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# makefile for generating a stable set of bridgesupport files that change timestamp
# only when the bridgesupport data actually changes

FRAMEWORKS_DIR = /System/Library/Frameworks
GBM = /usr/bin/gen_bridge_metadata
GEN_HEADERS = $(addsuffix .headers,$(FRAMEWORKS))
GEN_BRIDGESUPPORT = $(addsuffix .bridgesupport,$(FRAMEWORKS))

%.bridgesupport : %.headers $(FRAMEWORKS_DIR)/%.framework/Headers/*.h
	@echo "generating bridge support for" $<
	if [ -f $(FRAMEWORKS_DIR)/$(<:.headers=.framework)/Resources/BridgeSupport/$(<:.headers=Full.bridgesupport) ] ; \
	  then cp $(FRAMEWORKS_DIR)/$(<:.headers=.framework)/Resources/BridgeSupport/$(<:.headers=Full.bridgesupport) $@ ; \
	  else $(GBM) -F complete --framework $(<:.headers=.framework) -o $@ ; \
	fi
	if cmp -s $@ $(STABLE_GEN_DIR)/$(@:.bridgesupport=Full.bridgesupport) ; \
	  then : ; \
	  else cp $@ $(STABLE_GEN_DIR)/$(@:.bridgesupport=Full.bridgesupport) ; \
	fi

%.headers : $(FRAMEWORKS_DIR)/%.framework/Headers
	@echo linking $<
	ln -s $< $@

$(STABLE_GEN_DIR):
	mkdir -p $(STABLE_GEN_DIR)

$(GEN_BRIDGESUPPORT): $(GEN_HEADERS) $(STABLE_GEN_DIR)

all: $(GEN_BRIDGESUPPORT)