adds bsp as submodule

fw/hello-world/Makefile

@@ -1,17 +1,28 @@
 
 TARGET  = hello
+ISA?=imc
+
 C_SRCS  = $(wildcard *.c) 
 HEADERS = $(wildcard *.h)
-CFLAGS += -O0 -g 
+OPT ?= -O2
+CFLAGS += $(OPT) -g 
 
-BOARD=tgfs-vp
-LINK_TARGET=flash
-RISCV_ARCH:=rv32i
-RISCV_ABI:=ilp32
-LDFLAGS := -march=$(RISCV_ARCH) -mabi=$(RISCV_ABI)
+BOARD=tgc_vp
+LINK_TARGET=link
+RISCV_ARCH:=rv32$(ISA)
+ifeq ($(ISA),e)
+    RISCV_ABI:=ilp32e
+else
+    RISCV_ABI:=ilp32
+endif
+LDFLAGS += -g -Wl,--wrap=printf
 
-compiler := $(shell which riscv32-unknown-elf-gcc)
+compiler := $(shell which riscv64-unknown-elf-gcc)
 TOOL_DIR=$(dir $(compiler))
 
+TRIPLET=riscv64-unknown-elf
 BSP_BASE = ../bsp
 include $(BSP_BASE)/env/common-gcc.mk
+
+$(TARGET).vlog:$(TARGET)
+	riscv32-unknown-elf-objcopy -O verilog $(TARGET) $(TARGET).vlog