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makefile-autovariables.md

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Makefile Automatic Variables

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  • DEPS: This is used to specify a dependency list; ie headers
  • $@: Tells to take the name of the file to the left of :
  • $^: Takes the content from the right of the :
  • $<: Takes the first item of dependency list
  • $(@D): Directory the target should go into
  • $?: List of all dependencies that are newer than the target

Example

out/test: test.c
  mkdir $(@D)
  $(CXX) -o $@ $^

References