RISCV_PATH?=/opt/riscv/
RISCV_NAME = riscv64-unknown-elf
RISCV_OBJCOPY = $(RISCV_PATH)/bin/$(RISCV_NAME)-objcopy
RISCV_OBJDUMP = $(RISCV_PATH)/bin/$(RISCV_NAME)-objdump
RISCV_CLIB=$(RISCV_PATH)$(RISCV_NAME)/lib/
RISCV_CC=$(RISCV_PATH)/bin/$(RISCV_NAME)-gcc
LDSCRIPT=src/ld

MABI=ilp32
MARCH := rv32i
ifeq ($(MULDIV),yes)
	MARCH := $(MARCH)m
endif
ifeq ($(ATOMIC),yes)
	MARCH := $(MARCH)a
endif
ifeq ($(COMPRESSED),yes)
	MARCH := $(MARCH)c
endif
ifeq ($(FLOATING),yes)
	MARCH := $(MARCH)fd
endif

CFLAGS += -march=$(MARCH)  -mabi=$(MABI)
LDFLAGS += -march=$(MARCH)  -mabi=$(MABI)



SRCS = 	$(wildcard src/*.c) \
        $(wildcard src/*.cpp)  \
        $(wildcard src/*.S)


CFLAGS += -static
LDFLAGS += -e_start -T $(LDSCRIPT) -nostartfiles  -Wl,-Map,$(OBJDIR)/$(PROJ_NAME).map -Wl,--print-memory-usage
OBJDIR = build
OBJS := $(SRCS)
OBJS := $(OBJS:.c=.o)
OBJS := $(OBJS:.cpp=.o)
OBJS := $(OBJS:.S=.o)
OBJS := $(addprefix $(OBJDIR)/,$(OBJS))



all: $(OBJDIR)/$(PROJ_NAME).elf $(OBJDIR)/$(PROJ_NAME).hex $(OBJDIR)/$(PROJ_NAME).asm $(OBJDIR)/$(PROJ_NAME).bin
	@echo "done"

$(OBJDIR)/%.elf: $(OBJS) | $(OBJDIR)
	$(RISCV_CC) $(CFLAGS) -o $@ $^ $(LDFLAGS) $(LIBS)

%.hex: %.elf
	$(RISCV_OBJCOPY) -O ihex $^ $@

%.bin: %.elf
	$(RISCV_OBJCOPY) -O binary $^ $@

%.v: %.elf
	$(RISCV_OBJCOPY) -O verilog $^ $@

%.asm: %.elf
	$(RISCV_OBJDUMP) -S -d $^ > $@

$(OBJDIR)/%.o: %.c
	mkdir -p $(dir $@)
	$(RISCV_CC) -c $(CFLAGS)  $(INC) -o $@ $^

$(OBJDIR)/%.o: %.cpp
	mkdir -p $(dir $@)
	$(RISCV_CC) -c $(CFLAGS)  $(INC) -o $@ $^

$(OBJDIR)/%.o: %.S
	mkdir -p $(dir $@)
	$(RISCV_CC) -c $(CFLAGS) -o $@ $^ -D__ASSEMBLY__=1

$(OBJDIR):
	mkdir -p $@

clean:
	rm -f $(OBJDIR)/$(PROJ_NAME).elf
	rm -f $(OBJDIR)/$(PROJ_NAME).hex
	rm -f $(OBJDIR)/$(PROJ_NAME).map
	rm -f $(OBJDIR)/$(PROJ_NAME).v
	rm -f $(OBJDIR)/$(PROJ_NAME).asm
	find $(OBJDIR) -type f -name '*.o' -print0 | xargs -0 -r rm

.SECONDARY: $(OBJS)