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Date:   Fri, 26 Mar 2021 12:18:08 +1100
From:   Stephen Rothwell <sfr@canb.auug.org.au>
To:     =?UTF-8?B?QmrDtnJuIFTDtnBlbA==?= <bjorn.topel@intel.com>
Cc:     Daniel Borkmann <daniel@iogearbox.net>,
        Alexei Starovoitov <ast@kernel.org>,
        Networking <netdev@vger.kernel.org>,
        Andrii Nakryiko <andrii@kernel.org>,
        =?UTF-8?B?QmrDtnJuIFTDtnBlbA==?= <bjorn@kernel.org>,
        Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
        Linux Next Mailing List <linux-next@vger.kernel.org>,
        David Miller <davem@davemloft.net>,
        Jakub Kicinski <kuba@kernel.org>,
        Masahiro Yamada <masahiroy@kernel.org>
Subject: Re: linux-next: build failure after merge of the bpf-next tree
Message-ID: <20210326121808.2da7ac74@canb.auug.org.au>
In-Reply-To: <20210312120014.62ced6dd@canb.auug.org.au>
References: <20210311114723.352e12f8@canb.auug.org.au>
        <bad04c3d-c80e-16c1-0f5a-4d4556555a81@intel.com>
        <20210312120014.62ced6dd@canb.auug.org.au>
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Hi all,

On Fri, 12 Mar 2021 12:00:14 +1100 Stephen Rothwell <sfr@canb.auug.org.au> =
wrote:
>
> [Cc'ing a few (maybe) interested parties]
>=20
> On Thu, 11 Mar 2021 07:47:03 +0100 Bj=C3=B6rn T=C3=B6pel <bjorn.topel@int=
el.com> wrote:
> >
> > On 2021-03-11 01:47, Stephen Rothwell wrote: =20
> > >=20
> > > After merging the bpf-next tree, today's linux-next build (perf) fail=
ed
> > > like this:
> > >=20
> > > make[3]: *** No rule to make target 'libbpf_util.h', needed by '/home=
/sfr/next/perf/staticobjs/xsk.o'.  Stop. =20
> >=20
> > It's an incremental build issue, as pointed out here [1], that is
> > resolved by cleaning the build. =20
>=20
> Does this mean there is a deficiency in the dependencies in our build sys=
tem?
>=20
> > [1] https://lore.kernel.org/bpf/CAEf4BzYPDF87At4=3D_gsndxof84OiqyJxgAHL=
7_jvpuntovUQ8w@mail.gmail.com/
> >  =20
> > > Caused by commit
> > >=20
> > >    7e8bbe24cb8b ("libbpf: xsk: Move barriers from libbpf_util.h to xs=
k.h")
> > >=20
> > > I have used the bpf tree from next-20210310 for today. =20
>=20
> I have set my system to remove the object directory before building
> after merging the bpf-next tree for now.

I now get this build failure after I merge the net-next tree :-(

--=20
Cheers,
Stephen Rothwell

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