From 29166bd0a41fe6bdcf0b2376ef57e358c8a1e988 Mon Sep 17 00:00:00 2001 From: James Clark Date: Mon, 20 Oct 2025 17:08:28 +0100 Subject: [PATCH] perf jevents: Suppress circular dependency warnings When doing an in source build, $(OUTPUT) is empty so the rule has the same input and output file. Suppress the warning by only adding the rule when doing an out of source build. The same condition already exists for the clean rule for json files. This fixes the following warnings: make[3]: Circular pmu-events/arch/nds32/mapfile.csv <- pmu-events/arch/nds32/mapfile.csv dependency dropped. make[3]: Circular pmu-events/arch/powerpc/mapfile.csv <- pmu-events/arch/powerpc/mapfile.csv dependency dropped. ... Signed-off-by: James Clark Tested-by: Namhyung Kim Tested-by: Leo Yan Signed-off-by: Namhyung Kim --- tools/perf/pmu-events/Build | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) diff --git a/tools/perf/pmu-events/Build b/tools/perf/pmu-events/Build index c5e2d5f137668..a46ab7b612dfc 100644 --- a/tools/perf/pmu-events/Build +++ b/tools/perf/pmu-events/Build @@ -29,10 +29,12 @@ $(PMU_EVENTS_C): $(EMPTY_PMU_EVENTS_C) $(call rule_mkdir) $(Q)$(call echo-cmd,gen)cp $< $@ else -# Copy checked-in json for generation. +# Copy checked-in json to OUTPUT for generation if it's an out of source build +ifneq ($(OUTPUT),) $(OUTPUT)pmu-events/arch/%: pmu-events/arch/% $(call rule_mkdir) $(Q)$(call echo-cmd,gen)cp $< $@ +endif $(LEGACY_CACHE_JSON): $(LEGACY_CACHE_PY) $(call rule_mkdir) -- 2.47.3