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Message-ID: <20160105143039.GA5772@wfg-t540p.sh.intel.com> Date: Tue, 5 Jan 2016 22:30:39 +0800 From: Fengguang Wu <fengguang.wu@...el.com> To: Guenter Roeck <linux@...ck-us.net> Cc: kbuild-all@...org, "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>, Ralf Baechle <ralf@...ux-mips.org> Subject: Re: arch/mips/vdso/gettimeofday.c:1:0: error: '-march=r3900' requires '-mfp32' 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. > > 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 ? These are the installed version in my Debian: ||/ Name Version Architecture Description +++-====================================-=======================-=======================-============================================================================= ii gcc-5-mips-linux-gnu 5.2.1-16cross1 amd64 GNU C compiler ii gcc-5-mipsel-linux-gnu 5.2.1-16cross1 amd64 GNU C compiler ii binutils-mips-linux-gnu 2.25-8 amd64 GNU binary utilities, for mips-linux-gnu target ii binutils-mipsel-linux-gnu 2.25-8 amd64 GNU binary utilities, for mipsel-linux-gnu target You may check if these packages are available on Ubuntu. Anyway the versions are close to yours. This is interesting, I'll do more checks. Thanks, Fengguang > >>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 > > -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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