ifndef _MK_COMMON
_MK_COMMON := # defined

TL_TARGET?=all
BOARD?=iss

.PHONY: $(TL_TARGET)
$(TL_TARGET): $(TARGET).elf

ENV_DIR:=$(dir $(lastword $(MAKEFILE_LIST)))
BSP_BASE=$(ENV_DIR)/..
PLATFORM_DIR = $(ENV_DIR)/$(BOARD)

include $(BSP_BASE)/libwrap/libwrap.mk


ASM_SRCS += $(ENV_DIR)/start.S $(ENV_DIR)/entry.S
C_SRCS   += $(PLATFORM_DIR)/init.c

LINKER_SCRIPT ?= $(PLATFORM_DIR)/$(LINK_TARGET).lds

INCLUDES += -I$(BSP_BASE)/include
INCLUDES += -I$(BSP_BASE)/drivers/
INCLUDES += -I$(ENV_DIR)
INCLUDES += -I$(PLATFORM_DIR)

LDFLAGS += -march=$(RISCV_ARCH) -mabi=$(RISCV_ABI)
LDFLAGS += -L$(ENV_DIR)
LD_SCRIPT += -T $(LINKER_SCRIPT) -Wl,--no-warn-rwx-segments -Wl,-Map=$(TARGET).map  -nostartfiles 

ifneq (,$(findstring specs=nano.specs,$(LDFLAGS), LD_SCRIPT))
    # Found
else
    # Not found
endif


ASM_OBJS := $(ASM_SRCS:.S=.o)
C_OBJS   := $(C_SRCS:.c=.o)
CXX_OBJS := $(CXX_SRCS:.cpp=.o)

LINK_OBJS += $(ASM_OBJS) $(C_OBJS) $(CXX_OBJS)
LINK_DEPS += $(LINKER_SCRIPT)

CLEAN_OBJS += $(TARGET).elf $(LINK_OBJS)

GCCVERSION = $(shell $(CC) --version | grep gcc | awk '{print($NF);}')
ifeq ($(GCCVERSION),9.2)
  CFLAGS += -march=$(RISCV_ARCH)
else
  CFLAGS += -march=$(RISCV_ARCH)_zicsr_zifencei
endif
CFLAGS += -mabi=$(RISCV_ABI)
CFLAGS += -mcmodel=medany
CFLAGS += -DBOARD_$(BOARD)

TRIPLET?=riscv64-unknown-elf
CXX=$(TOOL_DIR)$(TRIPLET)-c++
CC=$(TOOL_DIR)$(TRIPLET)-gcc
LD=$(TOOL_DIR)$(TRIPLET)-gcc
AR=$(TOOL_DIR)$(TRIPLET)-ar
OBJDUMP := $(TOOL_DIR)$(TRIPLET)-objdump
OBJCOPY := $(TOOL_DIR)$(TRIPLET)-objcopy

ifndef NO_DEFAULT_LINK
$(TARGET).elf: $(LINK_OBJS) $(LINK_DEPS)
	echo LINK_OBJS: $(LINK_OBJS)
	$(LD) $(LINK_OBJS) $(LDFLAGS) $(LIBWRAP_LDFLAGS) $(LIBWRAP) $(LD_SCRIPT) -o $@
	$(OBJDUMP) -d -S $@ > $(TARGET).dis
endif

$(ASM_OBJS): %.o: %.S $(HEADERS)
	$(CC) $(CFLAGS) $(INCLUDES) -c -o $@ $<

$(C_OBJS): %.o: %.c $(HEADERS)
	$(CC) $(CFLAGS) $(INCLUDES) -include sys/cdefs.h -c -o $@ $<

$(CXX_OBJS): %.o: %.cpp $(HEADERS)
	$(CXX) $(CFLAGS) $(CXXFLAGS) $(INCLUDES) -include sys/cdefs.h -c -o $@ $<

.PHONY: clean
clean:
	rm -f $(CLEAN_OBJS) $(LIBWRAP)

endif