CC = arm-none-eabi-gcc
AS = arm-none-eabi-as
LD = arm-none-eabi-ld
CPU = -mcpu=cortex-m4
THUMB = -mthumb

LDFLAGS = -T linker.ld
CFLAGS = $(CPU) $(THUMB) -I libc/

QEMU = qemu-system-arm
BOARD = netduino2

# Output file
TARGET = main.elf
# Source files
SRCS = os/main.c os/process.c os/scheduler.c os/alloc.c libc/library.c tasks/tasks.c
# Object files
OBJS = $(SRCS:.c=.o)

debug: CFLAGS += -g
debug: all

run: debug
	$(QEMU) -M $(BOARD) -nographic -kernel $(TARGET)

gdb: debug
	$(QEMU) -M $(BOARD) -nographic -kernel $(TARGET) -s -S

# Default target to build the ELF file
all: $(TARGET)

$(TARGET): $(OBJS) startup.o
	$(LD) $(LDFLAGS) startup.o $(OBJS) -o $(TARGET)

startup.o: startup.s
	$(AS) $(CPU) -g startup.s -o startup.o

# Rule to compile source files into object files
%.o: %.c
	$(CC) $(CFLAGS) -c $< -o $@

clean:
	rm -f *.elf *.o *.i
	rm -f os/*.o tasks/*.o