added SUBDIRS to top-level Makefile to make adding subdirectories easier

git-svn-id: svn://anubis/fart/trunk@214 7f9b0f55-74a9-4bce-be96-3c2cd072584d

Makefile

@@ -9,19 +9,23 @@ export CXXFLAGS := -Wall -O2
 
 LDFLAGS := -lfl
 
+SUBDIRS := util shapes main parser
+
 all: $(TARGET)
 
 .PHONY: $(TARGET)
 $(TARGET):
-	make -C util
-	make -C shapes
-	make -C main
-	make -C parser
-	$(CXX) -o $@ main/*.o util/*.o shapes/*.o parser/*.o $(CXXFLAGS) $(LDFLAGS)
+	@for d in $(SUBDIRS); \
+		do $(MAKE) -C $$d; \
+		ret=$$?; \
+		if [[ $$ret != 0 ]]; then \
+			exit $$ret; \
+		fi; \
+	done
+	$(CXX) -o $@ $(patsubst %,%/*.o,$(SUBDIRS)) $(CXXFLAGS) $(LDFLAGS)
 
 clean:
-	make -C parser clean CLEAN=1
-	make -C main clean CLEAN=1
-	make -C shapes clean CLEAN=1
-	make -C util clean CLEAN=1
+	@for d in $(SUBDIRS); \
+		do $(MAKE) -C $$d clean CLEAN=1; \
+	done
 	-rm -f $(TARGET)

main/Makefile

@@ -18,6 +18,6 @@ clean:
 	-$(RM) -f *.o *.dep
 
 # Include dependency files
-ifndef clean
+ifndef CLEAN
 -include $(DEPS)
 endif