Re: Build failed in Jenkins: v4l-utils #43

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Em Wed, 2 Oct 2019 11:49:20 +0200
Hans Verkuil <hverkuil@xxxxxxxxx> escreveu:

> On 10/2/19 11:36 AM, Mauro Carvalho Chehab wrote:
> > Em Wed, 2 Oct 2019 10:25:02 +0200
> > Hans Verkuil <hverkuil@xxxxxxxxx> escreveu:
> >   
> >> Hi Mauro,
> >>
> >> On 10/2/19 10:16 AM, Jenkins Builder Robot wrote:  
> >>> See <https://builder.linuxtv.org/job/v4l-utils/43/display/redirect?page=changes>
> >>>
> >>> Changes:
> >>>
> >>> [hverkuil-cisco] keytable: add new generated keymaps
> >>>
> >>> [hverkuil-cisco] msg2ctl.pl: add newline after log_msg
> >>>
> >>> [hverkuil-cisco] cec-follower: drop the hardcoded UI commands list
> >>>
> >>> [hverkuil-cisco] cec-ctl/cec-log: use new CEC_OP_UI_CMD defines    
> >>
> >> You need to remove utils/cec-follower/cec-log.h.
> >>
> >> This file was generated but the generated file is now called cec-log-gen.h.
> >> A new cec-log.h was also added to utils/common as a companion to cec-log.cpp.
> >>
> >> Unfortunately, the old cec-log.h clashes with the new cec-log.h. And since
> >> the old cec-log.h was generated and so is not part of the git repo it is
> >> not removed as part of a 'git pull'.
> >>
> >> Anyway, just remove utils/cec-follower/cec-log.h and it compiles again.  
> > 
> > I manually removed the file at the builder and at the slave machines and
> > asked for a new build. The build now succeeded.
> > 
> > That's said, we should really avoid disruptive changes like that, fixing
> > the building system for it to do the right thing, as users of the v4l-utils 
> > will also face the same issue if they update their git trees.
> > 
> > At any time, a clean git update with something similar to:
> > 
> > 	git remote update
> > 	git fetch origin
> > 	git reset --hard origin/master
> > 	./bootstrap.sh
> > 	./configure
> > 	make
> > 
> > should work.
> > 
> > Regards,
> > Mauro
> >   
> 
> Yes, I discovered it too late. That said, I'm not sure what to do about
> it since the old generated file is not under the control of git.
> 
> A 'make distclean' before the 'git fetch' would remove it, but after the
> update it is just an orphaned file.
> 
> I've actually added a 'make distclean' in my daily build scripts.

That's a very bad idea. The builds should check and pinpoint to
regressions at the building system too.

If I understand the problem, you're saying that now cec-log.h depends on
the generated cec-log-gen.h, right?

If so, this could be easily fixable by adding an explicit dependency
rule to the Makefile.am, like:

	cec-log.h: cec-log-gen.h

Thanks,
Mauro



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