linux-kernel - Re: [PATCH v1 2/5] perf pmu-events: Change dependencies for empty-pmu-events.c test

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Message-ID: <ZrEwE1bzUsfC6Wfl@x1>
Date: Mon, 5 Aug 2024 17:03:31 -0300
From: Arnaldo Carvalho de Melo <acme@...nel.org>
To: Ian Rogers <irogers@...gle.com>
Cc: Peter Zijlstra <peterz@...radead.org>, Ingo Molnar <mingo@...hat.com>,
	Namhyung Kim <namhyung@...nel.org>,
	Mark Rutland <mark.rutland@....com>,
	Alexander Shishkin <alexander.shishkin@...ux.intel.com>,
	Jiri Olsa <jolsa@...nel.org>,
	Adrian Hunter <adrian.hunter@...el.com>,
	Kan Liang <kan.liang@...ux.intel.com>,
	John Garry <john.g.garry@...cle.com>, Will Deacon <will@...nel.org>,
	James Clark <james.clark@...aro.org>,
	Mike Leach <mike.leach@...aro.org>, Leo Yan <leo.yan@...ux.dev>,
	Paul Walmsley <paul.walmsley@...ive.com>,
	Palmer Dabbelt <palmer@...belt.com>,
	Albert Ou <aou@...s.berkeley.edu>,
	Samuel Holland <samuel.holland@...ive.com>,
	Charles Ci-Jyun Wu <dminus@...estech.com>,
	Locus Wei-Han Chen <locus84@...estech.com>,
	Atish Patra <atishp@...osinc.com>,
	Ji Sheng Teoh <jisheng.teoh@...rfivetech.com>,
	Inochi Amaoto <inochiama@...look.com>,
	Jing Zhang <renyu.zj@...ux.alibaba.com>,
	Xu Yang <xu.yang_2@....com>, Sandipan Das <sandipan.das@....com>,
	Guilherme Amadio <amadio@...too.org>,
	Changbin Du <changbin.du@...wei.com>,
	linux-perf-users@...r.kernel.org, linux-kernel@...r.kernel.org,
	linux-arm-kernel@...ts.infradead.org,
	linux-riscv@...ts.infradead.org, vincent.chen@...ive.com,
	greentime.hu@...ive.com, Eric Lin <eric.lin@...ive.com>
Subject: Re: [PATCH v1 2/5] perf pmu-events: Change dependencies for
 empty-pmu-events.c test

On Mon, Aug 05, 2024 at 12:44:21PM -0700, Ian Rogers wrote:
> Switch from $? (all the prerequisites that are newer than the target)
> to $^ (all the prerequisites) as touching jevents.py will mean that
> empty-pmu-events.c won't be passed to the diff command breaking the
> build.

Thanks, added:

Reported-by: Arnaldo Carvalho de Melo <acme@...hat.com>
Tested-by: Arnaldo Carvalho de Melo <acme@...hat.com>
 
> Signed-off-by: Ian Rogers <irogers@...gle.com>
> ---
>  tools/perf/pmu-events/Build | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/tools/perf/pmu-events/Build b/tools/perf/pmu-events/Build
> index c3fa43c49706..d941bc9d16e9 100644
> --- a/tools/perf/pmu-events/Build
> +++ b/tools/perf/pmu-events/Build
> @@ -39,7 +39,7 @@ $(TEST_EMPTY_PMU_EVENTS_C): $(JSON) $(JSON_TEST) $(JEVENTS_PY) $(METRIC_PY) $(ME
>  
>  $(EMPTY_PMU_EVENTS_TEST_LOG): $(EMPTY_PMU_EVENTS_C) $(TEST_EMPTY_PMU_EVENTS_C)
>  	$(call rule_mkdir)
> -	$(Q)$(call echo-cmd,test)diff -u $? 2> $@ || (cat $@ && false)
> +	$(Q)$(call echo-cmd,test)diff -u $^ 2> $@ || (cat $@ && false)
>  
>  $(PMU_EVENTS_C): $(JSON) $(JSON_TEST) $(JEVENTS_PY) $(METRIC_PY) $(METRIC_TEST_LOG) $(EMPTY_PMU_EVENTS_TEST_LOG)
>  	$(call rule_mkdir)
> -- 
> 2.46.0.rc2.264.g509ed76dc8-goog
>