linux-kernel - Re: [PATCH v1 6/6] perf build: Enable -Wthread-safety with clang

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Message-ID: <CAM9d7cgd-KsqJNxh_MbX9h4tr8rOtAqKe-t7Qfck0m9pTxWK7w@mail.gmail.com>
Date:   Wed, 17 Aug 2022 23:11:04 -0700
From:   Namhyung Kim <namhyung@...nel.org>
To:     Ian Rogers <irogers@...gle.com>
Cc:     Peter Zijlstra <peterz@...radead.org>,
        Ingo Molnar <mingo@...hat.com>,
        Arnaldo Carvalho de Melo <acme@...nel.org>,
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Subject: Re: [PATCH v1 6/6] perf build: Enable -Wthread-safety with clang

Hi Ian,

On Tue, Aug 16, 2022 at 10:39 PM Ian Rogers <irogers@...gle.com> wrote:
>
> If building with clang then enable -Wthread-safety warnings.

Do you know the minimal supported version for the option?
I'm not sure we have a check for that kind of thing.

Thanks,
Namhyung


>
> Signed-off-by: Ian Rogers <irogers@...gle.com>
> ---
>  tools/perf/Makefile.config | 5 +++++
>  1 file changed, 5 insertions(+)
>
> diff --git a/tools/perf/Makefile.config b/tools/perf/Makefile.config
> index 0661a1cf9855..0ef6f572485d 100644
> --- a/tools/perf/Makefile.config
> +++ b/tools/perf/Makefile.config
> @@ -19,6 +19,11 @@ detected_var = $(shell echo "$(1)=$($(1))" >> $(OUTPUT).config-detected)
>  CFLAGS := $(EXTRA_CFLAGS) $(filter-out -Wnested-externs,$(EXTRA_WARNINGS))
>  HOSTCFLAGS := $(filter-out -Wnested-externs,$(EXTRA_WARNINGS))
>
> +# Enabled Wthread-safety analysis for clang builds.
> +ifeq ($(CC_NO_CLANG), 0)
> +  CFLAGS += -Wthread-safety
> +endif
> +
>  include $(srctree)/tools/scripts/Makefile.arch
>
>  $(call detected_var,SRCARCH)
> --
> 2.37.1.595.g718a3a8f04-goog
>