Makefile header dependencies

.gitignore

@@ -1,4 +1,5 @@
 *.o
+*.d
 main
 test
 data

Makefile

@@ -1,11 +1,14 @@
-CXX = g++
-MAIN = main
-MAIN_OBJECTS = main.o graph.o parse.o stat.o basicstat.o connectstat.o biconnected.o eigencentrality.o closenesscentrality.o betweennesscentrality.o countstat.o makeplot.o html.o statanalyzer.o
-TEST = test
-TEST_OBJECTS = test.o graph.o parse.o diameter.o
-PYPLOT_DIR = pyplot
-CXXFLAGS = -std=c++17 -Wall -O3
-LDFLAGS =
+CXX := g++
+MAIN := main
+MAIN_OBJECTS := main.o graph.o parse.o stat.o basicstat.o connectstat.o biconnected.o eigencentrality.o closenesscentrality.o betweennesscentrality.o countstat.o makeplot.o html.o statanalyzer.o
+TEST := test
+TEST_OBJECTS := test.o graph.o parse.o diameter.o
+PYPLOT_DIR := pyplot
+CXXFLAGS := -std=c++17 -Wall -O3
+LDFLAGS :=
+MAIN_DEPS := $(MAIN_OBJECTS:.o=.d)
+TEST_DEPS := $(TEST_OBJECTS:.o=.d)
+CPPFLAGS := -MMD -MP
 
 all: $(MAIN) $(TEST) $(PYPLOT_DIR)
 
@@ -19,4 +22,7 @@ $(PYPLOT_DIR):
 	mkdir -p pyplot
 
 clean:
-	rm -rf $(MAIN) $(MAIN_OBJECTS) $(TEST) $(TEST_OBJECTS) *.html pyplot __pycache__
+	rm -rf $(MAIN) $(MAIN_OBJECTS) $(TEST) $(TEST_OBJECTS) $(MAIN_DEPS) $(TEST_DEPS) *.html pyplot __pycache__
+
+-include $(MAIN_DEPS)
+-include $(TEST_DEPS)