Wildcard targets in a Makefile

by

The concept is called pattern rules. You can read about it in GNU make manual.

$(GRAPHDIR)/%.png: $(GRAPHDIR)/%.dot
        dot $< -Tpng -o $@

graphs: $(patsubst %,$(GRAPHDIR)/%.png, Complex Simple IFileReader McCabe)\

or just

%.png: %.dot
        dot $< -Tpng -o $@

graphs: $(patsubst %,$(GRAPHDIR)/%.png, Complex Simple IFileReader McCabe)

You can also remove all repetition by extracting one of the patterns into a separate variable PNG_PATTERN like so:

PNG_pattern=$(GRAPHDIR)/%.png

$(PNG_pattern): $(GRAPHDIR)/%.dot
        dot $< -Tpng -o $@

graphs: $(patsubst %,$(PNG_pattern), Complex Simple IFileReader McCabe)

More Related Contents:

  1. What is the difference between the GNU Makefile variable assignments =, ?=, := and +=?
  2. Recursive wildcards in GNU make?
  3. Define make variable at rule execution time
  4. What do @, – and + do as prefixes to recipe lines in Make?
  5. How to place object files in separate subdirectory
  6. Getting make to create object files in a specific directory
  7. How do you get the list of targets in a makefile?
  8. Difference between CPPFLAGS and CXXFLAGS in GNU Make
  9. How to get current relative directory of your Makefile?
  10. Why .SECONDARY does not work with patterns (%) while .PRECIOUS does?
  11. Building C-program “out of source tree” with GNU make
  12. How do I write the ‘cd’ command in a makefile?
  13. How can I configure my makefile for debug and release builds?
  14. Run make in each subdirectory
  15. Suppress make rule error output
  16. How to print out a variable in makefile
  17. What does @: (at symbol colon) mean in a Makefile?
  18. Force gnu make to rebuild objects affected by compiler definition
  19. What is the purpose of .PHONY in a Makefile?
  20. OS detecting makefile
  21. How to write loop in a Makefile?
  22. Create directories using make file
  23. Is it possible to set CFLAGS to a linux kernel module Makefile?
  24. What are Makefile.am and Makefile.in?
  25. make *** no targets specified and no makefile found. stop
  26. Makefile ifeq logical or
  27. CMAKE_MAKE_PROGRAM not found
  28. Create a variable in a makefile by reading contents of another file
  29. Why are .PHONY implicit pattern rules not triggered?
  30. tar: file changed as we read it

Leave a Comment