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

[Ian Rogers]

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.

Signed-off-by: Ian Rogers <irogers at google.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