On 2016-04-26 22:48, Nicolas Pitre wrote:
> On Wed, 27 Apr 2016, Stephen Rothwell wrote:
>
>> Hi Nicolas,
>>
>> On Tue, 26 Apr 2016 10:40:57 -0400 (EDT) Nicolas Pitre <nicolas.pitre@xxxxxxxxxx> wrote:
>>>
>>> If you can reproduce this build failure, could you try a make mrproper
>>> and attempt it again? I, too, would like to find an explanation and a
>>> way to reproduce.
>>
>> I reset my build tree to commit 9d67df654092 ("Merge remote-tracking
>> branch 'block/for-next'") and the build failed with:
>>
>> ERROR: ".local_clock" [drivers/vhost/vhost_net.ko] undefined!
>> ERROR: ".local_clock" [drivers/misc/cxl/cxl.ko] undefined!
>>
>> :-(
>>
>> So I did a "make mrproper" and did the build again.
>>
>> That built correctly.
>>
> [...]
>
> OK! After digging and diffing through 750 megabytes of make debug logs
> I finally found the explanation. The if_changed directive is useless
> against phony targets.
>
> @Stephen: could you replace the revert with the patch below in your tree?
>
> @Michal: could you fold the patch below into commit 2441e78b19 in your tree?
I prefer not to overwrite the topic branches unless necessary and I
wanted to credit Stephen, so I committed your patch with a fabricated
commit message and your signoff (since you wanted to fold it into a
patch that you had already signed off).
Michal
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