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

Hi Björn,

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

On Thu, 11 Mar 2021 07:47:03 +0100 Björn Töpel [off-list ref] wrote:

On 2021-03-11 01:47, Stephen Rothwell wrote:

quoted

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=_gsndxof84OiqyJxgAHL7_jvpuntovUQ8w@mail.gmail.com/ (local)

quoted

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