Hi Ralf, On Wed, Apr 20, 2016 at 03:30:21PM +0200, Ralf Baechle wrote: > On Wed, Apr 20, 2016 at 01:44:28PM +0800, kbuild test robot wrote: > > > FYI, the error/warning still remains. > > > > tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git > > master > > head: 12566cc35d0e68308bde7aad615743d560cb097b > > commit: c1a0e9bc885d46e519fd87d35af6a7937abfb986 MIPS: Allow compact branch > > policy to be changed > > date: 6 months ago > > config: mips-malta_qemu_32r6_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 c1a0e9bc885d46e519fd87d35af6a7937abfb986 > > # save the attached .config to linux build tree > > make.cross ARCH=mips > > > > All errors (new ones prefixed by >>): > > > > >> mipsel-linux-gnu-gcc: error: unrecognized command line option > > >> '-mcompact-branches=optimal' > > >> mipsel-linux-gnu-gcc: error: unrecognized command line option > > >> '-mcompact-branches=optimal' > > -mcompact-branches=optimal is an option for the latest version of the MIPS > architecture which is enabled by mips-malta_qemu_32r6_defconfig but your > compiler is too old, doesn't support R6. Unfortunately there's no simple > way to run a test on the build environment from kconfig or even before > kconfig runs so we've just ignord this particular build issue. Plus > there being the additional issue that we only know the toolchain to be > used after certain options have been picked.
We are running Debian's mips cross compiler. % mips-linux-gnu-gcc --version mips-linux-gnu-gcc (Debian 5.2.1-16) 5.2.1 20150903 Copyright (C) 2015 Free Software Foundation, Inc. How about temporarily disable that error, until we upgrade to a new gcc version which supports the -mcompact-branches option? Thanks, Fengguang
