TARGET = kernel

SRCS = $(wildcard *.c)
ASMS = $(wildcard *.s)
OBJS = $(SRCS:.c=.o) $(ASMS:.s=.o) usrbin/usrbin_blob.o

CFLAGS = -m32 -I../include -ffreestanding -nostdinc -nostdlib -fno-stack-protector -fno-pie -gstabs+
LDFLAGS = -m elf_i386 -T link.ld
ASMFLAGS = -f elf32

CC = gcc $(CFLAGS)
LD = ld $(LDFLAGS)
ASM = nasm $(ASMFLAGS)

all: build

build: $(TARGET)

usrbin/usrbin_blob.o: $(wildcard usrbin/*.s) $(wildcard usrbin/*.c)
	$(MAKE) -C usrbin

.s.o:
	$(ASM) -o $*.o $^

.c.o:
	$(CC) -c -o $*.o $^

$(TARGET): $(OBJS)
	$(LD) -o $(TARGET) $(OBJS)

clean:
	rm -f $(OBJS)
	rm -f $(TARGET)
	$(MAKE) -C usrbin clean

run: $(TARGET)
	qemu-system-x86_64 -s -kernel $(TARGET)