build_kernel.sh

#!/usr/bin/env bash

mkdir -p out

ANDROID_VERSION="10.0.0"
ARCH="arm64"
export ANDROID_VERSION ARCH

BUILD_CROSS_COMPILE="/opt/aarch64-linux-android-4.9/bin/aarch64-linux-android-"
KERNEL_LLVM_BIN="/opt/qcom-clang-8/bin/clang"
CLANG_TRIPLE="aarch64-linux-gnu-"
KERNEL_MAKE_ENV="DTC_EXT=$(pwd)/tools/dtc CONFIG_BUILD_ARM64_DT_OVERLAY=y"

make -C $(pwd) \
  O=$(pwd)/out \
  $KERNEL_MAKE_ENV \
  CFP_CC=$KERNEL_LLVM_BIN \
  CROSS_COMPILE=$BUILD_CROSS_COMPILE \
  REAL_CC=$KERNEL_LLVM_BIN \
  CLANG_TRIPLE=$CLANG_TRIPLE \
  leankernel_defconfig

make -j$(nproc --all) -C $(pwd) \
  O=$(pwd)/out \
  $KERNEL_MAKE_ENV \
  CFP_CC=$KERNEL_LLVM_BIN \
  CROSS_COMPILE=$BUILD_CROSS_COMPILE \
  REAL_CC=$KERNEL_LLVM_BIN \
  CLANG_TRIPLE=$CLANG_TRIPLE

cp -v \
  out/arch/arm64/boot/Image-dtb \
  $(pwd)/arch/arm64/boot/Image-dtb