From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-10.7 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI, SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS,USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 32AD4C433DF for ; Mon, 24 Aug 2020 09:41:15 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id E7A462071E for ; Mon, 24 Aug 2020 09:41:14 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1598262075; bh=zskI/d0TIb/JXTXOXNpSCcJMr/Pm3Vu+ILgNO18b/AM=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=0AShWaW2JHTwWIKgDCaKJC2jjrpdJZWXbPY9PMuDkzbrHyu/x8r5pgS23NZCOsF0g 96x89G8+RYIw8vd4yRkW8KD1KmGh4qer4/UpiUFuLB8Uqdwt2eNg3zTAgb4dFy+TSv WQfa47vyFPSGDQ0o0+OnEAdZT4TyYzhICAJX1h5I= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1729273AbgHXJlL (ORCPT ); Mon, 24 Aug 2020 05:41:11 -0400 Received: from mail.kernel.org ([198.145.29.99]:42736 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726830AbgHXIpd (ORCPT ); Mon, 24 Aug 2020 04:45:33 -0400 Received: from localhost (83-86-89-107.cable.dynamic.v4.ziggo.nl [83.86.89.107]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id 625FC2072D; Mon, 24 Aug 2020 08:45:32 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1598258732; bh=zskI/d0TIb/JXTXOXNpSCcJMr/Pm3Vu+ILgNO18b/AM=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=bQpC7gwUGolmsj2PI+Sn5GDBYiFFfAZyleYqUXuHWsOAKuDDhNUqouZwYeXVTzFCG LhNFmtcM0+GUfZLC7QGbC9OyeTxdUGdiMyPQzwvYFUVi+gp+3jCEMX5rtXc3/IiZz2 WeZbHM8KkJEuNK+TN1qs4yyin+tijE56P/ft8KlE= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Nick Desaulniers , Masahiro Yamada , Nathan Chancellor Subject: [PATCH 5.4 008/107] kbuild: replace AS=clang with LLVM_IAS=1 Date: Mon, 24 Aug 2020 10:29:34 +0200 Message-Id: <20200824082405.456721950@linuxfoundation.org> X-Mailer: git-send-email 2.28.0 In-Reply-To: <20200824082405.020301642@linuxfoundation.org> References: <20200824082405.020301642@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Masahiro Yamada commit 7e20e47c70f810d678d02941fa3c671209c4ca97 upstream. The 'AS' variable is unused for building the kernel. Only the remaining usage is to turn on the integrated assembler. A boolean flag is a better fit for this purpose. AS=clang was added for experts. So, I replaced it with LLVM_IAS=1, breaking the backward compatibility. Suggested-by: Nick Desaulniers Signed-off-by: Masahiro Yamada Reviewed-by: Nathan Chancellor Reviewed-by: Nick Desaulniers Signed-off-by: Nick Desaulniers Signed-off-by: Greg Kroah-Hartman --- Documentation/kbuild/llvm.rst | 5 ++++- Makefile | 2 +- 2 files changed, 5 insertions(+), 2 deletions(-) --- a/Documentation/kbuild/llvm.rst +++ b/Documentation/kbuild/llvm.rst @@ -50,11 +50,14 @@ LLVM Utilities LLVM has substitutes for GNU binutils utilities. These can be invoked as additional parameters to `make`. - make CC=clang AS=clang LD=ld.lld AR=llvm-ar NM=llvm-nm STRIP=llvm-strip \\ + make CC=clang LD=ld.lld AR=llvm-ar NM=llvm-nm STRIP=llvm-strip \\ OBJCOPY=llvm-objcopy OBJDUMP=llvm-objdump OBJSIZE=llvm-size \\ READELF=llvm-readelf HOSTCC=clang HOSTCXX=clang++ HOSTAR=llvm-ar \\ HOSTLD=ld.lld +Currently, the integrated assembler is disabled by default. You can pass +`LLVM_IAS=1` to enable it. + Getting Help ------------ --- a/Makefile +++ b/Makefile @@ -533,7 +533,7 @@ endif ifneq ($(GCC_TOOLCHAIN),) CLANG_FLAGS += --gcc-toolchain=$(GCC_TOOLCHAIN) endif -ifeq ($(if $(AS),$(shell $(AS) --version 2>&1 | head -n 1 | grep clang)),) +ifneq ($(LLVM_IAS),1) CLANG_FLAGS += -no-integrated-as endif CLANG_FLAGS += -Werror=unknown-warning-option