+include $(srctree)/tools/scripts/Makefile.include
include $(srctree)/tools/scripts/utilities.mak
perf-y += arm64-frame-pointer-unwind-support.o
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 += $(flex_flags)
-
# Some newer clang and gcc version complain about this
# util/parse-events-bison.c:1317:9: error: variable 'parse_events_nerrs' set but not used [-Werror,-Wunused-but-set-variable]
# int yynerrs = 0;
bison_flags := -DYYENABLE_NLS=0 -Wno-unused-but-set-variable
+
+# Old clangs don't grok -Wno-unused-but-set-variable, remove it
+ifeq ($(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))
+ flex_flags := $(subst -Wno-unused-but-set-variable,,$(flex_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
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)