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Message-ID: <YzXdjNNh+jbYDnYz@kernel.org> Date: Thu, 29 Sep 2022 15:01:48 -0300 From: Arnaldo Carvalho de Melo <acme@...nel.org> To: Jiri Olsa <jolsa@...nel.org> Cc: lkml <linux-kernel@...r.kernel.org>, Peter Zijlstra <a.p.zijlstra@...llo.nl>, Ingo Molnar <mingo@...nel.org>, Mark Rutland <mark.rutland@....com>, Namhyung Kim <namhyung@...nel.org>, Alexander Shishkin <alexander.shishkin@...ux.intel.com>, Ian Rogers <irogers@...gle.com>, linux-perf-users@...r.kernel.org Subject: Re: [PATCH 1/2] perf tools: Fix bison object compilation with clang 15 Em Thu, Sep 29, 2022 at 04:05:13PM +0200, Jiri Olsa escreveu: > Arnaldo reported compilation fail with clang 15: > > CC util/parse-events-bison.o > util/parse-events-bison.c:1401:9: error: variable 'parse_events_nerrs' > set but not used [-Werror,-Wunused-but-set-variable] > int yynerrs = 0; > ^ > util/parse-events-bison.c:72:25: note: expanded from macro 'yynerrs' > #define yynerrs parse_events_nerrs > ^ > 1 error generated. > > Disabling -Wunused-but-set-variable check for bison object compilation. So we have to disable something else: 37 44.92 fedora:32 : FAIL clang version 10.0.1 (Fedora 10.0.1-3.fc32) error: unknown warning option '-Wno-unused-but-set-variable'; did you mean '-Wno-unused-const-variable'? [-Werror,-Wunknown-warning-option] make[3]: *** [/git/perf-6.0.0-rc7/tools/build/Makefile.build:139: util] Error 2 38 61.77 fedora:33 : FAIL clang version 11.0.0 (Fedora 11.0.0-3.fc33) error: unknown warning option '-Wno-unused-but-set-variable'; did you mean '-Wno-unused-const-variable'? [-Werror,-Wunknown-warning-option] make[3]: *** [/git/perf-6.0.0-rc7/tools/build/Makefile.build:139: util] Error 2 39 66.59 fedora:34 : FAIL clang version 12.0.1 (Fedora 12.0.1-1.fc34) error: unknown warning option '-Wno-unused-but-set-variable'; did you mean '-Wno-unused-const-variable'? [-Werror,-Wunknown-warning-option] make[3]: *** [/git/perf-6.0.0-rc7/tools/build/Makefile.build:139: util] Error 2 I'll try yours + -Wno-unknown-warning-option ;-) - Arnaldo > Signed-off-by: Jiri Olsa <jolsa@...nel.org> > --- > tools/perf/util/Build | 2 +- > 1 file changed, 1 insertion(+), 1 deletion(-) > > diff --git a/tools/perf/util/Build b/tools/perf/util/Build > index 8fd6dc8de521..d559c80559e3 100644 > --- a/tools/perf/util/Build > +++ b/tools/perf/util/Build > @@ -270,7 +270,7 @@ CFLAGS_expr-flex.o += $(flex_flags) > bison_flags := -DYYENABLE_NLS=0 > BISON_GE_35 := $(shell expr $(shell $(BISON) --version | grep bison | sed -e 's/.\+ \([0-9]\+\).\([0-9]\+\)/\1\2/g') \>\= 35) > ifeq ($(BISON_GE_35),1) > - bison_flags += -Wno-unused-parameter -Wno-nested-externs -Wno-implicit-function-declaration -Wno-switch-enum > + bison_flags += -Wno-unused-parameter -Wno-nested-externs -Wno-implicit-function-declaration -Wno-switch-enum -Wno-unused-but-set-variable > else > bison_flags += -w > endif > -- > 2.37.3 -- - Arnaldo
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