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
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