Messages in this thread Patch in this message | | | Date | Fri, 11 Aug 2023 10:36:18 -0300 | From | Arnaldo Carvalho de Melo <> | Subject | Re: [PATCH 1/1] perf build: Remove -Wno-unused-but-set-variable from the flex flags when building with clang < 13.0.0 |
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Em Thu, Aug 10, 2023 at 01:37:46PM -0300, Arnaldo Carvalho de Melo escreveu: > clang < 13.0.0 doesn't grok -Wno-unused-but-set-variable, so just remove > it to avoid: > > error: unknown warning option '-Wno-unused-but-set-variable'; did you mean '-Wno-unused-const-variable'? [-Werror,-Wunknown-warning-option] > make[4]: *** [/git/perf-6.5.0-rc4/tools/build/Makefile.build:128: /tmp/build/perf/util/pmu-flex.o] Error 1 > make[4]: *** Waiting for unfinished jobs.... > > Fixes: ddc8e4c966923ad1 ("perf build: Disable fewer bison warnings") > Cc: Adrian Hunter <adrian.hunter@intel.com> > Cc: Ian Rogers <irogers@google.com> > Cc: Jiri Olsa <jolsa@kernel.org> > Cc: Namhyung Kim <namhyung@kernel.org> > Link: https://lore.kernel.org/lkml/ > Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Need to do that also for the flex flags:
diff --git a/tools/perf/util/Build b/tools/perf/util/Build index a9051ab2d52ac926..9699e31ff4c04925 100644 --- a/tools/perf/util/Build +++ b/tools/perf/util/Build @@ -302,11 +302,6 @@ else flex_flags := -w endif -CFLAGS_parse-events-flex.o += $(flex_flags) -CFLAGS_pmu-flex.o += $(flex_flags) -CFLAGS_expr-flex.o += $(flex_flags) -CFLAGS_bpf-filter-flex.o += $(flex_flags) - # Some newer clang and gcc version complain about this # util/parse-events-bison.c:1317:9: error: variable 'parse_events_nerrs' set but not used [-Werror,-Wunused-but-set-variable] # int yynerrs = 0; @@ -318,6 +313,7 @@ ifeq ($(CC_NO_CLANG), 0) CLANG_VERSION := $(shell $(CLANG) --version | head -1 | sed 's/.*clang version \([[:digit:]]\+.[[:digit:]]\+.[[:digit:]]\+\).*/\1/g') ifeq ($(call version-lt3,$(CLANG_VERSION),13.0.0),1) bison_flags := $(subst -Wno-unused-but-set-variable,,$(bison_flags)) + flex_flags := $(subst -Wno-unused-but-set-variable,,$(flex_flags)) endif endif @@ -333,6 +329,11 @@ ifeq ($(BISON_LT_381),1) bison_flags += -DYYNOMEM=YYABORT endif +CFLAGS_parse-events-flex.o += $(flex_flags) +CFLAGS_pmu-flex.o += $(flex_flags) +CFLAGS_expr-flex.o += $(flex_flags) +CFLAGS_bpf-filter-flex.o += $(flex_flags) + 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) > --- > tools/perf/util/Build | 10 ++++++++++ > 1 file changed, 10 insertions(+) > > diff --git a/tools/perf/util/Build b/tools/perf/util/Build > index d487aec0b458a0d9..a9051ab2d52ac926 100644 > --- a/tools/perf/util/Build > +++ b/tools/perf/util/Build > @@ -1,3 +1,4 @@ > +include $(srctree)/tools/scripts/Makefile.include > include $(srctree)/tools/scripts/utilities.mak > > perf-y += arm64-frame-pointer-unwind-support.o > @@ -311,6 +312,15 @@ CFLAGS_bpf-filter-flex.o += $(flex_flags) > # int yynerrs = 0; > > bison_flags := -DYYENABLE_NLS=0 -Wno-unused-but-set-variable > + > +# Old clangs don't grok -Wno-unused-but-set-variable, remove it > +ifeq ($(CC_NO_CLANG), 0) > + CLANG_VERSION := $(shell $(CLANG) --version | head -1 | sed 's/.*clang version \([[:digit:]]\+.[[:digit:]]\+.[[:digit:]]\+\).*/\1/g') > + ifeq ($(call version-lt3,$(CLANG_VERSION),13.0.0),1) > + bison_flags := $(subst -Wno-unused-but-set-variable,,$(bison_flags)) > + endif > +endif > + > BISON_GE_382 := $(shell expr $(shell $(BISON) --version | grep bison | sed -e 's/.\+ \([0-9]\+\).\([0-9]\+\).\([0-9]\+\)/\1\2\3/g') \>\= 382) > ifeq ($(BISON_GE_382),1) > bison_flags += -Wno-switch-enum > -- > 2.37.1 >
--
- Arnaldo
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