From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751669AbcAEOCy (ORCPT ); Tue, 5 Jan 2016 09:02:54 -0500 Received: from bh-25.webhostbox.net ([208.91.199.152]:48305 "EHLO bh-25.webhostbox.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751104AbcAEOCu (ORCPT ); Tue, 5 Jan 2016 09:02:50 -0500 Subject: Re: arch/mips/vdso/gettimeofday.c:1:0: error: '-march=r3900' requires '-mfp32' To: Fengguang Wu References: <201601051556.2YMiXcw0%fengguang.wu@intel.com> <568B7A2A.1000608@roeck-us.net> <20160105082252.GB1421@wfg-t540p.sh.intel.com> Cc: kbuild-all@01.org, "linux-kernel@vger.kernel.org" , Ralf Baechle From: Guenter Roeck Message-ID: <568BCD07.6090401@roeck-us.net> Date: Tue, 5 Jan 2016 06:02:47 -0800 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:38.0) Gecko/20100101 Thunderbird/38.4.0 MIME-Version: 1.0 In-Reply-To: <20160105082252.GB1421@wfg-t540p.sh.intel.com> Content-Type: text/plain; charset=windows-1252; format=flowed Content-Transfer-Encoding: 7bit X-Authenticated_sender: linux@roeck-us.net X-OutGoing-Spam-Status: No, score=-1.0 X-AntiAbuse: This header was added to track abuse, please include it with any abuse report X-AntiAbuse: Primary Hostname - bh-25.webhostbox.net X-AntiAbuse: Original Domain - vger.kernel.org X-AntiAbuse: Originator/Caller UID/GID - [47 12] / [47 12] X-AntiAbuse: Sender Address Domain - roeck-us.net X-Get-Message-Sender-Via: bh-25.webhostbox.net: authenticated_id: linux@roeck-us.net X-Authenticated-Sender: bh-25.webhostbox.net: linux@roeck-us.net X-Source: X-Source-Args: X-Source-Dir: Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 01/05/2016 12:22 AM, Fengguang Wu wrote: > On Tue, Jan 05, 2016 at 12:09:14AM -0800, Guenter Roeck wrote: >> On 01/04/2016 11:23 PM, kbuild test robot wrote: >>> Hi Guenter, >>> >>> First bad commit (maybe != root cause): >>> >>> tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master >>> head: 168309855a7d1e16db751e9c647119fe2d2dc878 >>> commit: 398c7500a1f5f74e207bd2edca1b1721b3cc1f1e MIPS: VDSO: Fix build error with binutils 2.24 and earlier >>> date: 6 days ago >>> config: mips-jmr3927_defconfig (attached as .config) >>> reproduce: >>> wget https://git.kernel.org/cgit/linux/kernel/git/wfg/lkp-tests.git/plain/sbin/make.cross -O ~/bin/make.cross >>> chmod +x ~/bin/make.cross >>> git checkout 398c7500a1f5f74e207bd2edca1b1721b3cc1f1e >>> # save the attached .config to linux build tree >>> make.cross ARCH=mips >>> >>> All errors (new ones prefixed by >>): >>> >>>>> arch/mips/vdso/gettimeofday.c:1:0: error: '-march=r3900' requires '-mfp32' >>> /* >>> ^ >>> >> AFAICS this is using the mips cross compiler version 4.9.0 from kernel.org [1], >> which in turn uses binutils 2.24. At least this is what make.cross tries to install. > > Oops, sorry. I'm now using the debian MIPS cross compiler 5.2.1 ... > make.cross has not been updated yet. > No problem. FWIW, I tested my patch with the compiler from Yocto 2.0, which uses gcc 5.2.0 and binutils 2.25.1, with no problem. Do you have directions on how to install a debian cross compiler into a Ubuntu system ? Alternatively, what version of binutils does the mips cross compiler use ? Thanks, Guenter >> I downloaded it and used it to compile both the attached configuration as well >> as jmr3927_defconfig. Both are building just fine for me. On top of that, >> arch/mips/vdso/gettimeofday.c should not build in the first place with binutils 2.24 >> (and doesn't build for me). >> >> What am I missing ? >> >> Guenter >> >> --- >> [1] https://www.kernel.org/pub/tools/crosstool/files/bin/x86_64/4.9.0/x86_64-gcc-4.9.0-nolibc_mips-linux.tar.xz >