Automatic dependency handling for sources in makefile

Makefile

@@ -2,7 +2,7 @@ NAME = WalrusRPG
 
 DEBUG = FALSE
 
-CFLAGS_COMMON = -Wall -W -marm $(addprefix -I,$(INCLUDE))
+CFLAGS_COMMON = -Wall -W -marm $(addprefix -I,$(INCLUDE)) -MMD -MP
 
 ifeq ($(DEBUG),FALSE)
 	CFLAGS_COMMON += -Ofast -flto

rules.mk

@@ -4,6 +4,9 @@ all: $(EXE)
 
 include $(wildcard */rules.mk)
 
+# Object dependency files
+-include $(OBJS:%.o=%.d)
+
 $(OUT)/%.o: %.c | $(BUILT_SRCS)
 	@echo "CC: $@"
 	@mkdir -p $(dir $@)