netdev - Re: [PATCH 3/3] bpftool: Allow to link libbpf dynamically

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Date:   Wed, 27 Nov 2019 12:59:36 -0300
From:   Arnaldo Carvalho de Melo <arnaldo.melo@...il.com>
To:     Quentin Monnet <quentin.monnet@...ronome.com>
Cc:     Arnaldo Carvalho de Melo <arnaldo.melo@...il.com>,
        Jiri Olsa <jolsa@...hat.com>, Jiri Olsa <jolsa@...nel.org>,
        lkml <linux-kernel@...r.kernel.org>, netdev@...r.kernel.org,
        bpf@...r.kernel.org, Ingo Molnar <mingo@...nel.org>,
        Namhyung Kim <namhyung@...nel.org>,
        Alexander Shishkin <alexander.shishkin@...ux.intel.com>,
        Peter Zijlstra <a.p.zijlstra@...llo.nl>,
        Michael Petlan <mpetlan@...hat.com>,
        Toke Høiland-Jørgensen <toke@...hat.com>,
        Jesper Dangaard Brouer <brouer@...hat.com>,
        Daniel Borkmann <daniel@...earbox.net>,
        Alexei Starovoitov <alexei.starovoitov@...il.com>,
        Martin KaFai Lau <kafai@...com>,
        Song Liu <songliubraving@...com>, Yonghong Song <yhs@...com>,
        Andrii Nakryiko <andriin@...com>
Subject: Re: [PATCH 3/3] bpftool: Allow to link libbpf dynamically

Em Wed, Nov 27, 2019 at 03:52:06PM +0000, Quentin Monnet escreveu:
> 2019-11-27 12:48 UTC-0300 ~ Arnaldo Carvalho de Melo <arnaldo.melo@...il.com>
> > Em Wed, Nov 27, 2019 at 02:31:31PM +0000, Quentin Monnet escreveu:
> >> 2019-11-27 11:24 UTC-0300 ~ Arnaldo Carvalho de Melo <arnaldo.melo@...il.com>
> >>> Em Wed, Nov 27, 2019 at 03:15:20PM +0100, Jiri Olsa escreveu:
> >>>> On Wed, Nov 27, 2019 at 01:38:55PM +0000, Quentin Monnet wrote:
> >>>>> 2019-11-27 10:48 UTC+0100 ~ Jiri Olsa <jolsa@...nel.org>
> >>>>> On the plus side, all build attempts from
> >>>>> tools/testing/selftests/bpf/test_bpftool_build.sh pass successfully on
> >>>>> my setup with dynamic linking from your branch.

> >>>> cool, had no idea there was such test ;-)

> >>> Should be the the equivalent to 'make -C tools/perf build-test' :-)

> >>> Perhaps we should make tools/testing/selftests/perf/ link to that?

> >> It is already run as part of the bpf selftests, so probably no need.

> > You mean 'make -C tools/perf build-test' is run from the bpf selftests?

> Ah, no, sorry for the confusion. I meant that test_bpftool_build.sh is
> run from the bpf selftests.

> I am not familiar with perf build-test, but maybe that's something worth
> adding to perf selftests indeed.

Yeah, I think is worth considering plugging perf's build-test to
selftests, if only to expose it to the people that are used with
selftests and may start testing perf builds more regularly.

- Arnaldo