.org>, "freebsd-testing@freebsd.org" <freebsd-testing@freebsd.org>, Dimitry Andric <dim@FreeBSD.org> Subject: Re: Jenkins build is still unstable: FreeBSD_HEAD #564 Message-ID: <3B60A57F-778C-4E7C-B081-098C0F6E92D2@gmail.com> In-Reply-To: <B014DD06-4BB2-4503-8908-C78EFEE0FCA2@gmail.com> References: <1491374121.44.1472440150670.JavaMail.jenkins@jenkins-9.freebsd.org> <166099893.51.1472451061454.JavaMail.jenkins@jenkins-9.freebsd.org> <CAG=rPVdZp171Egp=OHWDc3qCgcJDE3HQ0rv-j=i%2BO1LHcfH%2BJQ@mail.gmail.com> <CFA236ED-7DE0-4BE1-B944-52284E2FB6E0@FreeBSD.org> <6E443BB8-0269-4812-A2F4-40AA303E69C6@FreeBSD.org> <CAG=rPVdfgoF0mts-edHATUaefD7YuGtNu5ZTJOa8efUn2W4QuA@mail.gmail.com> <8058052E-A09A-403E-828A-74B51ED4BBF4@FreeBSD.org> <20160829163911.GA51650@FreeBSD.cs.nctu.edu.tw> <E73154DF-6A88-457D-B1FF-6B7F7610C37F@FreeBSD.org> <4b8980f0-1a90-40d7-45b3-9569b321d1c6@FreeBSD.org> <20160829175247.GA10263@FreeBSD.cs.nctu.edu.tw> <CAA41D00-2451-42EC-B9FD-3E31F42F9CF6@gmail.com> <31f11ba3-ca29-0f85-f1c1-6a3cd467bb57@FreeBSD.org> <67E84707-3267-49F3-8DB6-13CBD05B1690@gmail.com> <B014DD06-4BB2-4503-8908-C78EFEE0FCA2@gmail.com>
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> On Aug 29, 2016, at 11:04, Ngie Cooper (yaneurabeya) <yaneurabeya@gmail.com> wrote:
>
>>
>> On Aug 29, 2016, at 11:02, Ngie Cooper (yaneurabeya) <yaneurabeya@gmail.com> wrote:
>>
>>>
>>> On Aug 29, 2016, at 11:00, Bryan Drewery <bdrewery@FreeBSD.org> wrote:
>>>
>>> On 8/29/2016 10:58 AM, Ngie Cooper (yaneurabeya) wrote:
>>>> (-bdrewery)
>>>>
>>>>> On Aug 29, 2016, at 10:52, Li-Wen Hsu <lwhsu@FreeBSD.org> wrote:
>>>>>
>>>>> I guess the quickest way is boot that VM, cd to
>>>>> /usr/tests/lib/atf/libatf-c++ and run `kyua test atf_c++_test`
>>>>> However I am not sure this provides enough information because stuff
>>>>> under /usr/tests/lib/atf/libatf-c++ are all binary files.
>>>>>
>>>>> FWIW, I would like to know, should these -target, --sysroot and -B flages be
>>>>> given when compiling a normal program in a normal time? In this test
>>>>> case, kyua just wanted to compile test.cpp which includes sstream, it's
>>>>> not during buildworld/buildkernel time, so files under /usr/obj
>>>>> should not be used.
>>>>
>>>> I’m actively working on this right now. If I can’t resolve it soon, I’ll file a bug, mark it as an expected failure, and we can work on fixing the issue with a bit more leisure.
>>>>
>>>> It’s not a cross-compiler problem — something changed recently (likely in clang/libc++) that’s causing this problem, and it might just be an existing bug that was triggered by that change..
>>>>
>>>
>>> What changed recently is that buildworld now always uses --sysroot for
>>> Clang, and --sysroot,-isystem,-B,-L for GCC.
>>
>> Ok. I’m not fully convinced that that’s the problem yet. Will drill down into the issue in the next half hour and will post a bug with my findings.
>
> Oh wait. Damn… I see the --sysroot line in the compilation output from the test. Crap… that’s not going to work.
Ok, found a likely culprit: lib/clang/include/clang/Config/config.h. DEFAULT_SYSROOT’s probably being stored in the compiler, somehow…
Cheers,
-Ngie
24 /* Default <path> to all compiler invocations for --sysroot=<path>. */
25 /* #undef DEFAULT_SYSROOT */
$ grep -r DEFAULT_SYSROOT lib/clang/
lib/clang/include/clang/Config/config.h:/* #undef DEFAULT_SYSROOT */
lib/clang/clang.build.mk: -DDEFAULT_SYSROOT=\"${TOOLS_PREFIX}\”
$ cc -print-search-dirs
programs: =/usr/bin
libraries: =/usr/bin/../lib/clang/3.8.0:/usr/lib
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