Import Dhrystone for benchmarking

Author: shengwen-tw

Makefile

@@ -126,6 +126,7 @@ SRC += ./user/debug-link/debug_link.c
 -include ./user/shell/shell.mk
 -include ./user/tasks/tasks.mk
 -include ./user/mavlink/mavlink.mk
+-include ./user/benchmarks/benchmarks.mk
 
 OBJS := $(SRC:.c=.o)
 OBJS += ./tools/mkromfs/romfs.o

user/benchmarks/benchmarks.mk

@@ -0,0 +1,10 @@
+PROJ_ROOT := $(dir $(lastword $(MAKEFILE_LIST)))/../..
+
+CFLAGS += -DTIME
+CFLAGS += -I $(PROJ_ROOT)/benchmarks/dhrystone
+
+# Enable the feature by uncommenting the line
+
+# To execute the Dhrystone benchmarking program, type `dhrystone'
+# command to the shell
+# SRC += $(PROJ_ROOT)/user/benchmarks/dhrystone/dhrystone.c