BUILD_DIR = build

C_SOURCES = \
src/drivers/xilinx_gpio.c \
src/drivers/xilinx_uartlite.c \
src/drivers/xilinx_timer.c \
src/ibex_it.c \
src/ibex_system.c \
src/soc_peripherals.c \
src/system_init.c \
src/syscalls.c \
src/main.c

INCLUDES = \
-Iinclude

ASM_SOURCES = \
startup.s

LDSCRIPT = linker.ld

TARGET = hello

CC = /home/imi415/Softwares/Arch/RISC-V/toolchains/rv32imc/bin/riscv32-unknown-elf-gcc
AS = /home/imi415/Softwares/Arch/RISC-V/toolchains/rv32imc/bin/riscv32-unknown-elf-gcc
CP = /home/imi415/Softwares/Arch/RISC-V/toolchains/rv32imc/bin/riscv32-unknown-elf-objcopy
SZ = /home/imi415/Softwares/Arch/RISC-V/toolchains/rv32imc/bin/riscv32-unknown-elf-size

HEX = $(CP) -O ihex
BIN = $(CP) -O binary

CFLAGS += -mabi=ilp32 -march=rv32imc -g $(INCLUDES)
ASFLAGS += -mabi=ilp32 -march=rv32imc -g
LDFLAGS += -nostartfiles -specs=nosys.specs -specs=nano.specs -lc -lm -lnosys


LDFLAGS += -T$(LDSCRIPT) -Wl,-Map=$(BUILD_DIR)/$(TARGET).map -Wl,--print-memory-usage

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

OBJECTS = $(addprefix $(BUILD_DIR)/,$(notdir $(C_SOURCES:.c=.o)))
vpath %.c $(sort $(dir $(C_SOURCES)))

OBJECTS += $(addprefix $(BUILD_DIR)/,$(notdir $(ASM_SOURCES:.s=.o)))
vpath %.s $(sort $(dir $(ASM_SOURCES)))

$(BUILD_DIR)/%.o: %.c Makefile | $(BUILD_DIR)
		$(CC) -c $(CFLAGS) -Wa,-a,-ad,-alms=$(BUILD_DIR)/$(notdir $(<:.c=.lst)) $< -o $@

$(BUILD_DIR)/%.o: %.s Makefile | $(BUILD_DIR)
		$(AS) -c $(CFLAGS) $< -o $@

$(BUILD_DIR)/$(TARGET).elf: $(OBJECTS) Makefile
		$(CC) $(OBJECTS) $(LDFLAGS) -o $@
		$(SZ) $@

$(BUILD_DIR)/%.hex: $(BUILD_DIR)/%.elf | $(BUILD_DIR)
		$(HEX) $< $@
        
$(BUILD_DIR)/%.bin: $(BUILD_DIR)/%.elf | $(BUILD_DIR)
		$(BIN) $< $@    

$(BUILD_DIR):
		mkdir $@