Subject: Re: linux-next: build failure after merge of the bpf-next tree

From: Stephen Rothwell <[email-masked]>
Date: Fri, 12 Mar 2021 12:00:14 +1100

Hi Björn,

[Cc'ing a few (maybe) interested parties]

On Thu, 11 Mar 2021 07:47:03 +0100 Björn Töpel <[email-masked]> wrote:
>
> On 2021-03-11 01:47, Stephen Rothwell wrote:
> > 
> > After merging the bpf-next tree, today's linux-next build (perf) failed
> > like this:
> > 
> > make[3]: *** No rule to make target 'libbpf_util.h', needed by '/home/sfr/next/perf/staticobjs/xsk.o'.  Stop.
> 
> It's an incremental build issue, as pointed out here [1], that is
> resolved by cleaning the build.

Does this mean there is a deficiency in the dependencies in our build system?

> [1] https://lore.kernel.org/bpf/CAEf4BzYPDF87At4=[email-masked]/
> 
> > Caused by commit
> > 
> >    7e8bbe24cb8b ("libbpf: xsk: Move barriers from libbpf_util.h to xsk.h")
> > 
> > I have used the bpf tree from next-20210310 for today.

I have set my system to remove the object directory before building
after merging the bpf-next tree for now.

-- 
Cheers,
Stephen Rothwell