linux-kernel - [PATCH v3 0/3] bpftool: Fix the static linkage failure

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Message-Id: <20241215221223.293205-1-leo.yan@arm.com>
Date: Sun, 15 Dec 2024 22:12:20 +0000
From: Leo Yan <leo.yan@....com>
To: Arnaldo Carvalho de Melo <acme@...nel.org>,
	Quentin Monnet <qmo@...nel.org>,
	Alexei Starovoitov <ast@...nel.org>,
	Daniel Borkmann <daniel@...earbox.net>,
	Andrii Nakryiko <andrii@...nel.org>,
	Martin KaFai Lau <martin.lau@...ux.dev>,
	Eduard Zingerman <eddyz87@...il.com>,
	Song Liu <song@...nel.org>,
	Yonghong Song <yonghong.song@...ux.dev>,
	John Fastabend <john.fastabend@...il.com>,
	KP Singh <kpsingh@...nel.org>,
	Stanislav Fomichev <sdf@...ichev.me>,
	Hao Luo <haoluo@...gle.com>,
	Jiri Olsa <jolsa@...nel.org>,
	Nick Terrell <terrelln@...com>,
	Namhyung Kim <namhyung@...nel.org>,
	Ian Rogers <irogers@...gle.com>,
	Adrian Hunter <adrian.hunter@...el.com>,
	"Liang, Kan" <kan.liang@...ux.intel.com>,
	James Clark <james.clark@...aro.org>,
	Guilherme Amadio <amadio@...too.org>,
	linux-kernel@...r.kernel.org,
	bpf@...r.kernel.org,
	linux-perf-users@...r.kernel.org
Cc: Leo Yan <leo.yan@....com>
Subject: [PATCH v3 0/3] bpftool: Fix the static linkage failure

This series follows up on the discussion in [1] for fixing the static
linkage issue in bpftool.

Patch 01 introduces a new feature for libelf-zstd.  If this feature
is detected, it means the zstd lib is required by libelf.

Patch 02 is a minor improvement for linking the zstd lib in the perf.

Patch 03 fixes the static build failure by linking the zstd lib when
the feature-libelf-zstd is detected.

[1] https://lore.kernel.org/linux-perf-users/Z1H9-9xrWM4FBbNI@mini-arch/T/#m2300b127424e9e2ace7da497a20d88534eb6866f

Changes from v2:
- Refined commit log in patch 01 for recording info that from which
  libelf version it requires to link libzstd. (Quentin)
- Removed to display feature 'libelf-zstd' in bpftool. (Quentin)
- Added Test and Ack tags. Thanks all! (Quentin/Jiri/Namhyung/Andrii)


Leo Yan (3):
  tools build: Add feature test for libelf with ZSTD
  perf: build: Minor improvement for linking libzstd
  bpftool: Link zstd lib required by libelf

 tools/bpf/bpftool/Makefile             | 7 +++++++
 tools/build/Makefile.feature           | 1 +
 tools/build/feature/Makefile           | 4 ++++
 tools/build/feature/test-all.c         | 4 ++++
 tools/build/feature/test-libelf-zstd.c | 9 +++++++++
 tools/perf/Makefile.config             | 8 +++++++-
 6 files changed, 32 insertions(+), 1 deletion(-)
 create mode 100644 tools/build/feature/test-libelf-zstd.c

-- 
2.34.1