Geert Uytterhoeven <[email protected]> writes: > On Mon, Jul 13, 2020 at 11:51 AM Geert Uytterhoeven > <[email protected]> wrote: >> JFYI, when comparing v5.8-rc5[1] to v5.8-rc4[3], the summaries are: >> - build errors: +3/-0 > > + /kisskb/src/include/linux/compiler-gcc.h: error: #error Sorry, > your compiler is too old - please upgrade it.: => 15:3 > + /kisskb/src/include/linux/compiler.h: error: implicit declaration > of function '_Generic' [-Werror=implicit-function-declaration]: => > 309:2 > + /kisskb/src/include/linux/compiler_types.h: error: expected > expression before 'char': => 265:5 > > arcompact/axs101_defconfig, which uses a pre-v4.9 gcc: > > Compiler: arcompact (arc-buildroot-linux-uclibc-gcc (Buildroot > 2015.08.1) 4.8.4 / GNU ld (GNU Binutils) 2.23.2) > > While at it, you may also want to upgrade > > Compiler: arcv2 (arc-linux-gcc.br_real (Buildroot > 2016.11-git-00613-ge98b4dd) 6.2.1 20160824 / GNU ld (GNU Binutils) > 2.27.51.20160928) > > as it has a buggy definition of size_t, and causes bogus warnings like: > >> + /kisskb/src/drivers/gpu/drm/drm_managed.c: warning: format '%zu' expects >> argument of type 'size_t', but argument 4 has type 'unsigned int' >> [-Wformat=]: => 205:23 >> + /kisskb/src/drivers/gpu/drm/drm_managed.c: warning: format '%zu' expects >> argument of type 'size_t', but argument 6 has type 'unsigned int' >> [-Wformat=]: => 67:23 >> + /kisskb/src/include/linux/kern_levels.h: warning: format '%zd' expects >> argument of type 'signed size_t', but argument 2 has type 'ssize_t {aka >> int}' [-Wformat=]: => 5:18 >> + /kisskb/src/kernel/dma/pool.c: warning: format '%zu' expects argument of >> type 'size_t', but argument 5 has type 'unsigned int' [-Wformat=]: => 249:16
Thanks. It seems the kernel.org 10.1.0 toolchain can build both arcv2 and arcompact, so I've added an arc-gcc10 and moved both defconfigs to that toolchain. Hopefully that will work. cheers
