BR2_EXTERNAL := $(CURDIR)
BR_DIR := $(CURDIR)/buildroot
OUTPUT_DIR := $(CURDIR)/output

BR_MAKE := $(MAKE) -C $(BR_DIR) O=$(CURDIR)/output/ BR2_EXTERNAL=$(BR2_EXTERNAL)

.PHONY: init-submodule
init-submodule:
	@if [ ! -d "$(BR_DIR)/.git" ] && [ ! -f "$(BR_DIR)/Makefile" ]; then \
		echo ">>> Initializing Buildroot submodule..."; \
		git submodule update --init --recursive -- $(BR_DIR); \
	fi

.PHONY: all
all: init-submodule
	$(BR_MAKE)

# Pass all other targets through to Buildroot
.PHONY: %
%: init-submodule
	$(BR_MAKE) $@

# Shortcut for setting up the defconfig
.PHONY: setup
setup: init-submodule
	$(BR_MAKE) arcade_defconfig