linux-kernel - arch/mips/vdso/gettimeofday.c:1:0: error: '-march=r3900' requires '-mfp32'

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Message-ID: <201608020417.40ZJEKmz%fengguang.wu@intel.com>
Date:	Tue, 2 Aug 2016 04:24:19 +0800
From:	kbuild test robot <fengguang.wu@...el.com>
To:	Guenter Roeck <linux@...ck-us.net>
Cc:	kbuild-all@...org, linux-kernel@...r.kernel.org,
	Ralf Baechle <ralf@...ux-mips.org>
Subject: arch/mips/vdso/gettimeofday.c:1:0: error: '-march=r3900' requires
 '-mfp32'

Hi Guenter,

First bad commit (maybe != root cause):

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head:   f38d2e5313f0af9d9b66c02a5d49c71deb994b85
commit: 398c7500a1f5f74e207bd2edca1b1721b3cc1f1e MIPS: VDSO: Fix build error with binutils 2.24 and earlier
date:   7 months ago
config: mips-jmr3927_defconfig (attached as .config)
compiler: mips-linux-gnu-gcc (Debian 5.4.0-6) 5.4.0 20160609
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'
    /*
    ^

vim +1 arch/mips/vdso/gettimeofday.c

a7f4df4e Alex Smith 2015-10-21 @1  /*
a7f4df4e Alex Smith 2015-10-21  2   * Copyright (C) 2015 Imagination Technologies
a7f4df4e Alex Smith 2015-10-21  3   * Author: Alex Smith <alex.smith@...tec.com>
a7f4df4e Alex Smith 2015-10-21  4   *
a7f4df4e Alex Smith 2015-10-21  5   * This program is free software; you can redistribute it and/or modify it
a7f4df4e Alex Smith 2015-10-21  6   * under the terms of the GNU General Public License as published by the
a7f4df4e Alex Smith 2015-10-21  7   * Free Software Foundation;  either version 2 of the  License, or (at your
a7f4df4e Alex Smith 2015-10-21  8   * option) any later version.
a7f4df4e Alex Smith 2015-10-21  9   */

:::::: The code at line 1 was first introduced by commit
:::::: a7f4df4e21dd8a8dab96e88acd2c9c5017b83fc6 MIPS: VDSO: Add implementations of gettimeofday() and clock_gettime()

:::::: TO: Alex Smith <alex.smith@...tec.com>
:::::: CC: Ralf Baechle <ralf@...ux-mips.org>

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