-RISCV_GCC = riscv-gcc
-RISCV_GCC_OPTS = -nostdlib -nostartfiles
-RISCV_OBJDUMP = riscv-objdump --disassemble-all --section=.text --section=.data --section=.bss
-RISCV_SIM = spike
+RISCV_PREFIX=riscv64-unknown-elf-
+RISCV_GCC = $(RISCV_PREFIX)gcc
+ENTROPY = -DENTROPY=$(shell echo $$$$)
+RISCV_GCC_OPTS = $(ENTROPY) -static -mcmodel=medany -fvisibility=hidden -nostdlib -nostartfiles -Wa,-march=RVIMAFDXhwacha
+RISCV_OBJDUMP = $(RISCV_PREFIX)objdump --disassemble-all --disassemble-zeroes --section=.text --section=.text.startup --section=.text.init --section=.data
+RISCV_SIM = spike --extension=hwacha