[linux-yocto] [PATCH 2/2] perf tools: Fix parallel build

tom.zanussi at intel.com tom.zanussi at intel.com
Fri Oct 5 09:35:27 PDT 2012

From: Eric Sandeen

Parallel builds of perf were failing for me on a 32p box, with:

    * new build flags or prefix
util/pmu.l:7:23: error: pmu-bison.h: No such file or directory


make: *** [util/pmu-flex.o] Error 1
make: *** Waiting for unfinished jobs....

This can pretty quickly be seen by adding a sleep in front of the bison
calls in tools/perf/Makefile and running make -j4 on a smaller box i.e.:

	sleep 10; $(QUIET_BISON)$(BISON) -v util/pmu.y -d -o $(OUTPUT)util/pmu-bison.c

Adding the following dependencies fixes it for me.

Signed-off-by: Eric Sandeen
Reviewed-by: Namhyung Kim
Cc: Namhyung Kim
Link: http://lkml.kernel.org/r/505BD190.40707
Signed-off-by: Arnaldo Carvalho de Melo

Backported-to-linux-yocto-3.4-by: Tom Zanussi <tom.zanussi at intel.com>
 tools/perf/Makefile | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/tools/perf/Makefile b/tools/perf/Makefile
index 3262f98..b223a60 100644
--- a/tools/perf/Makefile
+++ b/tools/perf/Makefile
@@ -237,13 +237,13 @@ export PERL_PATH
 FLEX = flex
 BISON= bison
-$(OUTPUT)util/parse-events-flex.c: util/parse-events.l
+$(OUTPUT)util/parse-events-flex.c: util/parse-events.l $(OUTPUT)util/parse-events-bison.c
 	$(QUIET_FLEX)$(FLEX) --header-file=$(OUTPUT)util/parse-events-flex.h -t util/parse-events.l > $(OUTPUT)util/parse-events-flex.c
 $(OUTPUT)util/parse-events-bison.c: util/parse-events.y
 	$(QUIET_BISON)$(BISON) -v util/parse-events.y -d -o $(OUTPUT)util/parse-events-bison.c
-$(OUTPUT)util/pmu-flex.c: util/pmu.l
+$(OUTPUT)util/pmu-flex.c: util/pmu.l $(OUTPUT)util/pmu-bison.c
 	$(QUIET_FLEX)$(FLEX) --header-file=$(OUTPUT)util/pmu-flex.h -t util/pmu.l > $(OUTPUT)util/pmu-flex.c
 $(OUTPUT)util/pmu-bison.c: util/pmu.y

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