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=-1.1 required=3.0 tests=DKIM_SIGNED,DKIM_VALID, DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_PASS, URIBL_BLOCKED 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 6FBE1C0044C for ; Tue, 6 Nov 2018 00:36:39 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id E5E9520827 for ; Tue, 6 Nov 2018 00:36:38 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=jms.id.au header.i=@jms.id.au header.b="RfA7r2/v" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org E5E9520827 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=jms.id.au Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-kernel-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1729017AbeKFJ7C (ORCPT ); Tue, 6 Nov 2018 04:59:02 -0500 Received: from mail-qt1-f193.google.com ([209.85.160.193]:37991 "EHLO mail-qt1-f193.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1725839AbeKFJ7C (ORCPT ); Tue, 6 Nov 2018 04:59:02 -0500 Received: by mail-qt1-f193.google.com with SMTP id p17so819590qtl.5; Mon, 05 Nov 2018 16:36:36 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=jms.id.au; s=google; h=mime-version:references:in-reply-to:from:date:message-id:subject:to :cc; bh=akTpZTBPAXL85p0vdHNPPTO7rOzjQoR6U5LUQJKn1MI=; b=RfA7r2/vEO7htlzv4TX/TPKT5VOahhWxZ/24AbrY2wZXuFNy0Z92iSX06CM4QvNSok hikpivth+IZu+ouQ+//kIflNHn+eSMSwj/iEc2PuSZfDRA9qDyKQXgwkD6yY3pxM5WI3 GVr/7TqsRtcM2M1SzVF9OYKSPgFEBYNmdmYDw= X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:mime-version:references:in-reply-to:from:date :message-id:subject:to:cc; bh=akTpZTBPAXL85p0vdHNPPTO7rOzjQoR6U5LUQJKn1MI=; b=KKHK2/t6spA5I1sDrsS1TTWWbT3LlU6myfkqNtIAxJTMIdF1wlRvkGxnW/9Tzx78/b kfOh3z05Rwa1hG5YxoS2Si1teeDf7CLnM4FB8Tehi/5Z1qaE/y+RynLTmEFiJNmpxsvu URJjQM6W9c75yhb1gysDRKoGzcSdOdsNADXCUgaHFGVkJsHXMLctN7+3dubywYORpqIu N8O4+CffLSQ8JE3dRRDSZGU7JZ2Mb28BLq5qXZ8xNgb2+QaT4y6Ssn260wHlZk3E/SOS QmTg01htdNCg1kHTtMtQJo/i9gWOGxSPK1IQhiO8Akk1fWxl8+0Kv5+6yGN7HTnwgR1E j3kw== X-Gm-Message-State: AGRZ1gJL5ldxMrGvpyVC4kt3vWbnY+YecjtR6MnjzoIeZPrVOc7/w/0p GEVPiBqLN7W0JFgTcDCd/FtNBcgac2vnCNBoQG0= X-Google-Smtp-Source: AJdET5ce2zdHFhoWH1IuOJrVG9+R+YvIHaDiKffeGGN486EVZ6jUj3Go2Avkv1E/k77CkwjvKpJyRbE31fzXkxVcSBA= X-Received: by 2002:ac8:2992:: with SMTP id 18-v6mr23222098qts.266.1541464596135; Mon, 05 Nov 2018 16:36:36 -0800 (PST) MIME-Version: 1.0 References: <20181104231133.30848-1-joel@jms.id.au> In-Reply-To: From: Joel Stanley Date: Tue, 6 Nov 2018 11:06:24 +1030 Message-ID: Subject: Re: [PATCH 0/2] poewrpc/Boot: Fix cross compiling with clang To: Nick Desaulniers , Benjamin Herrenschmidt , Michael Ellerman , Paul Mackerras Cc: Masahiro Yamada , Michal Marek , linux-kbuild@vger.kernel.org, Linux Kernel Mailing List , linuxppc-dev@lists.ozlabs.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 On Tue, 6 Nov 2018 at 09:07, Nick Desaulniers wrote: > > On Sun, Nov 4, 2018 at 3:11 PM Joel Stanley wrote: > > > > Hello, > > > > These patches allow clang to cross-compile the powerpc boot wrapper. > > The boot wrapper constructs it's own compiler flags as it may not be > > built for the same arch as the kernel. > > Hi Joel, thanks for the series! I'm just curious, how does the boot > wrapper run on a different arch than the kernel? The kernel can have a ppc32 boot wrapper for a ppc64 kernel. There's some rationale in the boot wrapper's Makefile: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/tree/arch/powerpc/boot/Makefile#n10 Cheers, Joel