On Fri, Mar 19, 2021 at 4:56 AM Arnd Bergmann <arnd@xxxxxxxx> wrote: > > On Fri, Mar 19, 2021 at 12:38 PM John Paul Adrian Glaubitz > <glaubitz@xxxxxxxxxxxxxxxxxxx> wrote: > > On 3/19/21 12:31 PM, Arnd Bergmann wrote: > > > On Fri, Mar 19, 2021 at 8:36 AM Naresh Kamboju > > > <naresh.kamboju@xxxxxxxxxx> wrote: > > >> > > >> Linux mainline master build breaks for sparc defconfig. > > >> There are multiple errors / warnings with clang-12 and clang-11 and 10. > > >> - sparc (defconfig) with clang-12, clang-11 and clang-10 > > >> - sparc (tinyconfig) with clang-12, clang-11 and clang-10 > > >> - sparc (allnoconfig) with clang-12, clang-11 and clang-10 > > >> > > >> make --silent --keep-going --jobs=8 > > >> O=/home/tuxbuild/.cache/tuxmake/builds/1/tmp ARCH=sparc > > >> CROSS_COMPILE=sparc64-linux-gnu- 'HOSTCC=sccache clang' 'CC=sccache > > >> clang' > > > > > > I don't think anyone has successfully built a sparc kernel with clang, > > > and I don't > > > think it's worth trying either, given how little upstream work the > > > sparc port sees overall. > > > > We'll get there. There are some other SPARC-related clang bugs that need > > to be squashed first. We have made quite some improvements and it's actually > > maintained by the community. Of course, we don't have a commercial backer > > but that shouldn't be necessary for open source to work. > > I meant there is no point for Naresh to do it as part of his build > testing with tuxmake. > If someone else gets it working, they can tell Naresh to try again, but until > then, I'd limit clang regression testing to x86, arm, powerpc, s390, mips, riscv > and arc. We definitely cannot yet build arc. $ cmake ... -DLLVM_EXPERIMENTAL_TARGETS_TO_BUILD="ARC" $ ARCH=arc CROSS_COMPILE=arc-linux-gnu- make LLVM=1 -j72 defconfig vmlinux ... clang-13: error: unknown argument: '-mmedium-calls' clang-13: error: unknown argument: '-fsection-anchors' clang-13: error: unknown argument: '-mlock' clang-13: error: unknown argument: '-mswape' clang-13: error: unknown argument: '-mno-sdata' clang-13: error: unknown argument: '-fcall-used-gp' -- Thanks, ~Nick Desaulniers
