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dirs := breakfast grains animals plants sides snacks sauces drinks
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pdfs := $(foreach dir, $(dirs), $(dir)/$(dir).pdf)
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all:
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$(foreach dir, $(dirs), $(MAKE) -C $(dir);)
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pdfjoin -o cookbook.pdf $(pdfs)
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clean:
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$(foreach dir, $(dirs), $(MAKE) -C $(dir)/ clean;)
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rm cookbook.pdf
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