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

.PHONY: default clean test check-grub run
default: 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))

glitch.elf: $(autogen) $(AS_OBJ) $(CXX_OBJ)
	@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) $(CXX_TEST_OBJ): $(OBJ_DIR)/%.o : %.cc
	@mkdir -p $(@D)
	@echo "  CXX $<"
	@$(CXX) -target $(TARGET) $(CXX_FLAGS) $(CXX_INCLUDE) $(CXX_SYSTEM_INCLUDE) -MMD -c $< -o $@

clean:
	@rm -rf $(autogen) $(AS_OBJ) $(CXX_OBJ) $(CXX_DEP) $(CXX_TEST_OBJ) glitch.elf isodir

# testing
test: $(CXX_TEST_OBJ)

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

run: glitch.iso
	@$(EMU) $<