linux-kernel - Re: [PATCH v2 0/8] perf build: Support building with Clang

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Message-ID: <aN0wgvAsKh0n4sL4@x1>
Date: Wed, 1 Oct 2025 10:45:38 -0300
From: Arnaldo Carvalho de Melo <acme@...nel.org>
To: Ian Rogers <irogers@...gle.com>
Cc: Leo Yan <leo.yan@....com>, 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 v2 0/8] perf build: Support building with Clang

On Tue, Sep 30, 2025 at 11:14:30AM -0700, Ian Rogers wrote:
> On Tue, Sep 30, 2025 at 9:55 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 3–6: 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)
> >
> > [1] https://lore.kernel.org/linux-perf-users/20240715143342.52236-1-leo.yan@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
> 
> Reviewed-by: Ian Rogers <irogers@...gle.com>

Thanks, applied to perf-tools-next,

- Arnaldo