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' clang: error: unknown argument: '-mno-fpu' clang: error: unknown argument: '-fcall-used-g5' clang: error: unknown argument: '-fcall-used-g7' make[2]: *** [/builds/linux/scripts/Makefile.build:116: scripts/mod/devicetable-offsets.s] Error 1 clang: error: unknown argument: '-mno-fpu' clang: error: unknown argument: '-fcall-used-g5' clang: error: unknown argument: '-fcall-used-g7' make[2]: *** [/builds/linux/scripts/Makefile.build:271: scripts/mod/empty.o] Error 1
Reported-by: Naresh Kamboju naresh.kamboju@linaro.org
build link, https://gitlab.com/Linaro/lkft/mirrors/torvalds/linux-mainline/-/jobs/111084...
steps to reproduce: -------------------------- # TuxMake is a command line tool and Python library that provides # portable and repeatable Linux kernel builds across a variety of # architectures, toolchains, kernel configurations, and make targets. # # TuxMake supports the concept of runtimes. # See https://docs.tuxmake.org/runtimes/, for that to work it requires # that you install podman or docker on your system. # # To install tuxmake on your system globally: # sudo pip3 install -U tuxmake # # See https://docs.tuxmake.org/ for complete documentation.
tuxmake --runtime podman --target-arch sparc --toolchain clang-12 --kconfig defconfig
-- Linaro LKFT https://lkft.linaro.org
On Fri, Mar 19, 2021 at 8:36 AM Naresh Kamboju naresh.kamboju@linaro.org 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.
Arnd
On 3/19/21 12:31 PM, Arnd Bergmann wrote:
On Fri, Mar 19, 2021 at 8:36 AM Naresh Kamboju naresh.kamboju@linaro.org 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.
Adrian
On Fri, Mar 19, 2021 at 12:38 PM John Paul Adrian Glaubitz glaubitz@physik.fu-berlin.de wrote:
On 3/19/21 12:31 PM, Arnd Bergmann wrote:
On Fri, Mar 19, 2021 at 8:36 AM Naresh Kamboju naresh.kamboju@linaro.org 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.
Arnd
On 3/19/21 12:56 PM, Arnd Bergmann wrote:
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.
It's definitely a useful report as I haven't done any tests in this regard yet and we're certainly interested in getting this to work. We previously had Nick give a session on building the kernel with clang in our monthly m68k meeting [1] and he said, they are interested in supporting as many architectures as possible in their efforts.
Adrian
On Fri, Mar 19, 2021 at 4:56 AM Arnd Bergmann arnd@arndb.de wrote:
On Fri, Mar 19, 2021 at 12:38 PM John Paul Adrian Glaubitz glaubitz@physik.fu-berlin.de wrote:
On 3/19/21 12:31 PM, Arnd Bergmann wrote:
On Fri, Mar 19, 2021 at 8:36 AM Naresh Kamboju naresh.kamboju@linaro.org 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'
-
Arnd Bergmann -
John Paul Adrian Glaubitz -
Naresh Kamboju -
Nick Desaulniers