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=-21.6 required=3.0 tests=DKIMWL_WL_MED,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH, MAILING_LIST_MULTI,MENTIONS_GIT_HOSTING,SIGNED_OFF_BY,SPF_PASS,USER_AGENT_GIT, USER_IN_DEF_DKIM_WL 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 17573C282C2 for ; Thu, 7 Feb 2019 22:02:49 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id C4F1F21721 for ; Thu, 7 Feb 2019 22:02:48 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=google.com header.i=@google.com header.b="r70SoXyb" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727141AbfBGWCr (ORCPT ); Thu, 7 Feb 2019 17:02:47 -0500 Received: from mail-it1-f202.google.com ([209.85.166.202]:59703 "EHLO mail-it1-f202.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727085AbfBGWCq (ORCPT ); Thu, 7 Feb 2019 17:02:46 -0500 Received: by mail-it1-f202.google.com with SMTP id t143so2386708itc.9 for ; Thu, 07 Feb 2019 14:02:46 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20161025; h=date:in-reply-to:message-id:mime-version:references:subject:from:to :cc; bh=eegGQ+TDUvyP04r1vddWpgDCV6euPHpHx7dZx3qsf9g=; b=r70SoXybzoOCIkWu2j8mHZU8g0T5YQAGdrIRivO7Fturw9VJMugfsd1neIGkdH7Er1 dyAjuZyQputIMHrZBXJ29KnbhRagGBiey30mdOvY4OMmAuZMQvjYODVqZeO8iF48xIzG rBhUba+pAiojFj7gUgxP41P3WBpF/SfwrlP+RksQ0LyoidZEBUZQApvdpSMGATUEtewi B65bDNa5b53iEYCsysInHQAOb6b2bDc9Pong9Gm1o6rFjz/K1yWrV+98YVsTsRkTs3Dl jYASom8/BBGx3ldWHLZOPusu71rPUZrStAB4tVtTsAEP9rZW8oOcA4et2Jp8YpV3DUjh XNQA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:date:in-reply-to:message-id:mime-version :references:subject:from:to:cc; bh=eegGQ+TDUvyP04r1vddWpgDCV6euPHpHx7dZx3qsf9g=; b=rPd1k3eFXxb0gwE2BDuets0GyHXC6B067L4EHprnqZHU2emdwl+q4YyfPTR9Z34ndD xV/FSEf1ipcZdpheorcTXioTQAQnE5oOL1hS5eKkCxKGrCQGBkh5ocsdhZCHcFkANc9z MF9yPgwB1cmY8/a1aFpXIk/opKvMceP4yHBqHPME4p40i0U48c3gl8qtMcyJuG7ml81b zwQ/bJxvT3Wz4GI4uBprLP2INywc+9m4ONGgmuNMvIAMV9gVzmu38XHzHkoV6tFi1ypl s+lkq8Ydt+b4RvLiSJ5ZTgoNNT2d5Xa2GHAHE6jMChoMaY0wcnQAh5TGgFlZ3rxHBDXk 0fBA== X-Gm-Message-State: AHQUAuYXhAY5596ICKWS15/uhVldGp69bMfQSrbpY4mH3actZVDIOp2k 7mmWGcvCO4XPAHRl+w3YjBz4RdTerz3UTosQh/8= X-Google-Smtp-Source: AHgI3Ibav9Uf6gMTGf3azbmCskscwy0sOHZk3WccVi7eZymU8SgkUiG9YtamdMiJLkL0IGdpQs53SbSMD6CCMIMpxKA= X-Received: by 2002:a24:248d:: with SMTP id f135mr7815646ita.36.1549576965962; Thu, 07 Feb 2019 14:02:45 -0800 (PST) Date: Thu, 7 Feb 2019 14:01:51 -0800 In-Reply-To: <20190207220155.81351-1-ndesaulniers@google.com> Message-Id: <20190207220155.81351-3-ndesaulniers@google.com> Mime-Version: 1.0 References: <20190207220155.81351-1-ndesaulniers@google.com> X-Mailer: git-send-email 2.20.1.791.gb4d0f1c61a-goog Subject: [PATCH 3/4] Makefile: lld: tell clang to use lld From: ndesaulniers@google.com To: yamada.masahiro@socionext.com Cc: Nick Desaulniers , Nathan Chancellor , Michal Marek , linux-kbuild@vger.kernel.org, linux-kernel@vger.kernel.org Content-Type: text/plain; charset="UTF-8" Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org This is needed because clang doesn't select which linker to use based on $LD but rather -fuse-ld=$(LD). This is problematic especially for cc-ldoption, which checks for linker flag support via invoking the compiler, rather than the linker. Link: https://github.com/ClangBuiltLinux/linux/issues/342 Suggested-by: Nathan Chancellor Signed-off-by: Nick Desaulniers --- Makefile | 3 +++ 1 file changed, 3 insertions(+) diff --git a/Makefile b/Makefile index 0eae4277206e..6307c17259ea 100644 --- a/Makefile +++ b/Makefile @@ -502,6 +502,9 @@ endif CLANG_FLAGS += -no-integrated-as KBUILD_CFLAGS += $(CLANG_FLAGS) KBUILD_AFLAGS += $(CLANG_FLAGS) +ifneq ($(shell $(LD) --version 2>&1 | head -n 1 | grep LLD),) +CLANG_FLAGS += -fuse-ld=lld +endif export CLANG_FLAGS endif -- 2.20.1.791.gb4d0f1c61a-goog