*add unit test makefile.

df_datalink_sp/unit_test/Makefile

@@ -0,0 +1,75 @@
+
+PMD_HOME ?= /home/gatsby/Software/pmd-bin-6.0.1
+OCLINT_HOME ?= /home/gatsby/Software/oclint-0.13.1
+
+# Source files
+DEBUG_LEVEL := 0
+COMMON_SRC := ../src/system_monitor.h ../src/system_monitor.c
+TEST_FRAME := unit_test_framework.h
+UTIL_SRC := $(wildcard ../src/util/*.c ../src/util/*.h)
+TMC_SRC := $(wildcard ../src/time_ctrl/*.c ../src/time_ctrl/*.h)
+PHY_SRC := $(wildcard ../src/networking/phy_layer/*.c ../src/networking/phy_layer/*.h)
+GEOMETRY_SRC := $(wildcard ../src/networking/link_layer/geometry/*.c ../src/networking/link_layer/geometry/*.h)
+LINK_SRC := $(wildcard ../src/networking/link_layer/*.c ../src/networking/link_layer/*.h)
+
+# Compiler
+CC ?= gcc
+
+# Compiler flags
+CFLAGS ?= --std=c11 -O0 -I../src -I../src/include -Wall -Wformat=2 -Werror -pedantic -g -Wno-sign-compare -Wno-comment
+
+# Add sanitizer flags for identifying undefined behavior.  The flags are
+# different on macOS (AKA Darwin) and Windows/WSL/Linux.
+UNAME := $(shell uname -s)
+ifeq "$(UNAME)" "Darwin"
+	CFLAGS += -fsanitize=address -fsanitize=undefined
+else
+	CFLAGS += -m32 -fsanitize=address -fsanitize=undefined -D_GLIBCC_DEBUG
+endif
+
+test: linklayer_emulate_unit_test.exe
+	./linklayer_emulate_unit_test.exe > linklayer_emulate_unit_test.log
+
+linklayer_emulate_unit_test.exe: linklayer_emulate_unit_test.c \
+                             $(LINK_SRC) \
+                             $(GEOMETRY_SRC) \
+                             $(PHY_SRC) \
+                             $(TMC_SRC) \
+                             $(UTIL_SRC) \
+                             $(COMMON_SRC) \
+                             $(TEST_FRAME) \
+                             Makefile
+	$(CC) $(CFLAGS) -lm -DEMULATION -D_DEBUG_LEVEL=$(DEBUG_LEVEL) $(filter %.c, $^) -o $@
+clean:
+	rm -f *.exe *.log
+
+# Style check
+CPD ?= $(PMD_HOME)/bin/run.sh cpd
+OCLINT ?= $(OCLINT_HOME)/bin/oclint
+FILES := $(SRCS)
+CPD_FILES := $(SRCS)
+style :
+	$(OCLINT) \
+    -no-analytics \
+    -rule=LongLine \
+    -rule=HighNcssMethod \
+    -rule=DeepNestedBlock \
+    -rule=TooManyParameters \
+    -rc=LONG_LINE=80 \
+    -rc=NCSS_METHOD=1000 \
+    -rc=NESTED_BLOCK_DEPTH=4 \
+    -rc=TOO_MANY_PARAMETERS=4 \
+    -max-priority-1 0 \
+    -max-priority-2 0 \
+    -max-priority-3 0 \
+    $(FILES) \
+    -- -xc++ --std=c99
+	$(CPD) \
+    --minimum-tokens 100 \
+    --language c \
+    --failOnViolation true \
+    --files $(CPD_FILES)
+	@echo "########################################"
+	@echo "Style checks PASS"
+
+.PHONY: clean test