Question

Current way is like this, which looks quite clumsy..

ex1_test : ex1.o ex1_test.o
    cc -o ex1_test ex1.o ex1_test.o
ex2_test : ex2.o ex2_test.o
    cc -o ex2_test ex2.o ex2_test.o
ex3_test : ex3.o ex3_test.o
    cc -o ex3_test ex3.o ex3_test.o

Is there a variable that I can use to represent the current target and reduce the duplicate?

Thanks!

Answer 1

Step 1, introduce automatic variables:

ex1_test : ex1.o ex1_test.o
    cc -o $@ $^
ex2_test : ex2.o ex2_test.o
    cc -o $@ $^
ex3_test : ex3.o ex3_test.o
    cc -o $@ $^

Step 2, realize that these rules all look the same, and replace them with a pattern rule:

ex%_test: ex%.o ex%_test.o
    cc -o $@ $^