Script snippet for building ChromeOS Crostini/Termina kernel

build-termina-kernel.sh

RELEASE=release-R114-15437.B-chromeos-5.10
LLVM_VERSION=18

curl -L https://apt.llvm.org/llvm.sh | sudo bash -s "${LLVM_VERSION}"

for f in clang clang++ ld.lld llvm-objdump llvm-ar llvm-nm llvm-strip llvm-objcopy llvm-readelf; do
  sudo ln -sf $f-$LLVM_VERSION /usr/bin/$f
done

git clone https://chromium.googlesource.com/chromiumos/third_party/kernel.git -b ${RELEASE} --depth=1

cd kernel

CHROMEOS_KERNEL_FAMILY=termina ./chromeos/scripts/prepareconfig container-vm-aarch64
make LLVM=1 LLVM_IAS=1 olddefconfig
make LLVM=1 LLVM_IAS=1 menuconfig
make LLVM=1 LLVM_IAS=1 bzImage -j8

make LLVM=1 LLVM_IAS=1 INSTALL_MOD_PATH="$PWD/out-modules" modules -j$(nproc)
make LLVM=1 LLVM_IAS=1 INSTALL_MOD_PATH="$PWD/out-modules" modules_install

sudo apt install rsync
make LLVM=1 LLVM_IAS=1 INSTALL_HDR_PATH="$PWD/out-headers" headers_install