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Date: Thu, 10 Oct 2024 09:15:31 -0700
From: Namhyung Kim <namhyung@kernel.org>
To: James Clark <james.clark@linaro.org>
Cc: Arnaldo Carvalho de Melo <arnaldo.melo@gmail.com>,
	Howard Chu <howardchu95@gmail.com>,
	Alan Maguire <alan.maguire@oracle.com>,
	Arnaldo Carvalho de Melo <acme@kernel.org>,
	Ian Rogers <irogers@google.com>,
	Adrian Hunter <adrian.hunter@intel.com>,
	Jiri Olsa <jolsa@kernel.org>, Kan Liang <kan.liang@linux.intel.com>,
	Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
	linux-perf-users <linux-perf-users@vger.kernel.org>
Subject: Re: [PATCH 1/1] perf build: Require at least clang 16.0.6 to build
 BPF skeletons
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In-Reply-To: <5f3f55a8-a378-4e16-8e5b-6fff329e75fd@linaro.org>

On Thu, Oct 10, 2024 at 10:11:35AM +0100, James Clark wrote:
> 
> 
> On 10/10/2024 10:00 am, James Clark wrote:
> > 
> > 
> > On 10/10/2024 2:20 am, Arnaldo Carvalho de Melo wrote:
> > > On Wed, Oct 9, 2024, 10:01 PM Namhyung Kim <namhyung@kernel.org> wrote:
> > > 
> > > > On Tue, Oct 08, 2024 at 12:27:24AM -0700, Howard Chu wrote:
> > > > > Hi Alan, Arnaldo and James,
> > > > > 
> > > > > This problem was solved in [PATCH 0/2] perf trace: Fix support for the
> > > > > new BPF feature in clang 12 (Link:
> > > > > 
> > > > https://lore.kernel.org/linux-perf-users/20241007051414.2995674-1-
> > > > howardchu95@gmail.com/T/#t
> > > > ),
> > > > > sorry I forgot to cc you two.
> > > > > 
> > > > > Alan's thought was correct. Thank you so much! :)
> > > > 
> > > > It'd be great if any of you can test this change.  Now I only have
> > > > machines with clang 16.
> > > > 
> > > 
> > > I'll test this tomorrow.
> > > 
> > > - Arnaldo
> > > 
> > > > 
> > > > Thanks,
> > > > Namhyung
> > > > 
> > > > 
> > > 
> > 
> > Tested with clang 15:
> > 
> > $ sudo perf trace -e write --max-events=100 -- echo hello
> > 
> >    0.000 ( 0.014 ms): echo/834165 write(fd: 1, buf: hello\10, count: 6)
> >                                             =
> > 
> > Tested-by: James Clark <james.clark@linaro.org>
> > 
> 
> Should have left this tag on the actual patch. Will re-post it there.
 
Right, thanks for taking care of this!
Namhyung