linux-kernel - [PATCH 0/3] perf/bpftool: Allow to link libbpf dynamically

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Message-Id: <20191127094837.4045-1-jolsa@kernel.org>
Date:   Wed, 27 Nov 2019 10:48:34 +0100
From:   Jiri Olsa <jolsa@...nel.org>
To:     Arnaldo Carvalho de Melo <acme@...nel.org>
Cc:     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: [PATCH 0/3] perf/bpftool: Allow to link libbpf dynamically

hi,
adding support to link bpftool with libbpf dynamically,
and config change for perf.

It's now possible to use:
  $ make -C tools/bpf/bpftool/ LIBBPF_DYNAMIC=1

which will detect libbpf devel package with needed version,
and if found, link it with bpftool.

It's possible to use arbitrary installed libbpf:
  $ make -C tools/bpf/bpftool/ LIBBPF_DYNAMIC=1 LIBBPF_DIR=/tmp/libbpf/

I based this change on top of Arnaldo's perf/core, because
it contains libbpf feature detection code as dependency.
It's now also synced with latest bpf-next, so Toke's change
applies correctly.

Also available in:
  git://git.kernel.org/pub/scm/linux/kernel/git/jolsa/perf.git
  libbpf/dyn

thanks,
jirka


---
Jiri Olsa (2):
      perf tools: Allow to specify libbpf install directory
      bpftool: Allow to link libbpf dynamically

Toke Høiland-Jørgensen (1):
      libbpf: Export netlink functions used by bpftool

 tools/bpf/bpftool/Makefile        | 40 +++++++++++++++++++++++++++++++++++++++-
 tools/build/feature/test-libbpf.c |  9 +++++++++
 tools/lib/bpf/libbpf.h            | 22 +++++++++++++---------
 tools/lib/bpf/libbpf.map          |  7 +++++++
 tools/lib/bpf/nlattr.h            | 15 ++++++++++-----
 tools/perf/Makefile.config        | 27 ++++++++++++++++++++-------
 6 files changed, 98 insertions(+), 22 deletions(-)