# mono-ask.mk
# Custom wrapper to build the NXP ASK for the monok8s Alpine/musl ecosystem

# Define default paths and cross-compilers
KDIR?= /src/linux
ASK_DIR?= $(CURDIR)
ARCH?= arm64
GNU_CROSS?= aarch64-linux-gnu-
MUSL_HOST?= aarch64-linux-musl

.PHONY: prepare-kernel build-kernel modules userspace dist

# 1. Patch the kernel and merge our custom Kubernetes configuration
prepare-kernel:
	@echo "--> Patching the Linux kernel with NXP DPAA extensions..."
	# The -N flag and | true prevents failure if the patch is already applied
	cd $(KDIR) && patch -p1 -N < $(ASK_DIR)/patches/kernel/003-mono-gateway-ask-kernel_linux_6_12.patch | true
	@echo "--> Merging NXP defconfig with Kubernetes extra config..."
	cp $(ASK_DIR)/config/kernel/defconfig $(KDIR)/.config
	cd $(KDIR) && ./scripts/kconfig/merge_config.sh -m .config /src/kernel-extra.config
	$(MAKE) -C $(KDIR) ARCH=$(ARCH) CROSS_COMPILE=$(GNU_CROSS) olddefconfig
	/src/ensure-kconfig.sh $(KDIR)/.config /src/kernel-extra.config

# 2. Build the kernel tree (mandatory before out-of-tree modules can be built)
build-kernel: prepare-kernel
	@echo "--> Building the Linux kernel natively..."
	$(MAKE) -C $(KDIR) ARCH=$(ARCH) CROSS_COMPILE=$(GNU_CROSS) -j$$(nproc) Image modules

# 3. Build the ASK out-of-tree modules using the vendor Makefile
modules: build-kernel
	@echo "--> Building ASK out-of-tree modules..."
	$(MAKE) -f Makefile modules KDIR=$(KDIR) CROSS_COMPILE=$(GNU_CROSS) ARCH=$(ARCH)

# 4. Build the ASK userspace daemons using the musl cross-compiler
userspace:
	@echo "--> Building ASK sources and libraries..."
	$(MAKE) -f Makefile sources KDIR=$(KDIR) CROSS_COMPILE=$(MUSL_HOST)- ARCH=$(ARCH) HOST=$(MUSL_HOST)
	@echo "--> Building ASK userspace executables statically..."
	$(MAKE) -f Makefile userspace KDIR=$(KDIR) CROSS_COMPILE=$(MUSL_HOST)- ARCH=$(ARCH) HOST=$(MUSL_HOST) CC="$(MUSL_HOST)-gcc -static" CXX="$(MUSL_HOST)-g++ -static"

# 5. Extract artifacts
dist:
	$(MAKE) -f Makefile dist