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 Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 48F9DC54EE9 for ; Sun, 25 Sep 2022 15:22:02 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230379AbiIYPWA (ORCPT ); Sun, 25 Sep 2022 11:22:00 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:47932 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230047AbiIYPV4 (ORCPT ); Sun, 25 Sep 2022 11:21:56 -0400 Received: from 1wt.eu (wtarreau.pck.nerim.net [62.212.114.60]) by lindbergh.monkeyblade.net (Postfix) with ESMTP id CE8632B268 for ; Sun, 25 Sep 2022 08:21:54 -0700 (PDT) Received: (from willy@localhost) by pcw.home.local (8.15.2/8.15.2/Submit) id 28PFLgxA013152; Sun, 25 Sep 2022 17:21:42 +0200 Date: Sun, 25 Sep 2022 17:21:42 +0200 From: Willy Tarreau To: Mikhail Gavrilov Cc: ast@kernel.org, yhs@fb.com, sean.wang@mediatek.com, Linux List Kernel Mailing Subject: Re: Unable bisect issue because kernel not building from old commits Message-ID: <20220925152142.GA13116@1wt.eu> References: <20220925042031.GA9845@1wt.eu> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: User-Agent: Mutt/1.10.1 (2018-07-13) Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Sun, Sep 25, 2022 at 07:02:39PM +0500, Mikhail Gavrilov wrote: > > > > Note that this looks more related to binutils here. Regardless, there > > are pre-built toolchains including compiler+binutils for various gcc > > versions from 4.9 and up here, for all supported architectures: > > > > https://mirrors.edge.kernel.org/pub/tools/crosstool/ > > > > These ones are sufficient to build a kernel and are likely easier to > > deal with than trying to port a patch over a bisect session. For example > > you could have luck with 7.5 which has been supported for a very long > > time and still is supported. > > I don't quite understand how to switch to the downloaded binutils > without breaking the distribution. > I am building the kernel with the following command: > $ make clean && make -j32 bzImage && make -j32 modules Just add: CROSS_COMPILE=/path/to/toolchain/bin/prefix- to your make command line and it will be fine. The makefile will append {gcc,ld,...} to this CROSS_COMPILE prefix to construct the full pathname to the binaries. Willy