On Wed, 27 Apr 2016, Michal Marek wrote:
> 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).
Fine with me.
Nicolas
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