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    Subject[PATCH 10/10] perf parse-events: Disable a subset of bison warnings
    From
    Rather than disable all warnings with -w, disable specific warnings.
    Tested with GCC 9.3.0 and clang 9.0.1.

    Signed-off-by: Ian Rogers <irogers@google.com>
    ---
    tools/perf/util/Build | 7 ++++---
    1 file changed, 4 insertions(+), 3 deletions(-)

    diff --git a/tools/perf/util/Build b/tools/perf/util/Build
    index 68885bae466e..c1f872ab7748 100644
    --- a/tools/perf/util/Build
    +++ b/tools/perf/util/Build
    @@ -229,9 +229,10 @@ flex_flags := -Wno-switch-enum -Wno-switch-default -Wno-unused-function -Wno-red
    CFLAGS_parse-events-flex.o += $(flex_flags)
    CFLAGS_pmu-flex.o += $(flex_flags)
    CFLAGS_expr-flex.o += $(flex_flags)
    -CFLAGS_parse-events-bison.o += -DYYENABLE_NLS=0 -w
    -CFLAGS_pmu-bison.o += -DYYENABLE_NLS=0 -DYYLTYPE_IS_TRIVIAL=0 -w
    -CFLAGS_expr-bison.o += -DYYENABLE_NLS=0 -DYYLTYPE_IS_TRIVIAL=0 -w
    +bison_flags := -DYYENABLE_NLS=0 -Wno-unused-parameter -Wno-nested-externs
    +CFLAGS_parse-events-bison.o += $(bison_flags)
    +CFLAGS_pmu-bison.o += -DYYLTYPE_IS_TRIVIAL=0 $(bison_flags)
    +CFLAGS_expr-bison.o += -DYYLTYPE_IS_TRIVIAL=0 $(bison_flags)

    $(OUTPUT)util/parse-events.o: $(OUTPUT)util/parse-events-flex.c $(OUTPUT)util/parse-events-bison.c
    $(OUTPUT)util/pmu.o: $(OUTPUT)util/pmu-flex.c $(OUTPUT)util/pmu-bison.c
    --
    2.27.0.278.ge193c7cf3a9-goog
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