rework structure

benchmarks/dhrystone/Makefile

@@ -0,0 +1,25 @@
+TARGET := dhrystone
+ISA?=imc
+
+ASM_SRCS := 
+C_SRCS := dhry_stubs.c dhry_printf.c dhry_1.c dhry_2.c
+HEADERS := dhry.h
+
+BOARD=iss
+LINK_TARGET=link
+RISCV_ARCH:=rv32$(ISA)
+ifeq ($(ISA),e)
+    RISCV_ABI:=ilp32e
+else
+    RISCV_ABI:=ilp32
+endif
+# '-lgcc -lm' are needed to add softfloat routines
+CFLAGS  := -g -march=$(RISCV_ARCH) -mabi=$(RISCV_ABI) -mcmodel=medlow -O3 -DHZ=32768 -DTIME -DNO_INIT -fno-inline -fno-builtin-printf -fno-common -Wno-implicit \
+ -funroll-loops -fpeel-loops -fgcse-sm -fgcse-las
+LDFLAGS := -g -march=$(RISCV_ARCH) -mabi=$(RISCV_ABI) -mcmodel=medlow -Wl,--wrap=scanf -Wl,--wrap=printf -Wl,--wrap=exit -lgcc -lm
+
+TOOL_DIR=$(dir $(compiler))
+
+TRIPLET=riscv32-unknown-elf
+BSP_BASE = ../../bare-metal-bsp
+include $(BSP_BASE)/env/common-gcc.mk