csrc = $(wildcard src/*.c) $(wildcard src/libc/*.c)
asmsrc = $(wildcard src/*.asm) $(wildcard src/libc/*.asm)
obj = $(csrc:.c=.o) $(asmsrc:.asm=-asm.o)
dep = $(csrc:.c=.d)
elf = kern1.elf

warn = -pedantic -Wall
dbg = -g
inc = -Isrc -Isrc/libc

CFLAGS = $(carch) -march=i386 $(warn) $(dbg) $(inc) -fno-pic -ffreestanding -nostdinc \
		 -fno-builtin -MMD
LDFLAGS = $(ldarch) -nostdlib -T kern1.ld -Map kern1.map

ifeq ($(shell uname -m), x86_64)
	carch = -m32
	ldarch = -m elf_i386
endif

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

-include $(dep)

%-asm.o: %.asm
	nasm -f elf32 -o $@ $<

.PHONY: clean
clean:
	rm -f $(obj) $(elf) link.map

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

.PHONY: run
run: $(elf)
	qemu-system-i386 -kernel $(elf) -serial file:serial.log

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