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 12:09:27 -0700
From:   Alexei Starovoitov <alexei.starovoitov@...il.com>
To:     Yonghong Song <yhs@...com>
Cc:     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 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.