# Makefile

#Some definitions
SRC_DIR = src
BUILD_DIR = build

LOADER_DIR = module_bootloader
LOADER_NAME = uOS.iso
LOADER_IMG = $(BUILD_DIR)/$(LOADER_NAME)

KERNEL_MAIN = $(SRC_DIR)/main.c
KERNEL_MAIN_OBJ = $(BUILD_DIR)/main.o

ENTRY_ASM = $(SRC_DIR)/start.s
ENTRY_ASM_OBJ = $(BUILD_DIR)/start.o

LINKING_RECIPE = $(SRC_DIR)/linker.ld

KERNEL_IMG = $(BUILD_DIR)/ukern.elf

QEMU = qemu-system-i386
GCC = i686-elf-gcc

#Actual recipe
all: $(KERNEL_IMG)

$(BUILD_DIR):
	mkdir -p $(BUILD_DIR)

$(KERNEL_MAIN_OBJ):
	$(GCC) -std=gnu99 -ffreestanding -g -c $(KERNEL_MAIN) -o $(BUILD_DIR)/main.o

$(ENTRY_ASM_OBJ):
	$(GCC) -std=gnu99 -ffreestanding -g -c $(ENTRY_ASM) -o $(ENTRY_ASM_OBJ)

#now kith (link)
$(KERNEL_IMG): $(KERNEL_MAIN_OBJ) $(ENTRY_ASM_OBJ)
	$(GCC) -ffreestanding -nostdlib -g -T $(LINKING_RECIPE) $(ENTRY_ASM_OBJ) $(KERNEL_MAIN_OBJ) -o $(KERNEL_IMG) -lgcc

run: all
	$(QEMU) -kernel $(KERNEL_IMG)

$(LOADER_IMG): $(KERNEL_IMG)
	cp $(KERNEL_IMG) $(LOADER_DIR)/src/boot/; \
	cd $(LOADER_DIR);	\
	make all;			\
	cd ..;				\
	cp $(LOADER_DIR)/$(LOADER_IMG) $(BUILD_DIR)/

iso: $(LOADER_IMG)

run_iso: iso
	$(QEMU) -cdrom $(LOADER_IMG)

clean:
	rm -rf $(BUILD_DIR)/*