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From: "Yann E. MORIN" <yann.morin.1998@free.fr>
To: Sergey Matyukevich <geomatsi@gmail.com>
Cc: Thomas Petazzoni <thomas.petazzoni@bootlin.com>, buildroot@buildroot.org
Subject: Re: [Buildroot] [PATCH 1/1] package/linux-tools: perf: add host-python3 dependency
Date: Mon, 5 Sep 2022 22:17:27 +0200	[thread overview]
Message-ID: <20220905201727.GJ1490660@scaer> (raw)
In-Reply-To: <20220904205702.1488199-1-geomatsi@gmail.com>

Sergey, All,

On 2022-09-04 23:57 +0300, Sergey Matyukevich spake thusly:
> Linux kernel commit 00facc760903 ("perf jevents: Switch build to use
> jevents.py")

00facc760903 is only parts of 6.0-rc kernels so far, so unless one uses
bleeding edge technology, there is no issue. So, paying the price of a
host-pytohn3 build just for release-candidate kernels is a bit too much
in my opinion.

So, I added a config knob to drive this, like we have for host-openssl
and a few other host programs for building the kernel.

Applied to master with the above change, thanks.

Regards,
Yann E. MORIN.

> switched to auto-generation of arch-specific PMU events
> using python script. Now custom PMU events for different platforms of
> the selected target architecture are not embedded into perf binary if
> an appropriate host python interpreter is not present. In practice it
> means that perf is successfully built, but 'perf list pmu' will show
> no custom events on a target platform even if those events are supported
> and properly defined in tools/perf/pmu-events/arch/<target arch>
> directory in the kernel source tree.
> 
> Signed-off-by: Sergey Matyukevich <geomatsi@gmail.com>
> ---
>  package/linux-tools/linux-tool-perf.mk.in | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/package/linux-tools/linux-tool-perf.mk.in b/package/linux-tools/linux-tool-perf.mk.in
> index 057c6f80e7..44c1bbdf83 100644
> --- a/package/linux-tools/linux-tool-perf.mk.in
> +++ b/package/linux-tools/linux-tool-perf.mk.in
> @@ -6,7 +6,7 @@
>  
>  LINUX_TOOLS += perf
>  
> -PERF_DEPENDENCIES = host-flex host-bison
> +PERF_DEPENDENCIES = host-flex host-bison host-python3
>  
>  ifeq ($(NORMALIZED_ARCH),x86_64)
>  PERF_ARCH=x86
> -- 
> 2.37.1
> 
> _______________________________________________
> buildroot mailing list
> buildroot@buildroot.org
> https://lists.buildroot.org/mailman/listinfo/buildroot

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  reply	other threads:[~2022-09-05 20:17 UTC|newest]

Thread overview: 7+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2022-09-04 20:57 [Buildroot] [PATCH 1/1] package/linux-tools: perf: add host-python3 dependency Sergey Matyukevich
2022-09-05 20:17 ` Yann E. MORIN [this message]
2022-09-06 19:46   ` Arnout Vandecappelle
2022-09-06 20:07     ` Yann E. MORIN
2022-09-06 20:12       ` Sergey Matyukevich
2022-09-06 20:37       ` Yann E. MORIN
2022-09-07 12:18         ` Arnout Vandecappelle

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