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From: Fengguang Wu <fengguang.wu@intel.com>
To: Guenter Roeck <linux@roeck-us.net>
Cc: kbuild-all@01.org,
	"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
	Ralf Baechle <ralf@linux-mips.org>
Subject: Re: arch/mips/vdso/gettimeofday.c:1:0: error: '-march=r3900' requires '-mfp32'
Date: Wed, 6 Jan 2016 19:50:39 +0800	[thread overview]
Message-ID: <20160106115039.GA21529@wfg-t540p.sh.intel.com> (raw)
In-Reply-To: <20160105143039.GA5772@wfg-t540p.sh.intel.com>

On Tue, Jan 05, 2016 at 10:30:39PM +0800, Fengguang Wu wrote:
> Hi Guenter,
> 
> On Tue, Jan 05, 2016 at 06:02:47AM -0800, Guenter Roeck wrote:
> > 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.

I can reproduce the problem with Debian's latest gcc:

||/ Name                                 Version                 Architecture            Description
+++-====================================-=======================-=======================-=============================================================================
ii  gcc-5-mips-linux-gnu                 5.3.1-4cross1           amd64                   GNU C compiler
ii  binutils-mips-linux-gnu              2.25.90.20151209-1      amd64                   GNU binary utilities, for mips-linux-gnu target

You can find the build log at the end of this email. 

However I find that the latest mainline no longer has the error.
So let's we ignore this error.

Thanks,
Fengguang
---

REPRODUCE LOG

wfg@inn ~/linux% /c/kernel-tests/reproduce-build 398c7500a 168309855 linus/master gcc-5 mips-jmr3927_defconfig arch/mips/vdso/gettimeofday.c
No patch removed
HEAD is now at 398c750 MIPS: VDSO: Fix build error with binutils 2.24 and earlier

=============== commit 398c7500a ===============
/home/wfg/linux
HEAD is now at 398c750... MIPS: VDSO: Fix build error with binutils 2.24 and earlier
/home/wfg/linux/obj-compiletest

make ARCH=mips jmr3927_defconfig
make ARCH=mips arch/mips/vdso/gettimeofday.o

!!! BUILD ERROR !!!
grep -a -F arch/mips/vdso/gettimeofday.c /tmp/build-err-398c7500a1f5f74e207bd2edca1b1721b3cc1f1e-wfg --color
../arch/mips/vdso/gettimeofday.c:1:0: error: '-march=r3900' requires '-mfp32'
 /*
 ^

=============== PREV commit 74bf8efb5fa6e958d2d7c7917b8bb672085ec0c6 ===============
/home/wfg/linux
Previous HEAD position was 398c750... MIPS: VDSO: Fix build error with binutils 2.24 and earlier
HEAD is now at 74bf8ef... Linux 4.4-rc7
/home/wfg/linux/obj-compiletest

make ARCH=mips jmr3927_defconfig
make ARCH=mips arch/mips/vdso/gettimeofday.o

grep -a -F arch/mips/vdso/gettimeofday.c /tmp/build-err-74bf8efb5fa6e958d2d7c7917b8bb672085ec0c6-wfg --color

=============== linus/master linus/master ===============
/home/wfg/linux
Previous HEAD position was 74bf8ef... Linux 4.4-rc7
HEAD is now at ce1fad2... Merge branch 'keys-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/dhowells/linux-fs
/home/wfg/linux/obj-compiletest

make ARCH=mips jmr3927_defconfig
make ARCH=mips arch/mips/vdso/gettimeofday.o

!!! BUILD ERROR !!!
grep -a -F arch/mips/vdso/gettimeofday.c /tmp/build-err-ce1fad2740c648a4340f6f6c391a8a83769d2e8c-wfg --color

=============== linux-next linux-next/master ===============
/home/wfg/linux
Previous HEAD position was ce1fad2... Merge branch 'keys-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/dhowells/linux-fs
HEAD is now at 8ef79cd... Add linux-next specific files for 20160105
/home/wfg/linux/obj-compiletest

make ARCH=mips jmr3927_defconfig
make ARCH=mips arch/mips/vdso/gettimeofday.o

!!! BUILD ERROR !!!
grep -a -F arch/mips/vdso/gettimeofday.c /tmp/build-err-8ef79cd05e6894c01ab9b41aa918a402fa8022a7-wfg --color
<stdin>:1307:2: warning: #warning syscall copy_file_range not implemented [-Wcpp]
<stdin>:1307:2: warning: #warning syscall copy_file_range not implemented [-Wcpp]
../arch/mips/vdso/gettimeofday.c:1:0: error: '-march=r3900' requires '-mfp32'
 /*
 ^

=============== HEAD commit 168309855 ===============
/home/wfg/linux
Previous HEAD position was 8ef79cd... Add linux-next specific files for 20160105
HEAD is now at 1683098... Linux 4.4-rc8
/home/wfg/linux/obj-compiletest

make ARCH=mips jmr3927_defconfig
make ARCH=mips arch/mips/vdso/gettimeofday.o

!!! BUILD ERROR !!!
grep -a -F arch/mips/vdso/gettimeofday.c /tmp/build-err-168309855a7d1e16db751e9c647119fe2d2dc878-wfg --color
../arch/mips/vdso/gettimeofday.c:1:0: error: '-march=r3900' requires '-mfp32'
 /*
 ^

=============== NEW linus/master HEAD linus/master ===============
/home/wfg/linux
Previous HEAD position was 1683098... Linux 4.4-rc8
HEAD is now at ce1fad2... Merge branch 'keys-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/dhowells/linux-fs
/home/wfg/linux/obj-compiletest

make ARCH=mips jmr3927_defconfig
make ARCH=mips arch/mips/vdso/gettimeofday.o

!!! BUILD ERROR !!!
grep -a -F arch/mips/vdso/gettimeofday.c /tmp/build-err-ce1fad2740c648a4340f6f6c391a8a83769d2e8c-wfg --color

export ARCH=mips

  parent reply	other threads:[~2016-01-06 11:50 UTC|newest]

Thread overview: 32+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2016-01-05  7:23 arch/mips/vdso/gettimeofday.c:1:0: error: '-march=r3900' requires '-mfp32' kbuild test robot
2016-01-05  8:09 ` Guenter Roeck
2016-01-05  8:22   ` Fengguang Wu
2016-01-05 14:02     ` Guenter Roeck
2016-01-05 14:30       ` Fengguang Wu
2016-01-05 15:15         ` Guenter Roeck
2016-01-06 11:50         ` Fengguang Wu [this message]
2016-01-06 11:59           ` Fengguang Wu
2016-01-06 12:09             ` [kbuild-all] " Fengguang Wu
2016-01-05 14:35       ` Ralf Baechle
2016-02-28  8:42 kbuild test robot
2016-02-28 10:09 ` Guenter Roeck
2016-03-06  6:56 kbuild test robot
2016-03-13  9:16 kbuild test robot
2016-03-20  1:56 kbuild test robot
2016-04-03  9:23 kbuild test robot
2016-04-17  6:32 kbuild test robot
2016-07-22 17:28 kbuild test robot
2016-08-01 20:24 kbuild test robot
2016-08-28 11:23 kbuild test robot
2016-09-03 23:54 kbuild test robot
2016-09-14 16:02 kbuild test robot
2016-09-23  2:24 kbuild test robot
2016-10-02  2:39 kbuild test robot
2016-10-16  2:49 kbuild test robot
2016-11-05 23:48 kbuild test robot
2016-11-13  2:01 kbuild test robot
2016-12-11  1:21 kbuild test robot
2017-01-01 17:19 kbuild test robot
2017-01-15  1:51 kbuild test robot
2017-02-05 15:49 kbuild test robot
2017-02-12  0:17 kbuild test robot

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