Toolchains (GCC & Clang 9 and 11) with libraries for compiling Android kernel.

[Not noob friendly.]

Getting Started

How to use these toolchains for compiling android Kernels ?

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1. Clone this toolchain repo in tools folder

$ git clone https://github.com/mranonymz/android-kernel-tools.git tools

2. Set path according to your choice.

	PATH="tools/build-tools/linux-x86/bin:$PATH"
	PATH="tools/build-tools/path/linux-x86:$PATH"
	PATH="tools/gcc/linux-x86/aarch64/aarch64-linux-android-4.9/bin:$PATH"
	PATH="tools/gcc/linux-x86/arm/arm-linux-androideabi-4.9/bin:$PATH"
	PATH="tools/clang/host/linux-x86/**clang-r407598**/bin:$PATH"
	PATH="tools/misc/linux-x86/lz4:$PATH"
	PATH="tools/misc/linux-x86/dtc:$PATH"
	PATH="tools/misc/linux-x86/libufdt:$PATH"
	export LD_LIBRARY_PATH="tools/clang/host/linux-x86/**clang-r407598**/lib64:$LD_LIBRARY_PATH"

Here clang-r353983d for AOSP clang 9.0.4 and clang-r399163b for AOSP clang 11.0.5. and clang-r407598 for AOSP clang 12.0.1.

3. Use these command for compiling with clang.

$ make \
  O=out \
  ARCH=arm64 \
  SUBARCH=ARM64 \
  CC=clang \
  HOSTCC=clang \
  HOSTCXX=clang++ \
  CLANG_TRIPLE=aarch64-linux-gnu- \
  CROSS_COMPILE=aarch64-linux-android- \
  CROSS_COMPILE_ARM32=arm-linux-androideabi- \
  ${DEVICE}_defconfig

4. Use this command for compiling only with gcc.

$ make \
  O=out \
  ARCH=arm64 \
  SUBARCH=ARM64 \
  CLANG_TRIPLE=aarch64-linux-gnu- \
  CROSS_COMPILE=aarch64-linux-android- \
  CROSS_COMPILE_ARM32=arm-linux-androideabi- \
  ${DEVICE}_defconfig

Here ${DEVICE}_defconfig is the kernel config file used to compile kernel.

It will be easy to compile kernel with a bash script. Make a bash script in kernel folder and set toolchain path according to your folders.

You can use one like This.

All source credit goes to : Android Open Source Project

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