From: Leo Yan <leo.yan@arm.com>
To: Arnaldo Carvalho de Melo <acme@kernel.org>
Cc: Namhyung Kim <namhyung@kernel.org>, Jiri Olsa <jolsa@kernel.org>,
Ian Rogers <irogers@google.com>,
Adrian Hunter <adrian.hunter@intel.com>,
Nathan Chancellor <nathan@kernel.org>,
Nick Desaulniers <nick.desaulniers+lkml@gmail.com>,
Bill Wendling <morbo@google.com>,
Justin Stitt <justinstitt@google.com>,
Paul Walmsley <paul.walmsley@sifive.com>,
Palmer Dabbelt <palmer@dabbelt.com>,
Albert Ou <aou@eecs.berkeley.edu>,
Alexandre Ghiti <alex@ghiti.fr>,
James Clark <james.clark@linaro.org>,
linux-kernel@vger.kernel.org, linux-perf-users@vger.kernel.org,
llvm@lists.linux.dev, linux-riscv@lists.infradead.org
Subject: Re: [PATCH v2 0/8] perf build: Support building with Clang
Date: Wed, 1 Oct 2025 16:22:17 +0100 [thread overview]
Message-ID: <20251001152217.GQ7985@e132581.arm.com> (raw)
In-Reply-To: <aN044EY-Ds9-E6iz@x1>
On Wed, Oct 01, 2025 at 11:21:20AM -0300, Arnaldo Carvalho de Melo wrote:
> On Tue, Sep 30, 2025 at 05:54:48PM +0100, Leo Yan 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 3–6: Correct CROSS_ARCH and dismiss Clang build warnings.
> > - 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)
>
> LD /tmp/build/perf/util/perf-util-in.o
> LD /tmp/build/perf/perf-util-in.o
> AR /tmp/build/perf/libperf-util.a
> CC /tmp/build/perf/pmu-events/pmu-events.o
> LD /tmp/build/perf/pmu-events/pmu-events-in.o
> AR /tmp/build/perf/libpmu-events.a
> LINK /tmp/build/perf/perf
> make: Leaving directory '/git/perf-6.17.0-rc6/tools/perf'
> + rm -rf /tmp/build/perf
> + mkdir /tmp/build/perf
> + make 'ARCH=' 'CROSS_COMPILE=' 'EXTRA_CFLAGS=' -C tools/perf 'O=/tmp/build/perf' 'CC=clang'
> make: Entering directory '/git/perf-6.17.0-rc6/tools/perf'
> BUILD: Doing 'make -j28' parallel build
> Makefile.config:494: *** No gnu/libc-version.h found, please install glibc-dev[el]. Stop.
> make[1]: *** [Makefile.perf:289: sub-make] Error 2
> make: *** [Makefile:76: all] Error 2
> make: Leaving directory '/git/perf-6.17.0-rc6/tools/perf'
> + exit 1
> toolsbuilder@five:~$ cat dm.log/alpine\:3.22
A quick look: the build cannot find both libelf (feature-libelf=0) and
glibc (feature-glibc=0), thus lead to build failure. It is good to
know what the reason for the feature building failures:
tools/perf/feature/test-libelf.make.output
tools/perf/feature/test-glibc.make.output
I am not surprised for the failure of libelf (this is common case
that the package is not installed by default in a distro), but it is a
bit confused for the glibc feature failure.
It seems the issue occurs on Alpine 3.22, but the highest version
supported in container-build is 3.21 [1]. Could you confirm whether
the issue reproduces on other distros or versions?
Thanks,
Leo
[1] https://github.com/acmel/linux-tools-container-builds/tree/main/alpine
next prev parent reply other threads:[~2025-10-01 15:22 UTC|newest]
Thread overview: 17+ messages / expand[flat|nested] mbox.gz Atom feed top
2025-09-30 16:54 [PATCH v2 0/8] perf build: Support building with Clang Leo Yan
2025-09-30 16:54 ` [PATCH v2 1/8] tools build: Align warning options with perf Leo Yan
2025-09-30 16:54 ` [PATCH v2 2/8] perf python: split Clang options when invoking Popen Leo Yan
2025-09-30 16:54 ` [PATCH v2 3/8] perf: build: Correct CROSS_ARCH for clang Leo Yan
2025-09-30 16:54 ` [PATCH v2 4/8] perf test coresight: Dismiss clang warning for memcpy thread Leo Yan
2025-09-30 16:54 ` [PATCH v2 5/8] perf test coresight: Dismiss clang warning for thread loop Leo Yan
2025-09-30 16:54 ` [PATCH v2 6/8] perf test coresight: Dismiss clang warning for unroll loop thread Leo Yan
2025-09-30 16:54 ` [PATCH v2 7/8] perf build: Support build with clang Leo Yan
2025-09-30 16:54 ` [PATCH v2 8/8] perf docs: Document building with Clang Leo Yan
2025-09-30 18:14 ` [PATCH v2 0/8] perf build: Support " Ian Rogers
2025-10-01 13:45 ` Arnaldo Carvalho de Melo
2025-10-01 14:21 ` Arnaldo Carvalho de Melo
2025-10-01 15:22 ` Leo Yan [this message]
2025-10-01 18:25 ` Arnaldo Carvalho de Melo
2025-10-01 18:32 ` Leo Yan
2025-10-01 20:20 ` Leo Yan
2025-10-02 17:43 ` Arnaldo Carvalho de Melo
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20251001152217.GQ7985@e132581.arm.com \
--to=leo.yan@arm.com \
--cc=acme@kernel.org \
--cc=adrian.hunter@intel.com \
--cc=alex@ghiti.fr \
--cc=aou@eecs.berkeley.edu \
--cc=irogers@google.com \
--cc=james.clark@linaro.org \
--cc=jolsa@kernel.org \
--cc=justinstitt@google.com \
--cc=linux-kernel@vger.kernel.org \
--cc=linux-perf-users@vger.kernel.org \
--cc=linux-riscv@lists.infradead.org \
--cc=llvm@lists.linux.dev \
--cc=morbo@google.com \
--cc=namhyung@kernel.org \
--cc=nathan@kernel.org \
--cc=nick.desaulniers+lkml@gmail.com \
--cc=palmer@dabbelt.com \
--cc=paul.walmsley@sifive.com \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).