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Groups > linux.kernel > #1533513
| From | Prarit Bhargava <prarit@redhat.com> |
|---|---|
| Newsgroups | linux.kernel |
| Subject | Re: Odd build breakage in 4.9-rc7 |
| Date | 2016-11-30 20:00 +0100 |
| Message-ID | <sJigO-1kn-17@gated-at.bofh.it> (permalink) |
| References | <sJgRI-yy-15@gated-at.bofh.it> <sJhE5-17j-11@gated-at.bofh.it> <sJhNL-1aw-5@gated-at.bofh.it> <sJhXs-1dw-25@gated-at.bofh.it> |
| Organization | linux.* mail to news gateway |
On 11/30/2016 01:36 PM, Linus Torvalds wrote:
> On Wed, Nov 30, 2016 at 10:28 AM, Prarit Bhargava <prarit@redhat.com> wrote:
> ]>
>> In my case I tracked this to commit 3637efb00864 ("x86/mce: Add PCI quirks to
>> identify Xeons with machine check recovery") which adds the include for
>> generated/autoksyms.h.
>
> Ok, that at least makes some sense. The other blamed commit did not
> seem to possibly make a difference.
>
>> Searching LKML and I came across a report from Ken Moffat from a month ago:
>>
>> http://marc.info/?l=linux-kernel&m=147794681124332&w=2
>
> Does a "make clean" get rid of it forever? Or does it come back?
It comes back. The steps to reproduce this are:
1. checkout latest linux.git
2. make -j112
(IOW, it occurs 100% of the time for me on a clean tree.)
To work around the bug I have to do
1. checkout latest linux.git
2. comment out the include for generated/autoksyms.h at include/linux/export.h:81
3. compile with -j112
This fails loudly, but then I do
4. uncomment the include for generated/autoksyms.h at include/linux/export.h:81
5. make -j112
and this completes with a bootable kernel AFAICT.
>
> If it's a one-time dependency issue that is because some header
> dependency addition that the automatic dependency generator hadn't
> caught, that might explain a bisection failure too: once the file
> happens to get rebuilt (and the dependencies re-done), it starts
> working even though the "happens to be rebuilt" had nothing to do with
> the original bug.
Hopefully the linux-kbuild folks might be able to point us in the right
direction for a fix.
P.
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Odd build breakage in 4.9-rc7 Jarod Wilson <jarod@redhat.com> - 2016-11-30 18:30 +0100
Re: Odd build breakage in 4.9-rc7 Linus Torvalds <torvalds@linux-foundation.org> - 2016-11-30 19:20 +0100
Re: Odd build breakage in 4.9-rc7 Prarit Bhargava <prarit@redhat.com> - 2016-11-30 19:30 +0100
Re: Odd build breakage in 4.9-rc7 Linus Torvalds <torvalds@linux-foundation.org> - 2016-11-30 19:40 +0100
Re: Odd build breakage in 4.9-rc7 Prarit Bhargava <prarit@redhat.com> - 2016-11-30 20:00 +0100
Re: Odd build breakage in 4.9-rc7 Jarod Wilson <jarod@redhat.com> - 2016-11-30 20:10 +0100
Re: Odd build breakage in 4.9-rc7 Linus Torvalds <torvalds@linux-foundation.org> - 2016-11-30 20:40 +0100
Re: Odd build breakage in 4.9-rc7 Nicolas Pitre <nicolas.pitre@linaro.org> - 2016-11-30 23:50 +0100
Re: Odd build breakage in 4.9-rc7 Prarit Bhargava <prarit@redhat.com> - 2016-12-01 13:50 +0100
Re: Odd build breakage in 4.9-rc7 Prarit Bhargava <prarit@redhat.com> - 2016-12-01 15:20 +0100
Re: Odd build breakage in 4.9-rc7 Jarod Wilson <jarod@redhat.com> - 2016-12-01 16:30 +0100
Re: Odd build breakage in 4.9-rc7 Nicolas Pitre <nico@fluxnic.net> - 2016-12-01 00:20 +0100
Re: Odd build breakage in 4.9-rc7 Paul Bolle <pebolle@tiscali.nl> - 2016-11-30 22:00 +0100
Re: Odd build breakage in 4.9-rc7 Jarod Wilson <jarod@redhat.com> - 2016-11-30 22:10 +0100
Re: Odd build breakage in 4.9-rc7 Jarod Wilson <jarod@redhat.com> - 2016-11-30 22:40 +0100
Re: Odd build breakage in 4.9-rc7 Paul Bolle <pebolle@tiscali.nl> - 2016-11-30 22:50 +0100
Re: Odd build breakage in 4.9-rc7 Paul Bolle <pebolle@tiscali.nl> - 2016-11-30 23:00 +0100
Re: Odd build breakage in 4.9-rc7 Jarod Wilson <jarod@redhat.com> - 2016-12-01 00:50 +0100
Re: Odd build breakage in 4.9-rc7 Paul Bolle <pebolle@tiscali.nl> - 2016-12-01 10:10 +0100
Re: Odd build breakage in 4.9-rc7 Paul Bolle <pebolle@tiscali.nl> - 2016-12-01 14:50 +0100
Re: Odd build breakage in 4.9-rc7 Nicolas Pitre <nicolas.pitre@linaro.org> - 2016-12-01 18:50 +0100
Re: Odd build breakage in 4.9-rc7 Paul Bolle <pebolle@tiscali.nl> - 2016-12-01 21:20 +0100
Re: Odd build breakage in 4.9-rc7 Nicolas Pitre <nicolas.pitre@linaro.org> - 2016-12-02 21:20 +0100
Re: Odd build breakage in 4.9-rc7 Jarod Wilson <jarod@redhat.com> - 2016-12-02 23:50 +0100
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