On Tue, Oct 22, 2024 at 5:17 AM Nathan Chancellor <nathan@xxxxxxxxxx> wrote: > > Hi Andreas, > > On Wed, Jul 17, 2024 at 11:10:14PM +0700, Koakuma wrote: > > This changes the CFLAGS for building the SPARC kernel so that it can be > > built with clang, as a follow up from the discussion in this thread: > > > > https://lore.kernel.org/lkml/JAYB7uS-EdLABTR4iWZdtFOVa5MvlKosIrD_cKTzgeozCOGRM7lhxeLigFB1g3exX445I_W5VKB-tAzl2_G1zCVJRQjp67ODfsSqiZWOZ9o=@protonmail.com/T/#u > ... > > Building with these changes still result in a working kernel, > > at least for Sun T5120, Oracle T4-1, and qemu virtual machines. > > > > On the LLVM side, the effort for building Linux/SPARC is tracked here: > > https://github.com/llvm/llvm-project/issues/40792 > > > > Signed-off-by: Koakuma <koachan@xxxxxxxxxxxxxx> > > --- > > Changes in v2: > > - Remove the -mv8plus change; it will be handled on clang side: > > https://github.com/llvm/llvm-project/pull/98713 > > - Add CLANG_TARGET_FLAGS as suggested in v1 review. > > - Link to v1: https://lore.kernel.org/r/20240620-sparc-cflags-v1-1-bba7d0ff7d42@xxxxxxxxxxxxxx > > > > --- > > Koakuma (2): > > sparc/build: Remove all usage of -fcall-used* flags > > sparc/build: Add SPARC target flags for compiling with clang > > > > arch/sparc/Makefile | 4 ++-- > > arch/sparc/vdso/Makefile | 2 +- > > scripts/Makefile.clang | 1 + > > 3 files changed, 4 insertions(+), 3 deletions(-) > > Would you be able to help move this series [1] and its companion patch > for the vDSO [2] along to Linus for 6.13? If you are not able to for > whatever reason but the changes look reasonable to you, would you be > able to provide an Ack so it can be chauffeured by someone else, such as > Masahiro/Kbuild or Andrew/-mm? > > For the record, I retested these three changes on top of 6.12-rc4, where > they still apply cleanly. Now that the LLVM PR linked above (98713) has > been merged into LLVM main, a clang built straight from llvm-project.git > can build the kernel with this series (I tested at dca43a1c82f1). > > [1]: https://lore.kernel.org/all/20240717-sparc-cflags-v2-0-259407e6eb5f@xxxxxxxxxxxxxx/ > [2]: https://lore.kernel.org/all/20240808-sparc-shr64-v2-1-fd18f1b2cea9@xxxxxxxxxxxxxx/ > > Cheers, > Nathan 2/2 should update the "Supported Architectures" of Documentation/kbuild/llvm.rst if this is adding a new architecture support. -- Best Regards Masahiro Yamada
