netdev - [PATCH bpf-next 0/3] tools: bpftool: improve bpftool build experience

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Message-Id: <20190829105645.12285-1-quentin.monnet@netronome.com>
Date:   Thu, 29 Aug 2019 11:56:42 +0100
From:   Quentin Monnet <quentin.monnet@...ronome.com>
To:     Alexei Starovoitov <ast@...nel.org>,
        Daniel Borkmann <daniel@...earbox.net>
Cc:     bpf@...r.kernel.org, netdev@...r.kernel.org,
        oss-drivers@...ronome.com,
        Quentin Monnet <quentin.monnet@...ronome.com>,
        Lorenz Bauer <lmb@...udflare.com>,
        Ilya Leoshkevich <iii@...ux.ibm.com>,
        Jakub Kicinski <jakub.kicinski@...ronome.com>
Subject: [PATCH bpf-next 0/3] tools: bpftool: improve bpftool build experience

Hi,
This set attempts to make it easier to build bpftool, in particular when
passing a specific output directory. This is a follow-up to the
conversation held last month by Lorenz, Ilya and Jakub [0].

The first patch is a minor fix to bpftool's Makefile, regarding the
retrieval of kernel version (which currently prints a non-relevant make
warning on some invocations).

Second patch improves the Makefile commands to support more "make"
invocations, or to fix building with custom output directory. On Jakub's
suggestion, a script is also added to BPF selftests in order to keep track
of the supported build variants.

At last, third patch is a sligthly modified version of Ilya's fix regarding
libbpf.a appearing twice on the linking command for bpftool.

[0] https://lore.kernel.org/bpf/CACAyw9-CWRHVH3TJ=Tke2x8YiLsH47sLCijdp=V+5M836R9aAA@mail.gmail.com/

Cc: Lorenz Bauer <lmb@...udflare.com>
Cc: Ilya Leoshkevich <iii@...ux.ibm.com>
Cc: Jakub Kicinski <jakub.kicinski@...ronome.com>

Quentin Monnet (3):
  tools: bpftool: ignore make built-in rules for getting kernel version
  tools: bpftool: improve and check builds for different make
    invocations
  tools: bpftool: do not link twice against libbpf.a in Makefile

 tools/bpf/bpftool/Makefile                    |  18 ++-
 tools/testing/selftests/bpf/Makefile          |   3 +-
 .../selftests/bpf/test_bpftool_build.sh       | 137 ++++++++++++++++++
 3 files changed, 149 insertions(+), 9 deletions(-)
 create mode 100755 tools/testing/selftests/bpf/test_bpftool_build.sh

-- 
2.17.1