include .config
OBJ_DIR != echo $(CONFIG_OBJ_DIR)
include toolchain.makefile

.PHONY: default clean test todo run menuconfig
default: $(OBJ_DIR)/glitch.elf

include libk/makefile
include src/makefile
include drivers/makefile

AS_OBJ := $(addprefix $(OBJ_DIR)/, $(AS_OBJ))
CXX_OBJ := $(addprefix $(OBJ_DIR)/, $(CXX_OBJ))
CXX_DEP = $(CXX_OBJ:%.o=%.d)
CXX_TEST_OBJ := $(addprefix $(OBJ_DIR)/, $(CXX_TEST_OBJ))
CXX_INCLUDE := $(addprefix -I, $(CXX_INCLUDE))
CXX_SYSTEM_INCLUDE := $(addprefix -isystem, $(CXX_SYSTEM_INCLUDE))

$(OBJ_DIR)/glitch.elf: $(autogen) $(AS_OBJ) $(CXX_OBJ) linker.ld
	@echo "  LD   $@"
	@$(LD) $(LD_FLAGS) -o $@ $(AS_OBJ) $(CXX_OBJ)

$(AS_OBJ): $(OBJ_DIR)/%.o: %.S
	@mkdir -p $(@D)
	@echo "  AS   $<"
	@$(AS) -target $(TARGET) -nostdlib -Wall -Wextra -c $^ -o $@

-include $(CXX_DEP)
$(CXX_OBJ): $(OBJ_DIR)/%.o : %.cc
	@mkdir -p $(@D)
	@echo "  CXX  $<"
	@$(CXX) -target $(TARGET) $(CXX_FLAGS) $(CXX_INCLUDE) $(CXX_SYSTEM_INCLUDE) -MMD -c $< -o $@

$(CXX_TEST_OBJ): $(OBJ_DIR)/%.o : %.cc
	@mkdir -p $(@D)
	@echo "  TEST $<"
	@$(TEST_CXX) -target $(TARGET) $(CXX_TEST_FLAGS) $(CXX_INCLUDE) -MMD -c $< -o $@

clean:
	@rm -rf $(autogen) $(AS_OBJ) $(CXX_OBJ) $(CXX_DEP) $(CXX_TEST_OBJ) $(OBJ_DIR)/glitch.elf $(OBJ_DIR)/isodir
	@make -C tools/kconfig OBJ_DIR=$(CURDIR)/$(OBJ_DIR)/kconfig clean

# testing
test: $(CXX_TEST_OBJ)

todo:
	@grep TODO -r libk/ src/ drivers/

# disk image
$(OBJ_DIR)/glitch.iso: $(OBJ_DIR)/glitch.elf grub/grub.cfg
	@mkdir -p $(OBJ_DIR)/isodir/boot/grub
	$(GRUB_FILE) --is-x86-multiboot2 $<
	@cp $< $(OBJ_DIR)/isodir/boot/glitch.elf
	$(GRUB_SCRIPT) grub/grub.cfg
	@cp grub/grub.cfg $(OBJ_DIR)/isodir/boot/grub/grub.cfg
	@$(GRUB_MKRESCUE) -o $@ $(OBJ_DIR)/isodir

run: $(OBJ_DIR)/glitch.iso
	@$(EMU) $< -no-reboot -no-shutdown -monitor stdio

# menuconfig and mconf
CONF  := $(OBJ_DIR)/kconfig/conf
MCONF := $(OBJ_DIR)/kconfig/mconf
$(CONF) $(MCONF):
	@make -C tools/kconfig OBJ_DIR=$(CURDIR)/$(OBJ_DIR)/kconfig $(CURDIR)/$@

menuconfig: Kconfig $(MCONF)
	$(MCONF) $<