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AS = i686-elf-as
CC = i686-elf-gcc
CFLAGS = -std=gnu99 -ffreestanding -O2 -Wall -Wextra
CFLAGS += -mgeneral-regs-only
CFLAGS += -Isrc/
LFLAGS = -ffreestanding -O2 -nostdlib -lgcc
QFLAGS = -no-reboot -d guest_errors,int,pcall,cpu_reset
OBJ = $(patsubst src/%.s,out/obj/%.s.o,$(shell find src/ -type f -name '*.s'))
OBJ += $(patsubst src/%.c,out/obj/%.c.o,$(shell find src/ -type f -name '*.c'))
out/boot.iso: out/fs/boot/kernel.bin out/fs/boot/grub/grub.cfg
grub-mkrescue -o $@ out/fs/
out/fs/boot/grub/grub.cfg: grub.cfg
@mkdir -p $(@D)
cp $< $@
out/fs/boot/kernel.bin: $(OBJ)
@mkdir -p $(@D)
$(CC) $(LFLAGS) -T linker.ld $^ -o $@
grub-file --is-x86-multiboot $@
out/obj/%.s.o: src/%.s
@mkdir -p $(@D)
$(AS) $^ -o $@
out/obj/%.c.o: src/%.c
@mkdir -p $(@D)
$(CC) $(CFLAGS) -c $^ -o $@
.PHONY: boot debug clean
boot: out/fs/boot/kernel.bin
qemu-system-i386 -kernel $< $(QFLAGS) -no-shutdown
debug: kernel.bin
qemu-system-i386 -kernel $< $(QFLAGS) -s -S &
sleep 1
gdb
clean:
rm -rv out/
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