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=-13.2 required=3.0 tests=BAYES_00,DKIMWL_WL_MED, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_IN_DEF_DKIM_WL 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 C6B56C433E0 for ; Fri, 5 Feb 2021 21:20:54 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 8969464FB9 for ; Fri, 5 Feb 2021 21:20:54 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S233403AbhBEVU0 (ORCPT ); Fri, 5 Feb 2021 16:20:26 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:53704 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S233809AbhBEVTG (ORCPT ); Fri, 5 Feb 2021 16:19:06 -0500 Received: from mail-lj1-x232.google.com (mail-lj1-x232.google.com [IPv6:2a00:1450:4864:20::232]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id AB7A6C061756 for ; Fri, 5 Feb 2021 13:18:26 -0800 (PST) Received: by mail-lj1-x232.google.com with SMTP id m22so9468864ljj.4 for ; Fri, 05 Feb 2021 13:18:26 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20161025; h=mime-version:references:in-reply-to:from:date:message-id:subject:to :cc; bh=M/mNa0cCFnCBPv9oOHupxAJvNU5NKzX9ZpjTVG00V9k=; b=Rtet6B6oBepuSfwX0Mt1avgYBOHHWa0CgvSO6WFeSeKf4J1sM4DcMrG5bc65K79XZ9 nKaRKqf4tLFb9DqAqjBdbVPE1pdd7ix3IWQtmQAvk+oFRK3jkfLSnLwd7A+0E1uGVp3f xbuoidh/QLlOJvEzBI3DNxo12oITSdhV/7NbJzexL7yOOWW2cbQHBvCbceZSgqfwYZyD TxYkr5eMaDsX+I7LjX6SN5fYusfBv+D4ILY7o5uSP2GEU5GkDyureKlPfYmR6aTaxQyc d95Y4a5cKG0yLJppR9vT8lGXoEr6hW2yf1/7lZLh6p7jVNZMPwjZRyTtkYG5LYODQKjC pb4g== 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=M/mNa0cCFnCBPv9oOHupxAJvNU5NKzX9ZpjTVG00V9k=; b=HjFYOVG0seQq8AMKXMs9fOV7kVzfCGbOBnrdYiGgMPI0bFmsOIGAnw6pJODEgUDsUN Hxu7MpSgXF2tbr0YEVmzVJU3sfn+LnTEkWKVxMuz+isoXbjjnoMl5LnV57wr75c6SRUO SQxNVwyFU5l5Hle2a9JIGBpqAU7QwoVG9iCB6vsolLLHAkEVzM/epKkNR39l19Oj1NP+ iFLQFzOh7X2dMQMDAtjaMKFmLiQg6b9Dym+n+pYQhTIjwSkM53R7a9MMY8UqRHOZD5RJ MR0UqBGXaabXCJIQJMv+vDGwXOWrLDa4abmrrhQPvbWe03O6uH2Q4Uun+gnLHYZHh3Q8 iWyw== X-Gm-Message-State: AOAM531EAvPgREQvH2UcphpSaLsuLaYkLlCh2NrUoE9fiS4haRmA/UaX f2fjpSVT4L02tQbQgc+A+5NzpggWPLJWZYEjVdnBuw== X-Google-Smtp-Source: ABdhPJx5dPeDrLYGW00hRiU8hbhTVJoK1h7ZXHKdpr6PjoJlcg9frjh8W/xaexNoFtIzucZTyFu9xlz6J9W1fEiRPhc= X-Received: by 2002:a2e:9cc8:: with SMTP id g8mr3809288ljj.479.1612559905021; Fri, 05 Feb 2021 13:18:25 -0800 (PST) MIME-Version: 1.0 References: <20210130004401.2528717-1-ndesaulniers@google.com> <20210130004401.2528717-2-ndesaulniers@google.com> <20210204103946.GA14802@wildebeest.org> <20fdd20fe067dba00b349407c4a0128c97c1a707.camel@klomp.org> <42d2542d4b7f9836121b92d9bf349afa920bd4cd.camel@klomp.org> <8696ef2e86c5d8078bf2d2c74fb3cbbecbd22c83.camel@klomp.org> In-Reply-To: <8696ef2e86c5d8078bf2d2c74fb3cbbecbd22c83.camel@klomp.org> From: Nick Desaulniers Date: Fri, 5 Feb 2021 13:18:11 -0800 Message-ID: Subject: Re: [PATCH v7 1/2] Kbuild: make DWARF version a choice To: Mark Wielaard , Jakub Jelinek , Nick Clifton Cc: Masahiro Yamada , Nathan Chancellor , Andrew Morton , Sedat Dilek , LKML , clang-built-linux , Linux Kbuild mailing list , linux-arch , Fangrui Song , Caroline Tice , Yonghong Song , Jiri Olsa , Andrii Nakryiko , Arnaldo Carvalho de Melo , Arvind Sankar , Nathan Chancellor , Guenter Roeck Content-Type: text/plain; charset="UTF-8" Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Fri, Feb 5, 2021 at 4:49 AM Mark Wielaard wrote: > > Hi Nick, > > On Thu, 2021-02-04 at 14:06 -0800, Nick Desaulniers wrote: > > On Thu, Feb 4, 2021 at 12:28 PM Mark Wielaard wrote: > > > I believe so yes, we did a mass-rebuild of all of Fedora a few weeks > > > back with a GCC11 pre-release and did find some tools which weren't > > > ready, but as far as I know all have been fixed now. I did try to I guess I'm curious whether https://bugzilla.redhat.com/show_bug.cgi?id=1922707 came up during the mass rebuild of all of Fedora a few weeks ago? Assuming the Linux kernel was part of that test, those warnings would have been both new and obviously related to changing the implicit default DWARF version. It's possible it was a kernel build without debug info enabled or a kernel version old enough to not have that linker warning enabled, I suppose. It might be good to check though, that way changes to GCC that impact the kernel are caught even sooner or ASAP. New diagnostics added every compiler release come to mind in particular. -- Thanks, ~Nick Desaulniers