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NAME = os
CC = i686-elf-gcc
ASM = i686-elf-as
CFLAGS = -std=gnu99 -ffreestanding -O2 -Wall -Wextra -g
LFLAGS = -ffreestanding -O2 -nostdlib -lgcc -g
SDIR = src
ODIR = obj
SRC = $(wildcard $(SDIR)/*.c)
OBJ = $(patsubst $(SDIR)/%.c,$(ODIR)/%.o,$(SRC))
ASMODIR = asm_obj
ASMSRC = $(wildcard $(SDIR)/*.s)
ASMOBJ = $(patsubst $(SDIR)/%.s,$(ASMODIR)/%.o,$(ASMSRC))
default: kernel.bin
kernel.bin: $(OBJ) $(ASMOBJ)
$(CC) -T linker.ld -o $@ $^ $(LFLAGS)
$(ODIR)/%.o: $(SDIR)/%.c $(ODIR)
$(CC) $(CFLAGS) -c -o $@ $<
$(ASMODIR)/%.o: $(SDIR)/%.s $(ASMODIR)
$(ASM) -g -c -o $@ $<
$(NAME).iso: kernel.bin
mkdir -p isodir/boot/grub
cp $< isodir/boot/
cp grub.cfg isodir/boot/grub/grub.cfg
grub-mkrescue -o $@ isodir
.PHONY: test debug
test: os.iso
qemu-system-i386 -cdrom os.iso
debug: kernel.bin
qemu-system-i386 -s -S -kernel kernel.bin
$(ODIR):
mkdir -p $@
$(ASMODIR):
mkdir -p $@
.PHONY: clean
clean:
rm -rf $(ODIR)
rm -rf $(ASMODIR)
rm -f boot.o
rm -rf isodir
rm -f $(NAME).iso
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