######################################################################
#	makefile ģ�� (by lichuang)
#
######################################################################

###################��Ŀ·���ͳ�������#################################
DIR=$(shell pwd)
BIN_DIR=$(DIR)/bin
LIB_DIR=$(DIR)/lib
SRC_DIR=$(DIR)/src
INCLUDE_DIR=$(DIR)/include
OBJ_DIR=$(DIR)/obj
DEPS_DIR=$(DIR)/deps
DUMP_OBJ=$(BIN_DIR)/rv.dump
PROGRAM=$(BIN_DIR)/rv.elf
TAR_BIN=$(BIN_DIR)/rv.bin

###################obj文件############################################
EXTENSION=c
AMS := $(patsubst $(SRC_DIR)/%.s, $(OBJ_DIR)/%.o,$(wildcard $(SRC_DIR)/*.s))
OBJS:=$(patsubst $(SRC_DIR)/%.$(EXTENSION), $(OBJ_DIR)/%.o,$(wildcard $(SRC_DIR)/*.$(EXTENSION)))
OBJS+=$(AMS)
DEPS:=$(patsubst $(OBJ_DIR)/%.o, $(DEPS_DIR)/%.d, $(OBJS))
CODE :=
CODE +=$(wildcard $(SRC_DIR)/*.s)
CODE +=$(wildcard $(SRC_DIR)/*.c)
$(info $(DEPS))


###################includeͷ�ļ�·��##################################
INCLUDE=\
		-I$(INCLUDE_DIR)
		
###################lib�ļ���·��######################################

###################����ѡ�������###################################

COMPLIE:=riscv64-unknown-elf-
CC :=$(COMPLIE)gcc 
DUMP:=$(COMPLIE)objdump
CFLAGS=-Wall -W -g 
OBJCP:=$(COMPLIE)objcopy

ARCH_BASE = rv32imc
ABI_BASE = ilp32
RISCV_MARCH = $(ARCH_BASE)
ABI =$(ABI_BASE)

RISCV_MARCH := $(RISCV_MARCH)

ARCH_FLAGS = -march=$(RISCV_MARCH) -mabi=$(ABI) -mcmodel=medlow

CFLAGS +=$(ARCH_FLAGS)
CFLAGS += -Wmaybe-uninitialized -ffunction-sections -fdata-sections -fno-exceptions \
-fno-builtin-printf -Wl,--wrap=_sbrk -Wno-unused-function -Wno-unused-parameter -Wno-format
 
LDFLAGS += -nostartfiles --specs=nano.specs


LINK_SCRIPT:=$(DIR)/ld/link_flash_bs1.lds
#LINK_SCRIPT:=$(DIR)/link_sram_bs1.lds
LDFLAGS +=$(ARCH_FLAGS)
LDFLAGS += -Wl,-T $(LINK_SCRIPT)
LDFLAGS += -Wl,--gc-sections 
LDFLAGS += -Wl,--no-relax


# CFLAGS += -march=rv32imac -mabi=ilp32 -mcmodel=medlow -ffunction-sections -fdata-sections 
          


###################����Ŀ��###########################################
.PHONY: all clean rebuild

all:$(OBJS) 
	@echo $(DEPS_DIR)
	$(CC) -o $(PROGRAM) $(OBJS) $(LDFLAGS)  $(CFLAGS)
	$(DUMP) -D -S $(PROGRAM) > $(DUMP_OBJ) 2>&1
	$(OBJCP) $(PROGRAM) -O binary $(TAR_BIN)

$(DEPS_DIR)/%.d: $(SRC_DIR)/%.$(EXTENSION)
	$(CC) -MM $(INCLUDE) $(CFLAGS) $< | sed -e 1's,^,$(OBJ_DIR)/,' > $@

sinclude $(DEPS)

$(OBJ_DIR)/%.o: $(SRC_DIR)/%.s
	$(CC) $< -o $@ -c $(CFLAGS) $(INCLUDE) 

$(OBJ_DIR)/%.o: $(SRC_DIR)/%.c
	$(CC) $< -o $@ -c $(CFLAGS) $(INCLUDE) 
rebuild: clean all

clean:
	rm -rf $(OBJS) $(BIN_DIR)/* $(OBJ_DIR)/* $(DEPS_DIR)/*