Create Release and Debug directories if they are not present.

Otherwise, build fails if these directories do not exist.

projects/effects/Makefile.in

@@ -38,14 +38,18 @@ ifeq ($(strip $(RAWWAVES)), )
 endif
 DEFS    += -DRAWWAVE_PATH=\"$(RAWWAVES)\"
 
-%.o : $(SRC_PATH)/%.cpp
+%.o : $(SRC_PATH)/%.cpp $(OBJECT_PATH)/.placeholder
 	$(CC) $(CFLAGS) $(DEFS) -c $(<) -o $(OBJECT_PATH)/$@
 
-%.o : ../../src/include/%.cpp
+%.o : ../../src/include/%.cpp $(OBJECT_PATH)/.placeholder
 	$(CC) $(CFLAGS) $(DEFS) -c $(<) -o $(OBJECT_PATH)/$@
 
 all : $(PROGRAMS)
 
+$(OBJECT_PATH)/.placeholder:
+	mkdir -vp $(OBJECT_PATH)
+	touch $(OBJECT_PATH)/.placeholder
+
 effects: effects.cpp $(OBJECTS)
 	$(CC) $(LDFLAGS) $(CFLAGS) $(DEFS) -o effects effects.cpp $(OBJECT_PATH)/*.o $(LIBRARY)