+To compile the bootloaders for both Freedom E300 Arty and U500 VC707
+FPGA dev kits, the RISC-V software toolchain must be installed locally and
+set the $(RISCV) environment variable to point to the location of where the
+RISC-V toolchains are installed. You can build the toolchain from scratch
+or download the tools here: https://www.sifive.com/products/tools/
+
+
+Freedom E300 Arty FPGA Dev Kit