On Tue, Jun 5, 2018 at 6:06 PM, Guenter Roeck <linux@xxxxxxxxxxxx> wrote: > On Tue, Jun 05, 2018 at 04:31:00PM +0200, Arnd Bergmann wrote: >> On Tue, Jun 5, 2018 at 3:52 PM, Guenter Roeck <linux@xxxxxxxxxxxx> wrote: >> > Hi Arnd, >> > >> > when using the ppc64 compiler from kernel.org, I see the following problems >> > when trying to compile ppc:allnoconfig in v4.14.y or v4.16.y. >> > >> > gcc 7.3.0: Compilation of kernel.cpu.o hangs >> > >> > The problem goes away if I apply the following two patches (tested with >> > 4.16.y) >> > >> > 17a2f1ced028 cpu/hotplug: Merge cpuhp_bp_states and cpuhp_ap_states >> > fcb3029a8d89 cpu/hotplug: Fix unused function warning >> >> This is probably the same as >> https://gcc.gnu.org/bugzilla/show_bug.cgi?id=84038 >> >> I thought I had included the fix in my builds. >> > Guess not. I probably had it in one build and then forgot about it when I did a rebuild of 7.3 :( I'm still planning to do a new set of gcc-7.3 binaries (or maybe 7.4 if that gets released soon) and should try to remember doing that. >> > I think it may have cached the flags from the other compiler version. > "make mrproper" prior to "make defconfig" took care of the issue. > > However, that doesn't really help - I get lots of > error: 'sys_spu_create' alias between functions of incompatible types > error: 'strncpy' output truncated before terminating nul > if I try to use gcc 8.1.0. > > Oh well. I'll try gcc 6.4.0 next. On the upside, those two errors are just a result of arch/power/*/*.c getting built with -Werror, they are warnings that gcc-8 introduced that we should either shut up or fix. Arnd
