Let's keep the Makefile as simple as possible.

src/Makefile

@@ -1,15 +1,15 @@
 #CC=g++-4.2
-
+#
-chess.out: functions.o
+#chess.out: functions.o
-	g++ chess.o functions.o -std=c++11
+#	g++ chess.o functions.o -std=c++11
-
+#
-chess.o: chess.cpp
+#chess.o: chess.cpp
-	g++ -c -std=c++11 chess.cpp
+#	g++ -c -std=c++11 chess.cpp
-
+#
-functions.o: functions.cpp functions.h
+#functions.o: functions.cpp functions.h
-	g++ -c -std=c++11 functions.cpp
+#	g++ -c -std=c++11 functions.cpp
-
+#
 default: build
 
-#build:
+build:
-#	g++ -o chess.out chess.cpp -std=c++11
+	g++ -o chess.out functions.cpp chess.cpp -std=c++11