From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-alma10-1.taild15c8.ts.net [100.103.45.18]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 9E18C3CFF55; Tue, 16 Jun 2026 18:01:45 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=100.103.45.18 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1781632906; cv=none; b=Kic8r0XkR3GCDEibEtQWFUuQno6D/CBk0pALVkgfv+KZ/V4NtIhx3HA7GLe+1P/6eb4Sggr9glHizIXMR2f+/UQSW/8UxXd3VpeS7G/wvG/jtqp84Sogzk3+AwzPZAWYxCZxyJoFg4QmAHAYh5odxRaOo8e6o8hpWG6ex6iEwRw= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1781632906; c=relaxed/simple; bh=VC+k/N0hQW7sQ2Sp9OS6NZFpZV2+TkVtZhW1SrSzKik=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=ZH2gCp0xgCQxl4qL9yzg/2/xsVqquiECAJYbrdBA/yJrR7RDR+RH1W5WQY+E/uqofbK2Mnm/Jb2kV1LvQyerL5GVwur/+T+XhSz/K9CU2758EtI4inZwFXmcnJwp0UlaquKzMnrNU+guAQRVpyEuGQppFFvn1IgBq2DYiCEWa4Y= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=z5DShiOR; arc=none smtp.client-ip=100.103.45.18 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b="z5DShiOR" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 0F5521F000E9; Tue, 16 Jun 2026 18:01:43 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linuxfoundation.org; s=korg; t=1781632905; bh=Rhcm12vBOKENke5PX70Oa8RGF8LF5avByfFe+3aUP70=; h=From:To:Cc:Subject:Date:In-Reply-To:References; b=z5DShiORff8yWr+u0p0OBvK0qRFepOUZ/hmJlzgfFmYqR7SHN4iuHNfclB/nChln9 vwJGVmGAjfTvRwEjFJUXI6vMyN9F0AUn6nQ7/xMBWmGe/shKS1ilxX2ySDCilO0kQI a8itfjrln7geV9Kvd+OvZnoKOQsCE7e5T18+482g= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Adrian Hunter , Ian Rogers , Jiri Olsa , Namhyung Kim , Arnaldo Carvalho de Melo , Florian Fainelli Subject: [PATCH 6.1 499/522] perf build: Remove -Wno-unused-but-set-variable from the flex flags when building with clang < 13.0.0 Date: Tue, 16 Jun 2026 20:30:46 +0530 Message-ID: <20260616145149.117110676@linuxfoundation.org> X-Mailer: git-send-email 2.54.0 In-Reply-To: <20260616145125.307082728@linuxfoundation.org> References: <20260616145125.307082728@linuxfoundation.org> User-Agent: quilt/0.69 X-stable: review X-Patchwork-Hint: ignore Precedence: bulk X-Mailing-List: patches@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit 6.1-stable review patch. If anyone has any objections, please let me know. ------------------ From: Arnaldo Carvalho de Melo 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 Cc: Ian Rogers Cc: Jiri Olsa Cc: Namhyung Kim Link: https://lore.kernel.org/lkml/ZNUSWr52jUnVaaa%2F@kernel.org/ Signed-off-by: Arnaldo Carvalho de Melo Signed-off-by: Florian Fainelli Signed-off-by: Greg Kroah-Hartman --- tools/perf/util/Build | 20 +++++++++++++++++--- 1 file changed, 17 insertions(+), 3 deletions(-) --- a/tools/perf/util/Build +++ b/tools/perf/util/Build @@ -1,3 +1,6 @@ +include $(srctree)/tools/scripts/Makefile.include +include $(srctree)/tools/scripts/utilities.mak + perf-y += arm64-frame-pointer-unwind-support.o perf-y += annotate.o perf-y += block-info.o @@ -265,15 +268,22 @@ ifeq ($(FLEX_GE_26),1) else flex_flags := -w endif -CFLAGS_parse-events-flex.o += $(flex_flags) -CFLAGS_pmu-flex.o += $(flex_flags) -CFLAGS_expr-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 ($(BISON_GE_382),1) bison_flags += -Wno-switch-enum @@ -286,6 +296,10 @@ ifeq ($(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_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)