From patchwork Thu May 9 06:44:55 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Masahiro Yamada X-Patchwork-Id: 163692 Delivered-To: patch@linaro.org Received: by 2002:a05:6e02:142:0:0:0:0 with SMTP id j2csp575763ilr; Wed, 8 May 2019 23:46:14 -0700 (PDT) X-Google-Smtp-Source: APXvYqyHsC3RAddHfhZ5XApNHmfMfKJ2mFm3kng28/8XWKzwKsCVYXegn0dxVqECAE0sqfANV3Kd X-Received: by 2002:a62:5845:: with SMTP id m66mr2796193pfb.41.1557384374253; Wed, 08 May 2019 23:46:14 -0700 (PDT) ARC-Seal: i=1; a=rsa-sha256; t=1557384374; cv=none; d=google.com; s=arc-20160816; b=hsjzVfEAq/EQUWKNMx46KsXd1RcZq9RyQvDPgcqlqSu0qnk2h333Ub6kYaC55i4vi7 5Qvv9n9V1CWvs0biuaCCWp/0wzD32HqTLMGiQ9Zxtuecp+7UYpbuFLBo2rXroOxWwpzB RJhSTFts1chVM68/QTLGSMKfnzHMu4LagjdJ1JRNXozH9qckA7Oy9oJoJVpB/jVslRJR 11z5BRNtTBIhgaSaQlYY//xWMtvOa17NLx/lkBH0sXiNrlG9lWDhNNSy1DxYTXlNUyLE xZb9RrRSPOLZDueeeyua+F2qyHnUxDnwefliaLGOsQ4NUGUaxFcs0a8Kysb2beyh83KG xHww== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=list-id:precedence:sender:message-id:date:subject:cc:to:from :dkim-signature:dkim-filter; bh=ZmodlAgJDx+4Bn0ZK3dZyFQf7agV4L/RsO8W9qSntN0=; b=r8ny3BtuJZyeWnvSKULQ7ehML5bUGDVoMUsmqKbgxWuJNTQtR+lDX1mpwvNafkPWbP CJA6GO00iRdM2fHUnvedsW/vdst+C5Z5ws4QXI3fgtP19XuEyqkRDJLcFRfqd4mTrgVv IDa+7njlEJpJECR8Xh1vh+hTBf9Jlo+BPPUAqWBrEBFbf6bXvOZfe1QkRH6Ahezy6cDS kbeMpo0gKWus+ANRUX1cGRAM0oWen6rCtNy3UlgTBktuk6rPgj6ZwCyshg70ws+B8jDC ln9+C8QpWDTFBSqjrsCr74S4ImvPOdv5Z0uA12w59zahqgsV0XfO+fLVKQM0Id/0rkFW YjGQ== ARC-Authentication-Results: i=1; mx.google.com; dkim=pass header.i=@nifty.com header.s=dec2015msa header.b=pEbXKMR8; spf=pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org Return-Path: Received: from vger.kernel.org (vger.kernel.org. [209.132.180.67]) by mx.google.com with ESMTP id d4si1719397pgc.304.2019.05.08.23.46.13; Wed, 08 May 2019 23:46:14 -0700 (PDT) Received-SPF: pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) client-ip=209.132.180.67; Authentication-Results: mx.google.com; dkim=pass header.i=@nifty.com header.s=dec2015msa header.b=pEbXKMR8; spf=pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726603AbfEIGqC (ORCPT + 30 others); Thu, 9 May 2019 02:46:02 -0400 Received: from conuserg-11.nifty.com ([210.131.2.78]:40658 "EHLO conuserg-11.nifty.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726099AbfEIGqB (ORCPT ); Thu, 9 May 2019 02:46:01 -0400 Received: from localhost.localdomain (p14092-ipngnfx01kyoto.kyoto.ocn.ne.jp [153.142.97.92]) (authenticated) by conuserg-11.nifty.com with ESMTP id x496j7Vr017928; Thu, 9 May 2019 15:45:07 +0900 DKIM-Filter: OpenDKIM Filter v2.10.3 conuserg-11.nifty.com x496j7Vr017928 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=nifty.com; s=dec2015msa; t=1557384307; bh=ZmodlAgJDx+4Bn0ZK3dZyFQf7agV4L/RsO8W9qSntN0=; h=From:To:Cc:Subject:Date:From; b=pEbXKMR8YvAnpIkGsdPF2sD82pO8HtkWwfyrLxlNKdZadNPnf3ssO+W3yXgI+cf4y XUAc/ihyIzF2MTIG0khGbHRAKK0STPWmtWzi0OWHPTCw4/IJLmKSdielO4i53c1kRG /Anq7JNbNz8TtDvLzgC3Gv3jckSInALv1LLzld7anqTyZVypfZlVQrJcuv/wAI0hNb IviRk8xfR+dAwA6D76r39XZWHFFyLr4QdmmVa2hUn0GEvXM3hKzzb/Z4+LdtiU/bN2 gD1M8pgegBT9i9s4oEulJihQBATjblgCtCVn6vcXSucSChzK5ehkhprd2AMm06fOto dDk4MYmiu+HUQ== X-Nifty-SrcIP: [153.142.97.92] From: Masahiro Yamada To: linux-kbuild@vger.kernel.org Cc: Nick Desaulniers , Nathan Chancellor , Arnd Bergmann , clang-built-linux@googlegroups.com, Masahiro Yamada , Michal Marek , linux-kernel@vger.kernel.org Subject: [PATCH] kbuild: add most of Clang-specific flags unconditionally Date: Thu, 9 May 2019 15:44:55 +0900 Message-Id: <20190509064455.1173-1-yamada.masahiro@socionext.com> X-Mailer: git-send-email 2.17.1 Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org We do not support old Clang versions. Upgrade your clang version if any of these flags is unsupported. Let's add flags within ifdef CONFIG_CC_IS_CLANG unconditionally, except -fcatch-undefined-behavior. Signed-off-by: Masahiro Yamada --- Makefile | 10 +++++----- scripts/Makefile.extrawarn | 12 ++++++------ 2 files changed, 11 insertions(+), 11 deletions(-) -- 2.17.1 Reviewed-by: Sedat Dilek Reviewed-by: Nathan Chancellor Reviewed-by: Nick Desaulniers Tested-by: Nick Desaulniers diff --git a/Makefile b/Makefile index bd7ae11947cb..c71ffb6f55b5 100644 --- a/Makefile +++ b/Makefile @@ -731,15 +731,15 @@ stackp-flags-$(CONFIG_STACKPROTECTOR_STRONG) := -fstack-protector-strong KBUILD_CFLAGS += $(stackp-flags-y) ifdef CONFIG_CC_IS_CLANG -KBUILD_CPPFLAGS += $(call cc-option,-Qunused-arguments,) -KBUILD_CFLAGS += $(call cc-disable-warning, format-invalid-specifier) -KBUILD_CFLAGS += $(call cc-disable-warning, gnu) +KBUILD_CPPFLAGS += -Qunused-arguments +KBUILD_CFLAGS += -Wno-format-invalid-specifier +KBUILD_CFLAGS += -Wno-gnu # Quiet clang warning: comparison of unsigned expression < 0 is always false -KBUILD_CFLAGS += $(call cc-disable-warning, tautological-compare) +KBUILD_CFLAGS += -Wno-tautological-compare # CLANG uses a _MergedGlobals as optimization, but this breaks modpost, as the # source of a reference will be _MergedGlobals and not on of the whitelisted names. # See modpost pattern 2 -KBUILD_CFLAGS += $(call cc-option, -mno-global-merge,) +KBUILD_CFLAGS += -mno-global-merge KBUILD_CFLAGS += $(call cc-option, -fcatch-undefined-behavior) else diff --git a/scripts/Makefile.extrawarn b/scripts/Makefile.extrawarn index 768306add591..523c4cafe2dc 100644 --- a/scripts/Makefile.extrawarn +++ b/scripts/Makefile.extrawarn @@ -66,11 +66,11 @@ KBUILD_CFLAGS += $(warning) else ifdef CONFIG_CC_IS_CLANG -KBUILD_CFLAGS += $(call cc-disable-warning, initializer-overrides) -KBUILD_CFLAGS += $(call cc-disable-warning, unused-value) -KBUILD_CFLAGS += $(call cc-disable-warning, format) -KBUILD_CFLAGS += $(call cc-disable-warning, sign-compare) -KBUILD_CFLAGS += $(call cc-disable-warning, format-zero-length) -KBUILD_CFLAGS += $(call cc-disable-warning, uninitialized) +KBUILD_CFLAGS += -Wno-initializer-overrides +KBUILD_CFLAGS += -Wno-unused-value +KBUILD_CFLAGS += -Wno-format +KBUILD_CFLAGS += -Wno-sign-compare +KBUILD_CFLAGS += -Wno-format-zero-length +KBUILD_CFLAGS += -Wno-uninitialized endif endif