csrc = $(wildcard src/*.c) $(wildcard src/libc/*.c)
ssrc = $(wildcard src/*.asm) $(wildcard src/libc/*.asm)
obj = $(csrc:.c=.o) $(ssrc:.asm=-asm.o)
dep = $(csrc:.c=.d)

disk_numsec = 720
#disk_numsec = 2880

bin = 86kern
img = 86kern.img

CC = ia16-elf-gcc
LD = ia16-elf-ld

warn = -pedantic -Wall
inc = -nostdinc -Isrc -Isrc/libc

CFLAGS = -march=i8088 -mtune=i8088 $(warn) $(inc) -MMD
LDFLAGS = -T kern.ld -Map kern.map

$(img): $(bin)
	dd if=/dev/zero of=$@ bs=512 count=$(disk_numsec)
	dd if=$< of=$@ bs=512 conv=notrunc

$(bin): $(obj)
	$(LD) -o $@ $(obj) $(LDFLAGS)

-include $(dep)

%-asm.o: %.asm
	nasm -o $@ -f elf $<

.PHONY: clean
clean:
	rm -f $(obj) $(bin)

.PHONY: cleandep
cleandep:
	rm -f $(dep)


.PHONY: run
run: $(img)
	qemu-system-i386 -fda $(img) -serial file:serial.log

.PHONY: debug
debug: $(img)
	qemu-system-i386 -fda $(img) -serial file:serial.log -s -S

.PHONY: disasm
disasm: $(bin)
	ndisasm -o 0x600 $< >dis