CC = riscv64-unknown-elf-g++
CFLAGS = -march=rv32ec_zicsr -nostdlib -mabi=ilp32e -O0 -g -I$(BASE_DIR)/header -fno-exceptions
OBJCOPY = riscv64-unknown-elf-objcopy

BASE_DIR = ../base
BUILD_DIR = build
LD_SCRIPT ?= $(BASE_DIR)/ch32v003.ld
LDFLAGS = -T $(LD_SCRIPT)

$(shell mkdir -p $(BUILD_DIR))

.PHONY: all clean

all: $(BUILD_DIR)/$(TARGET).bin

$(BUILD_DIR)/startup.o: $(BASE_DIR)/startup.S
    $(CC) $(CFLAGS) -c -o $@ $<

$(BUILD_DIR)/$(TARGET).elf: $(BUILD_DIR)/startup.o $(SOURCES)
    $(CC) $(CFLAGS) $(LDFLAGS) $^ -o $@

$(BUILD_DIR)/$(TARGET).bin: $(BUILD_DIR)/$(TARGET).elf
    $(OBJCOPY) -O binary $< $@

clean:
    rm -rf $(BUILD_DIR)