example1 - update makefile

examples/Makefile

@@ -1,21 +0,0 @@
-# TODO:
-# Incremental compilation impossible without redundantly specifying
-# files that will be generated in the makefile
-
-
-TARGET_XML+=interface_example1.xml
-
-.PHONY: all xml clean
-
-all: c_interface $(TARGET_XML)
-
-c_interface:
-	YML_PATH=../idl yml2proc -y ../lm-c99/ig-c99.ysl2 interface_example1.yml2
-
-xml: $(TARGET_XML)
-
-%.xml: %.yml2
-	YML_PATH=../idl yml2proc -P $< -o $@
-
-clean:
-	rm -f *.xml *.xsl *.h

examples/example1/Makefile

@@ -0,0 +1,28 @@
+YML_PATH+=:../../idl
+COMPILER=../../lm-c99/ig-c99.ysl2
+BUILD_DIR=ig-c99
+
+SRC=$(wildcard *.yml2)
+SRC_XML=$(addsuffix .xml, $(basename $(SRC)))
+
+
+.PHONY: all xml compile clean
+all: xml compile
+
+compile: $(BUILD_DIR)/*
+
+xml: $(SRC_XML)
+
+$(BUILD_DIR)/*: $(BUILD_DIR) $(SRC) $(COMPILER)
+	YML_PATH=$(YML_PATH) yml2proc -y $(COMPILER) $(SRC)
+
+$(BUILD_DIR):
+	mkdir $(BUILD_DIR)
+
+%.xml: %.yml2
+	YML_PATH=$(YML_PATH) yml2proc -P $< -o $@
+
+clean:
+	rm -rf \
+	./$(BUILD_DIR) \
+	$(SRC_XML)