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# :set noexpandtab

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CFLAGS_ALL = -Wall -std=gnu99

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LDFLAGS_ALL =

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CFLAGS_DBG = -g

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CFLAGS_REL = -O2

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CFLAGS_PRF = -g -O2 -pg

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LDFLAGS_PRF = -pg

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CFLAGS_SEL = ${CFLAGS_REL}

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LDFLAGS_SEL = ${LDFLAGS_REL}

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# warnings, and use C99 with GNU extensions

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CFLAGS = ${CFLAGS_ALL} ${CFLAGS_SEL}

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LDFLAGS = ${LDFLAGS_ALL} ${LDFLAGS_SEL}

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# preprocessor flags

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CPPFLAGS = -Iinclude -Isrc/

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# libraries to use

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LOADLIBES = -lpng -lpthread

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# output name

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DIST_NAME = pngtile-${shell hg id -i}

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lib/libpngtile.so : \

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	build/obj/lib/ctx.o build/obj/lib/image.o build/obj/lib/cache.o build/obj/lib/tile.o build/obj/lib/png.o build/obj/lib/error.o \

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	build/obj/shared/util.o build/obj/shared/log.o

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lib/libpngtile.a : \

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	build/obj/lib/ctx.o build/obj/lib/image.o build/obj/lib/cache.o build/obj/lib/tile.o build/obj/lib/png.o build/obj/lib/error.o \

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	build/obj/shared/util.o build/obj/shared/log.o

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bin/pngtile : \

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	build/obj/pngtile/main.o \

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	lib/libpngtile.so build/obj/shared/log.o

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bin/pngtile-static : \

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	build/obj/pngtile/main.o \

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	lib/libpngtile.a

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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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dist-clean : clean dirs

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dirs: 

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	mkdir -p bin lib dist

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

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clean:

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

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	rm -f bin/pngtile bin/pngtile-static lib/*.so lib/*.a

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	rm -f */.*.swp */*/.*.swp

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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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# XXX: hax in -pthread

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

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	$(CC) -c -fPIC -pthread $(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/% :

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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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lib/lib%.a :

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	$(AR) rc $@ $+

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dist: $(DIST_DEPS)

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	rm -rf dist/$(DIST_NAME)

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	mkdir -p dist/$(DIST_NAME)

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

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	make -C dist/$(DIST_NAME) dist-clean

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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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