On Wed, May 30, 2018 at 11:46:45AM -0700, Guenter Roeck wrote: > On Wed, May 30, 2018 at 03:55:04PM +0200, Arnd Bergmann wrote: > > On Wed, May 30, 2018 at 3:31 PM, Guenter Roeck <linux@xxxxxxxxxxxx> wrote: > > > On 05/30/2018 02:27 AM, Arnd Bergmann wrote: > > >> > > >> On Mon, May 28, 2018 at 3:48 PM, Guenter Roeck <linux@xxxxxxxxxxxx> wrote: > > >>> > > >>> Hi Greg, > > >>> > > >>> please apply the following patches. > > >>> > > >>> to v4.4-stable and older: > > >>> > > >>> cb36af3e48be sh: New gcc support > > >>> to support gcc 8.1.0 for sh > > >>> > > >>> to v4.9-stable and older: > > >>> > > >>> 009615ab7fd4 USB: serial: cp210x: use tcflag_t to fix incompatible > > >>> pointer > > >>> type > > >>> to support gcc 7.3.0 for sparc > > >>> > > >>> Copying Arnd - I can't get sparc images to compile with gcc 8.1.0. Any > > >>> idea > > >> > > >> > > >> No, sorry. I've just tried it again and couldn't find any problems with my > > >> gcc-8.1 binaries building either sparc32_defconfig or sparc64_defconfig. > > >> > > > > > > Interesting. With sparc64-linux-gcc (GCC) 8.1.0 from kernel.org: > > > > > > make ARCH=sparc64 CROSS_COMPILE=sparc64-linux- allmodconfig > > > make ARCH=sparc64 CROSS_COMPILE=sparc64-linux- > > > arch/sparc/kernel/sys_sparc_64.o > > > > > > results in: > > > > > > ./include/linux/syscalls.h:233:18: error: > > > 'sys_sparc64_personality' alias between functions of incompatible > > > types > > > 'long int(long unsigned int)' and 'long int(long int)' > > > [-Werror=attribute-alias] > > > > > > and many more. > > > > > > Presumably this is due to > > > > > > arch/sparc/kernel/Makefile:ccflags-y := -Werror > > > > Right, I have disabled that warning locally, so I didn't get > > it despite the -Werror. > > > > Would it make sense to add > KBUILD_CFLAGS += $(call cc-option,-Wno-attribute-alias) > to the sparc Makefile ? It seems to fix the problem for me, and it would > be easier to backport than a more comprehensive fix. Why is that not an option enabled for all arches right now for gcc-8? thanks, greg k-h
