linux-kernel - [PATCH 0/8] perf build: Support building with Clang

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [thread-next>] [day] [month] [year] [list]

Message-Id: <20250925-perf_build_android_ndk-v1-0-8b35aadde3dc@arm.com>
Date: Thu, 25 Sep 2025 11:26:24 +0100
From: Leo Yan <leo.yan@....com>
To: Arnaldo Carvalho de Melo <acme@...nel.org>, 
 Namhyung Kim <namhyung@...nel.org>, Jiri Olsa <jolsa@...nel.org>, 
 Ian Rogers <irogers@...gle.com>, Adrian Hunter <adrian.hunter@...el.com>, 
 Quentin Monnet <qmo@...nel.org>, Andrii Nakryiko <andrii@...nel.org>, 
 Nathan Chancellor <nathan@...nel.org>, 
 Nick Desaulniers <nick.desaulniers+lkml@...il.com>, 
 Bill Wendling <morbo@...gle.com>, Justin Stitt <justinstitt@...gle.com>, 
 Alexei Starovoitov <ast@...nel.org>, Daniel Borkmann <daniel@...earbox.net>, 
 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>, 
 James Clark <james.clark@...aro.org>
Cc: linux-kernel@...r.kernel.org, linux-perf-users@...r.kernel.org, 
 llvm@...ts.linux.dev, bpf@...r.kernel.org, Leo Yan <leo.yan@....com>
Subject: [PATCH 0/8] perf build: Support building with Clang

This series adds support for building perf with Clang, following the
discussion in [1]. Because the Android NDK uses Clang by default,
enabling Clang builds naturally covers Android as well.

The series is organized as follows:

  - Patches 1–2: Fix two bugs found with Clang.
  - Patches 3–6: Address Clang build warnings. Because these warnings
    do not break the build, no Fixes tag is added to avoid backporting.
  - Patches 7–8: Enable Clang in the Makefile and update the
    documentation.

Testing:

  - Clang 15.0.7 on Ubuntu 22.04.5: native and cross-compiling (aarch64)
  - Clang 18.1.3 on Ubuntu 24.04.2: native and cross-compiling (aarch64)
  - Android NDK r27d (latest LTS): cross-compiling (aarch64)

[1] https://lore.kernel.org/linux-perf-users/20240715143342.52236-1-leo.yan@arm.com/

Signed-off-by: Leo Yan <leo.yan@....com>
---
Leo Yan (8):
      tools build: Align warning options with perf
      perf python: split Clang options when invoking Popen
      bpftool: Conditionally add -Wformat-signedness flag
      perf test coresight: Dismiss clang warning for memcpy thread
      perf test coresight: Dismiss clang warning for thread loop
      perf test coresight: Dismiss clang warning for unroll loop thread
      perf build: Support build with clang
      perf docs: Document building with Clang

 tools/bpf/bpftool/Makefile                         | 12 +++-
 tools/build/feature/Makefile                       |  4 +-
 tools/perf/Documentation/Build.txt                 | 18 +++++
 tools/perf/Documentation/android.txt               | 82 +++-------------------
 tools/perf/Makefile.config                         | 32 ++++++++-
 .../shell/coresight/memcpy_thread/memcpy_thread.c  |  2 +
 .../shell/coresight/thread_loop/thread_loop.c      |  4 +-
 .../unroll_loop_thread/unroll_loop_thread.c        |  4 +-
 tools/perf/util/setup.py                           |  5 +-
 9 files changed, 81 insertions(+), 82 deletions(-)
---
base-commit: c17dda8013495d8132c976cbf349be9949d0fbd1
change-id: 20250915-perf_build_android_ndk-500b53bea895

Best regards,
-- 
Leo Yan <leo.yan@....com>