netdev - Re: [PATCH v4 bpf-next 01/14] bpf: Add resolve_btfids tool to resolve BTF IDs in ELF object

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Date:   Sun, 28 Jun 2020 21:35:13 +0200
From:   Jiri Olsa <jolsa@...hat.com>
To:     Alexei Starovoitov <alexei.starovoitov@...il.com>
Cc:     Yonghong Song <yhs@...com>, Jiri Olsa <jolsa@...nel.org>,
        Alexei Starovoitov <ast@...nel.org>,
        Daniel Borkmann <daniel@...earbox.net>, netdev@...r.kernel.org,
        bpf@...r.kernel.org, Song Liu <songliubraving@...com>,
        Martin KaFai Lau <kafai@...com>,
        David Miller <davem@...hat.com>,
        John Fastabend <john.fastabend@...il.com>,
        Wenbo Zhang <ethercflow@...il.com>,
        KP Singh <kpsingh@...omium.org>,
        Andrii Nakryiko <andriin@...com>,
        Brendan Gregg <bgregg@...flix.com>,
        Florent Revest <revest@...omium.org>,
        Al Viro <viro@...iv.linux.org.uk>
Subject: Re: [PATCH v4 bpf-next 01/14] bpf: Add resolve_btfids tool to
 resolve BTF IDs in ELF object

On Sun, Jun 28, 2020 at 12:09:27PM -0700, Alexei Starovoitov wrote:
> On Fri, Jun 26, 2020 at 02:09:53PM -0700, Yonghong Song wrote:
> > 
> > After applying the whole patch set to my bpf-next tree locally, I cannot
> > build:
> > 
> > -bash-4.4$ make -j100 && make vmlinux
> >   GEN     Makefile
> >   DESCEND  objtool
> >   DESCEND  bpf/resolve_btfids
> > make[4]: *** No rule to make target
> > `/data/users/yhs/work/net-next/tools/bpf/resolve_btfids/fixdep'.  Stop.
> > make[3]: *** [fixdep] Error 2
> > make[2]: *** [bpf/resolve_btfids] Error 2
> > make[1]: *** [tools/bpf/resolve_btfids] Error 2
> > make[1]: *** Waiting for unfinished jobs....
> > make[1]: *** wait: No child processes.  Stop.
> > make: *** [__sub-make] Error 2
> > -bash-4.4$
> > 
> > Any clue what is the possible issue here?
> 
> Same here. After applying patch 1 and 2 it doesn't build for me 
> with the same error as above.
> 
> But if I do:
> cd tools/bpf/resolve_btfids; make; cd -; make
> it works.

I already got this error from 0-day bot.. I tested on fresh
Fedora installs on x86/ppx/arm/s390 archs and all's good

what distros are you guys on? I'm installing debian and
perhaps I'll try some other

thanks,
jirka