TG-332: Adding github action to build linux kernel on branch tg-v6.18 #66

	name: Build Linux Kernel (siklu_arm64_defconfig)

	on:
	workflow_dispatch:
	push:
	branches:
	- tg-v6.18
	pull_request:
	branches:
	- tg-v6.18

	jobs:
	build:
	runs-on: ubuntu-latest
	env:
	ARCH: arm64
	CROSS_COMPILE: aarch64-linux-gnu-
	steps:
	- name: Log runner CPU info
	run: \|
	echo "CPU core count: $(nproc)"
	echo "Processor info:"
	lscpu

	- name: Install dependencies
	run: \|
	sudo apt-get update
	sudo apt-get install -y build-essential bc flex bison libssl-dev libncurses-dev crossbuild-essential-arm64 gcc-aarch64-linux-gnu g++-aarch64-linux-gnu

	- name: Checkout repository
	uses: actions/checkout@v4

	- name: Configure kernel (siklu_arm64_defconfig )
	run: make ARCH=arm64 siklu_arm64_defconfig

	- name: Cache build dependencies and kernel outputs
	uses: actions/cache@v4
	with:
	# --- Optimized Cache Path: Targeting ALL generated, costly artifacts ---
	path: \|
	.config
	vmlinux
	arch/arm64/boot/Image
	Module.symvers
	modules.order
	vmlinux.o
	*/.ko
	*/.o
	*/.cmd
	*/.d
	*/.lds
	*/.s
	*/.dtb
	include/generated/utsrelease.h
	include/generated/compile.h

	# --- Integrity Cache Key: Ensures cache is reused only if core inputs are identical ---
	key: ${{ runner.os }}-kernel-${{ hashFiles('.config', 'arch/arm64/Makefile') }}
	restore-keys: \|
	${{ runner.os }}-kernel-

	- name: Build kernel with arm64 architecture
	run: make -j$(nproc)

	- name: Archive kernel image
	uses: actions/upload-artifact@v4
	with:
	name: kernel-image
	path: arch/arm64/boot/Image

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