Working version

hello-world/Makefile

@@ -5,11 +5,11 @@ C_SRCS  = $(wildcard *.c)
 #CFLAGS += -O2 
 
 BOARD=freedom-e300-hifive1
-LINK_TARGET=link
+LINK_TARGET=flash
 RISCV_ARCH=rv32imac
 RISCV_ABI=ilp32
 
-LDFLAGS = -march=$(RISCV_ARCH) -mabi=$(RISCV_ABI) -mcmodel=medany
+LDFLAGS = -Wl,--wrap=printf -march=$(RISCV_ARCH) -mabi=$(RISCV_ABI) -mcmodel=medany
 
 TOOL_DIR?=/opt/riscv/FreedomStudio/20180122/SiFive/riscv64-unknown-elf-gcc-20171231-x86_64-linux-centos6/bin
 BSP_BASE = ./bsp