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=-6.1 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS autolearn=no 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 75D07C433F5 for ; Sat, 4 Sep 2021 17:22:47 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 5C699604AC for ; Sat, 4 Sep 2021 17:22:47 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S237150AbhIDRXs (ORCPT ); Sat, 4 Sep 2021 13:23:48 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:58264 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S237088AbhIDRXr (ORCPT ); Sat, 4 Sep 2021 13:23:47 -0400 Received: from mail-lf1-x133.google.com (mail-lf1-x133.google.com [IPv6:2a00:1450:4864:20::133]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id C28BCC061757 for ; Sat, 4 Sep 2021 10:22:45 -0700 (PDT) Received: by mail-lf1-x133.google.com with SMTP id t12so4767318lfg.9 for ; Sat, 04 Sep 2021 10:22:45 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linuxfoundation.org; s=google; h=mime-version:references:in-reply-to:from:date:message-id:subject:to :cc; bh=98jOqbKpX72E4sPthsn4i3f66mKPjIJDIcd25lirePI=; b=eG78AXkrvMPYFu6Gt5/vrTdbimFDR9TXxplLlMw1nHmpyJUrQcTh/9wCJeHztK4N/O YH6b6mzsWGz7vhhhzfSL8IebU3Rub4K0pwZno/LNvT//BotGevQQBUiOT3pV0qZM6otl SWBcPAB7k8Xg5RezMwEmNMsTPJcn+HxEyK5cw= 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=98jOqbKpX72E4sPthsn4i3f66mKPjIJDIcd25lirePI=; b=cM2FDO+ImXxfolSOo6nKyviYaTuLJEuASQ9k6tengeCoqZecDYNfmQJ5tuMfSrUcAc JyhcjALIyXyEkjT+z6jQpCX4dS04PZDFgdOxSwhmGcnnGLTDganhLd3NRQnH2zmng1lJ 0e1WZPJZLSPUI8sn+b6bf21YI0fdv/I+c7DE5mpe4tUcBoHdiBj/dO8CMDdnCauXVx3/ CVFp5OVJSmMwMzD0u+a3UUjDufYMcFhnjpWJvP1Gx3iuKa4tVyNl7WFKBCCU/RjV8woX +2wBc6qTSFZjW+3mCrsmku3c5ACY5BDKEz7+gqAbb7fV1STfxSUyreEGpAP08kW0MIYM vi0A== X-Gm-Message-State: AOAM531YRZAbZ9jV7edfP8aEOCgorTYPIT3YL6HqRs45zTt2+xdE5zF5 vaWJILs6Y6WcSw6+Pn7eBQMMzaNh8jGB4rWF X-Google-Smtp-Source: ABdhPJz611VVxTyFGLwAUWOLr5i94UYxjCSslOp9lT0JQ6mc1mHmoCOCE+EOXvcf9kSnUiL5BagjGA== X-Received: by 2002:a05:6512:2294:: with SMTP id f20mr3767730lfu.431.1630776163337; Sat, 04 Sep 2021 10:22:43 -0700 (PDT) Received: from mail-lj1-f175.google.com (mail-lj1-f175.google.com. [209.85.208.175]) by smtp.gmail.com with ESMTPSA id u3sm295054lju.107.2021.09.04.10.22.41 for (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Sat, 04 Sep 2021 10:22:42 -0700 (PDT) Received: by mail-lj1-f175.google.com with SMTP id s12so3900233ljg.0 for ; Sat, 04 Sep 2021 10:22:41 -0700 (PDT) X-Received: by 2002:a2e:a363:: with SMTP id i3mr3513230ljn.56.1630776161685; Sat, 04 Sep 2021 10:22:41 -0700 (PDT) MIME-Version: 1.0 References: <3b461878-a4a0-2f84-e177-9daf8fe285e7@kernel.org> <878s0c4vng.fsf@oldenburg.str.redhat.com> <20210904131911.GP1583@gate.crashing.org> <871r644bd2.fsf@oldenburg.str.redhat.com> In-Reply-To: <871r644bd2.fsf@oldenburg.str.redhat.com> From: Linus Torvalds Date: Sat, 4 Sep 2021 10:22:25 -0700 X-Gmail-Original-Message-ID: Message-ID: Subject: Re: [GIT PULL v2] Kbuild updates for v5.15-rc1 To: Florian Weimer Cc: Segher Boessenkool , Nathan Chancellor , Masahiro Yamada , Nick Desaulniers , Linux Kbuild mailing list , Linux Kernel Mailing List , clang-built-linux , llvm@lists.linux.dev, linux-toolchains@vger.kernel.org Content-Type: text/plain; charset="UTF-8" Precedence: bulk List-ID: X-Mailing-List: linux-kbuild@vger.kernel.org On Sat, Sep 4, 2021 at 8:19 AM Florian Weimer wrote: > > In any case, it would be nice to know what the real motivation is. I don't know about the original motivation, but the reason I like that patch after-the-fact is that I've actually been in situations where I test out self-built compilers without installing them. Then it's convenient to have a completely standalone kernel tree. Nobody cares about things like They are completely irrelevant for the kernel, exactly because we've always just done our own, or used __builtin_xyz() for things. is the only actual core header file that we have always taken from the installed system headers - because historically it really was required. Everything else we can just do ourselves. Linus