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Message-ID: <CAP-5=fWiivp_zFdos_4VC7RUuzd5NqYrtLH2DR2LKj9Qp9h5BQ@mail.gmail.com> Date: Mon, 6 Oct 2025 10:57:59 -0700 From: Ian Rogers <irogers@...gle.com> To: Leo Yan <leo.yan@....com> Cc: Arnaldo Carvalho de Melo <acme@...nel.org>, Namhyung Kim <namhyung@...nel.org>, Jiri Olsa <jolsa@...nel.org>, Adrian Hunter <adrian.hunter@...el.com>, Nathan Chancellor <nathan@...nel.org>, Nick Desaulniers <nick.desaulniers+lkml@...il.com>, Bill Wendling <morbo@...gle.com>, Justin Stitt <justinstitt@...gle.com>, Paul Walmsley <paul.walmsley@...ive.com>, Palmer Dabbelt <palmer@...belt.com>, Albert Ou <aou@...s.berkeley.edu>, Alexandre Ghiti <alex@...ti.fr>, James Clark <james.clark@...aro.org>, linux-kernel@...r.kernel.org, linux-perf-users@...r.kernel.org, llvm@...ts.linux.dev, linux-riscv@...ts.infradead.org Subject: Re: [PATCH v3 0/9] perf build: Support building with Clang On Mon, Oct 6, 2025 at 9:21 AM Leo Yan <leo.yan@....com> wrote: > > 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 3~7: Correct CROSS_ARCH, Disable thread safety analysis for > perl header, and dismiss Clang build warnings. > - Patches 8~9: Enable Clang in the Makefile and update the > documentation. > > Testing: > > Tested with linux-tools-container-builds [2], which based on Arnaldo's > build test container but with several fixes for cross building with > Clang: > > - All clang native builds on x86_64 have passed. > - The cross builds for arm64/mips/mips64/mipsel/riscv64 have passed. > > Only a pity thing is I cannot build successfully with clang for > ubuntu:20.04-x-powerpc64el (in below log, it only builds with GCC). > The cross config does not work well on Ubuntu 20.04 due to failure > "No gnu/libc-version.h found, please install glibc-dev[el]". I confirmed > that powerpc64el cross build can make success on Ubuntu 24.04, the > failure on Ubuntu 20.04 should not be caused by perf build. > > Subject: tools build test for http://localhost/perf/perf-6.17.0-rc6.tar.xz > > 1 201.44 alpine:3.16 : Ok gcc (Alpine 11.2.1_git20220219) 11.2.1 20220219 , Alpine clang version 13.0.1 flex 2.6.4 > 2 154.82 alpine:3.17 : Ok gcc (Alpine 12.2.1_git20220924-r4) 12.2.1 20220924 , Alpine clang version 15.0.7 flex 2.6.4 > 3 136.07 alpine:3.18 : Ok gcc (Alpine 12.2.1_git20220924-r10) 12.2.1 20220924 , Alpine clang version 16.0.6 flex 2.6.4 > 4 150.21 alpine:3.19 : Ok gcc (Alpine 13.2.1_git20231014) 13.2.1 20231014 , Alpine clang version 17.0.5 flex 2.6.4 > 5 143.50 alpine:3.20 : Ok gcc (Alpine 13.2.1_git20240309) 13.2.1 20240309 , Alpine clang version 17.0.6 flex 2.6.4 > 6 146.08 amazonlinux:2023 : Ok gcc (GCC) 11.5.0 20240719 (Red Hat 11.5.0-5) , clang version 15.0.7 (AWS 15.0.7-3.amzn2023.0.4) flex 2.6.4 > 7 147.19 amazonlinux:devel : Ok gcc (GCC) 11.3.1 20221121 (Red Hat 11.3.1-4) , clang version 15.0.6 (Amazon Linux 15.0.6-3.amzn2023.0.2) flex 2.6.4 > 8 117.92 debian:11 : Ok gcc (Debian 10.2.1-6) 10.2.1 20210110 , Debian clang version 13.0.1-6~deb11u1 flex 2.6.4 > 9 121.54 debian:12 : Ok gcc (Debian 12.2.0-14+deb12u1) 12.2.0 , Debian clang version 14.0.6 flex 2.6.4 > 10 128.64 debian:experimental : Ok gcc (Debian 15.2.0-4) 15.2.0 , Debian clang version 19.1.7 (7) flex 2.6.4 > 11 96.47 debian:experimental-x-arm64 : Ok aarch64-linux-gnu-gcc (Debian 15.2.0-4) 15.2.0 , Debian clang version 19.1.7 (7) flex 2.6.4 > 12 72.89 debian:experimental-x-mips : Ok mips-linux-gnu-gcc (Debian 14.2.0-13) 14.2.0 , Debian clang version 19.1.7 (7) flex 2.6.4 > 13 73.31 debian:experimental-x-mips64 : Ok mips64-linux-gnuabi64-gcc (Debian 14.2.0-13) 14.2.0 , Debian clang version 19.1.7 (7) flex 2.6.4 > 14 71.69 debian:experimental-x-mipsel : Ok mipsel-linux-gnu-gcc (Debian 14.2.0-13) 14.2.0 , Debian clang version 19.1.7 (7) flex 2.6.4 > 15 151.92 fedora:35 : Ok gcc (GCC) 11.3.1 20220421 (Red Hat 11.3.1-3) , clang version 13.0.1 (Fedora 13.0.1-1.fc35) flex 2.6.4 > 16 146.99 fedora:36 : Ok gcc (GCC) 12.2.1 20221121 (Red Hat 12.2.1-4) , clang version 14.0.5 (Fedora 14.0.5-2.fc36) flex 2.6.4 > 17 139.58 fedora:37 : Ok gcc (GCC) 12.3.1 20230508 (Red Hat 12.3.1-1) , clang version 15.0.7 (Fedora 15.0.7-2.fc37) flex 2.6.4 > 18 142.00 fedora:38 : Ok gcc (GCC) 13.2.1 20240316 (Red Hat 13.2.1-7) , clang version 16.0.6 (Fedora 16.0.6-4.fc38) flex 2.6.4 > 19 140.18 fedora:39 : Ok gcc (GCC) 13.3.1 20240913 (Red Hat 13.3.1-3) , clang version 17.0.6 (Fedora 17.0.6-2.fc39) flex 2.6.4 > 20 139.38 fedora:40 : Ok gcc (GCC) 14.2.1 20240912 (Red Hat 14.2.1-3) , clang version 18.1.8 (Fedora 18.1.8-2.fc40) flex 2.6.4 > 21 136.26 fedora:41 : Ok gcc (GCC) 14.3.1 20250808 (Red Hat 14.3.1-3) , clang version 19.1.7 (Fedora 19.1.7-5.fc41) flex 2.6.4 > 22 135.38 fedora:42 : Ok gcc (GCC) 15.2.1 20250808 (Red Hat 15.2.1-1) , clang version 20.1.8 (Fedora 20.1.8-4.fc42) flex 2.6.4 > 23 127.55 fedora:rawhide : Ok gcc (GCC) 15.2.1 20250924 (Red Hat 15.2.1-2) , clang version 21.1.2 (Fedora 21.1.2-1.fc44) flex 2.6.4 > 24 180.17 opensuse:15.4 : Ok gcc (SUSE Linux) 7.5.0 , clang version 15.0.7 flex 2.6.4 > 25 169.40 opensuse:15.5 : Ok gcc (SUSE Linux) 7.5.0 , clang version 15.0.7 flex 2.6.4 > 26 167.36 opensuse:15.6 : Ok gcc (SUSE Linux) 7.5.0 , clang version 17.0.6 flex 2.6.4 > 27 154.82 opensuse:tumbleweed : Ok gcc (SUSE Linux) 15.2.0 , clang version 21.1.2 flex 2.6.4 > 28 145.89 oraclelinux:8 : Ok gcc (GCC) 8.5.0 20210514 (Red Hat 8.5.0-28.0.1) , clang version 19.1.7 ( 19.1.7-2.module+el8.10.0+90583+7e562d96) flex 2.6.1 > 29 139.68 oraclelinux:9 : Ok gcc (GCC) 11.5.0 20240719 (Red Hat 11.5.0-5.0.1) , clang version 19.1.7 ( 19.1.7-2.el9) flex 2.6.4 > 30 40.17 ubuntu:20.04 : Ok gcc (Ubuntu 9.4.0-1ubuntu1~20.04.2) 9.4.0 flex 2.6.4 > 31 20.83 ubuntu:20.04-x-powerpc64el : Ok powerpc64le-linux-gnu-gcc (Ubuntu 10.5.0-1ubuntu1~20.04) 10.5.0 flex 2.6.4 > 32 127.75 ubuntu:22.04 : Ok gcc (Ubuntu 11.4.0-1ubuntu1~22.04.2) 11.4.0 , Ubuntu clang version 14.0.0-1ubuntu1.1 flex 2.6.4 > 33 92.25 ubuntu:22.04-x-riscv64 : Ok riscv64-linux-gnu-gcc (Ubuntu 11.4.0-1ubuntu1~22.04) 11.4.0 , Ubuntu clang version 14.0.0-1ubuntu1.1 flex 2.6.4 > 34 126.64 ubuntu:24.04 : Ok gcc (Ubuntu 13.3.0-6ubuntu2~24.04) 13.3.0 , Ubuntu clang version 18.1.3 (1ubuntu1) flex 2.6.4 > 35 130.95 ubuntu:25.04 : Ok gcc (Ubuntu 14.2.0-19ubuntu2) 14.2.0 , Ubuntu clang version 20.1.2 (0ubuntu1) flex 2.6.4 > > [1] https://lore.kernel.org/linux-perf-users/20240715143342.52236-1-leo.yan@arm.com/ > [2] https://github.com/Leo-Yan/linux-tools-container-builds/tree/fix-riscv64-cross-build > > --- > Changes in v3: > - Fixed build failure with musl lib. > - Disabled thread safety analysis for perl head. > - Link to v2: https://lore.kernel.org/r/20250930-perf_build_android_ndk-v2-0-2ea440b7ef01@arm.com > > Changes in v2: > - Dropped the patch for dismissing warning in bpftool. > - Refined the document. (Ian) > - Link to v1: https://lore.kernel.org/r/20250925-perf_build_android_ndk-v1-0-8b35aadde3dc@arm.com For the series: Reviewed-by: Ian Rogers <irogers@...gle.com> Thanks, Ian > --- > Leo Yan (9): > tools build: Align warning options with perf > perf python: split Clang options when invoking Popen > perf build: Correct CROSS_ARCH for clang > perf build: Disable thread safety analysis for perl header > 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/build/feature/Makefile | 6 +- > tools/perf/Documentation/Build.txt | 15 ++++ > tools/perf/Documentation/android.txt | 80 ++-------------------- > tools/perf/Makefile.config | 33 ++++++++- > tools/perf/Makefile.perf | 2 +- > tools/perf/scripts/perl/Perf-Trace-Util/Build | 2 +- > .../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/scripting-engines/Build | 2 +- > tools/perf/util/setup.py | 5 +- > 11 files changed, 70 insertions(+), 85 deletions(-) > --- > base-commit: c17dda8013495d8132c976cbf349be9949d0fbd1 > change-id: 20250915-perf_build_android_ndk-500b53bea895 > > Best regards, > -- > Leo Yan <leo.yan@....com> >
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