reproduce (this is a W=1 build):
        git clone https://github.com/intel/lkp-tests.git ~/lkp-tests
        # https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=0ae9c3213c2ca34f7e7ebad1436267778d37ba9f
        git remote add linus https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
        git fetch --no-tags linus master
        git checkout 0ae9c3213c2ca34f7e7ebad1436267778d37ba9f
        # save the config file
        mkdir build_dir && cp config build_dir/.config
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang-19 ~/lkp-tests/kbuild/make.cross W=1 O=build_dir ARCH=x86_64 olddefconfig
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang-19 ~/lkp-tests/kbuild/make.cross W=1 O=build_dir ARCH=x86_64 SHELL=/bin/bash ./ arch/x86/crypto/ arch/x86/entry/ arch/x86/events/amd/ arch/x86/kernel/ arch/x86/kvm/ arch/x86/mm/ drivers/ fs/fuse/ kernel/ lib/ sound/firewire/ sound/soc/