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# :set noexpandtab

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# warnings, and use C99 with GNU extensions

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CFLAGS = -Wall -std=gnu99 -g

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# preprocessor flags

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CPPFLAGS = -Isrc/

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# libraries to use

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LOADLIBES = -lpng

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# output name

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DIST_NAME = 78949E-as2

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DIST_RESOURCES = README "Learning Diary.pdf"

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lib/libpngtile.so : \

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	build/obj/lib/image.o build/obj/lib/cache.o

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SRC_PATHS = $(wildcard src/*/*.c)

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SRC_NAMES = $(patsubst src/%,%,$(SRC_PATHS))

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SRC_DIRS = $(dir $(SRC_NAMES))

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.PHONY : dirs clean depend dist

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dirs: 

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	mkdir -p bin lib run dist

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	mkdir -p $(SRC_DIRS:%=build/deps/%)

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	mkdir -p $(SRC_DIRS:%=build/obj/%)

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clean:

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	rm -f build/obj/*/*.o build/deps/*/*.d

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	rm -f bin/* lib/*.so run/*

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	rm -rf dist/*

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# .h dependencies

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depend: $(SRC_NAMES:%.c=build/deps/%.d)

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build/deps/%.d : src/%.c

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	@set -e; rm -f $@; \

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	 $(CC) -MM -MT __ $(CPPFLAGS) $< > $@.$$$$; \

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	 sed 's,__[ :]*,build/obj/$*.o $@ : ,g' < $@.$$$$ > $@; \

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	 rm -f $@.$$$$

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include $(wildcard build/deps/*/*.d)

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# build (potential) library targets with specific cflags

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# XXX: just build everything with -fPIC?

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build/obj/shared/%.o : src/shared/%.c

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	$(CC) -c -fPIC $(CPPFLAGS) $(CFLAGS) $< -o $@

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build/obj/lib/%.o : src/lib/%.c

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	$(CC) -c -fPIC $(CPPFLAGS) $(CFLAGS) $< -o $@

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# general binary objects

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build/obj/%.o : src/%.c

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	$(CC) -c $(CPPFLAGS) $(CFLAGS) $< -o $@

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# output binaries

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bin/% : build/obj/%/main.o

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	$(CC) $(LDFLAGS) $+ $(LOADLIBES) $(LDLIBS) -o $@

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# output libraries

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lib/lib%.so :

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	$(CC) -shared $(LDFLAGS) $+ $(LOADLIBES) $(LDLIBS) -o $@

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dist:

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	mkdir -p dist/$(DIST_NAME)

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	cp -rv Makefile $(DIST_RESOURCES) src/ dist/$(DIST_NAME)/

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	rm dist/$(DIST_NAME)/src/*/.*.sw[op]

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	make -C dist/$(DIST_NAME) dirs

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	tar -C dist -czvf dist/$(DIST_NAME).tar.gz $(DIST_NAME)

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	@echo "*** Output at dist/$(DIST_NAME).tar.gz"

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