From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from relay.smtp-ext.broadcom.com (lpdvsmtp09.broadcom.com [192.19.166.228]) (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 75FAF3E9C3D; Wed, 20 May 2026 16:33:35 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=192.19.166.228 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1779294817; cv=none; b=nZOTUo7WS2i+VRC7Q8STPrKTYgOdR0HtiG68/LWhZWm4GUxu5zeNtpdEIcfQm3/iCh6JYAS7jmmfhdGSSxByWyYA4PcA2m2knOswhHX5zbqY/IQjoX7cP+kI4S5ikmAcyygFOao+AYj1zJ9G+st1JThmaXNiLB2oJAUCVOoC/pQ= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1779294817; c=relaxed/simple; bh=LRw5SU3M5IXzdbYaE9mpgc3ExjOv/zYLyK1fhSBO2ns=; h=From:To:Cc:Subject:Date:Message-Id:In-Reply-To:References: MIME-Version; b=GJS5EyM4YsbA2ZYCgwKcI4uU3GyNRFkM5Js6pClECy3lF0ul44V8s+fMNQ5v69cXzisqeeK98K1I9lRW2l9Xe5cDuy6O3ajIpSBWeIJmluQPL/jd/u5G0s47mtYgEYfQ/odwJRyaRxKGkIlpHuQeiSfEhu8l6oJ/ajVm1Ci+P8E= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=broadcom.com; spf=fail smtp.mailfrom=broadcom.com; dkim=pass (1024-bit key) header.d=broadcom.com header.i=@broadcom.com header.b=nqqFj02T; arc=none smtp.client-ip=192.19.166.228 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=broadcom.com Authentication-Results: smtp.subspace.kernel.org; spf=fail smtp.mailfrom=broadcom.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=broadcom.com header.i=@broadcom.com header.b="nqqFj02T" Received: from mail-acc-it-01.broadcom.com (mail-acc-it-01.acc.broadcom.net [10.35.36.83]) by relay.smtp-ext.broadcom.com (Postfix) with ESMTP id ED187C001AC5; Wed, 20 May 2026 09:33:34 -0700 (PDT) DKIM-Filter: OpenDKIM Filter v2.11.0 relay.smtp-ext.broadcom.com ED187C001AC5 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=broadcom.com; s=dkimrelay; t=1779294815; bh=LRw5SU3M5IXzdbYaE9mpgc3ExjOv/zYLyK1fhSBO2ns=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=nqqFj02TDklLjqkmTNcu2jfCkYq2fypWSoUdxZ+cz+50SIop6nCZYxk1jXht2YubV Yci8QMutQ9tErznbVSMwOSZNUmCgMQNA++gdgXE8ytpK4IcxY7JxI8bW8BoKnmfPBZ vThXxVYBvZinIwg7ze7gpFt/Kv9N5y0DHInDLJ4A= Received: from stbirv-lnx-1.igp.broadcom.net (stbirv-lnx-1.igp.broadcom.net [10.67.48.32]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (2048 bits) server-digest SHA256) (No client certificate requested) by mail-acc-it-01.broadcom.com (Postfix) with ESMTPSA id 671A7AEA3; Wed, 20 May 2026 12:33:33 -0400 (EDT) From: Florian Fainelli To: stable@vger.kernel.org Cc: Arnaldo Carvalho de Melo , Adrian Hunter , Ian Rogers , Jiri Olsa , Namhyung Kim , Florian Fainelli , Peter Zijlstra , Ingo Molnar , Arnaldo Carvalho de Melo , Mark Rutland , Alexander Shishkin , Nathan Chancellor , Nick Desaulniers , Tom Rix , linux-perf-users@vger.kernel.org (open list:PERFORMANCE EVENTS SUBSYSTEM), linux-kernel@vger.kernel.org (open list:PERFORMANCE EVENTS SUBSYSTEM), bpf@vger.kernel.org (open list:BPF [MISC]), llvm@lists.linux.dev (open list:CLANG/LLVM BUILD SUPPORT), bcm-kernel-feedback-list@broadcom.com Subject: [PATCH stable 6.1 v2 5/5] perf build: Remove -Wno-unused-but-set-variable from the flex flags when building with clang < 13.0.0 Date: Wed, 20 May 2026 09:33:20 -0700 Message-Id: <20260520163320.3073037-6-florian.fainelli@broadcom.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20260520163320.3073037-1-florian.fainelli@broadcom.com> References: <20260520163320.3073037-1-florian.fainelli@broadcom.com> Precedence: bulk X-Mailing-List: linux-perf-users@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit 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 Change-Id: I8db8a372d1e83d26fbe8beda2bcf4d1a871a2b80 --- tools/perf/util/Build | 20 +++++++++++++++++--- 1 file changed, 17 insertions(+), 3 deletions(-) diff --git a/tools/perf/util/Build b/tools/perf/util/Build index 036f9780b398..43f74f5b96f8 100644 --- 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) -- 2.34.1