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 13:53:46 -0700
From:   Yonghong Song <yhs@...com>
To:     Jiri Olsa <jolsa@...hat.com>,
        Alexei Starovoitov <alexei.starovoitov@...il.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 6/28/20 12:35 PM, Jiri Olsa wrote:
> 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

My system is:
  CentOS Linux release 7.8.2003 (Core)

> 
> thanks,
> jirka
>