[jialiang@ht191w tmp]$ make -f mk clean # gnu make

make:
Circular target <- clean dependency dropped.

echo “clean is called”

clean is called

echo “clean running”

clean running

echo “current dir is: ”

current dir is:

pwd

/home/jialiang/tmp

[jialiang@ht191w tmp]$ cmake -f mk clean # clearmake


clearmake: Warning: Cycle in dependency graph?


clearmake: Warning: “clean” was already seen. echo “clean is called” clean is called echo “clean running” clean running echo “current dir is: ” current dir is: pwd /home/jialiang/tmp [jialiang@ht191w tmp]$ cat mk # Marco/Variable define a = “great” # Target/Dependency define all: echo “great” .PHONY: clean clean: target echo “clean running” ifeq ($(a),great) echo “equals” endif ifneq ($(a),dd) echo “current dir is: ” pwd endif target: clean echo “clean is called” # this line is useless,unless you put it the first line when you start define target default: clean