Why do we have this series, when it is almost identical to the one sent by Harish Sadineni ?
Bruce On Tue, Jul 7, 2026 at 10:30 PM mark.yang via lists.openembedded.org <[email protected]> wrote: > > From: "mark.yang" <[email protected]> > > Building the kernel with clang currently means overriding TOOLCHAIN and > the KERNEL_* variables in a bbappend. The kernel builds, but modules and > make-mod-scripts keep the gcc defaults and run the shared kernel build > tree with the other compiler. kbuild then re-runs syncconfig against the > shared .config and silently drops compiler-dependent options: a > CONFIG_CFI_CLANG kernel loses kCFI as soon as any module is built. > Documentation/kbuild/llvm.rst requires the same toolchain for every make > invocation against one tree. > > This series adds a KERNEL_TOOLCHAIN switch so the kernel, modules and > make-mod-scripts move to clang together. gcc remains the default. > > Tested on qemux86-64 with clang and gcc: both toolchains > build linux-yocto, make-mod-scripts and cryptodev-module, the shared > .config stays consistent across module builds (also with ld-is-lld), > and core-image-sato boots. > > mark.yang (3): > module.bbclass/make-mod-scripts: inhibit default dependencies > kernel-yocto: export CLANG_FLAGS for the kconfiglib config audit > kernel-arch: add KERNEL_TOOLCHAIN for building the kernel with clang > > meta/classes-recipe/kernel-arch.bbclass | 13 ++++++++++++- > meta/classes-recipe/kernel-yocto.bbclass | 7 +++++++ > meta/classes-recipe/module.bbclass | 5 +++++ > .../make-mod-scripts/make-mod-scripts_1.0.bb | 5 +++++ > 4 files changed, 29 insertions(+), 1 deletion(-) > > > > -- - Thou shalt not follow the NULL pointer, for chaos and madness await thee at its end - "Use the force Harry" - Gandalf, Star Trek II
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