Makefile 規則

$ make
=== test ===
$ cat Makefile 
test:
    @echo "=== test ==="
default:
    @echo "=== default ==="
deploy:
    @echo "=== deploy ==="
clean:
    @echo "=== clean ==="

#這里滿足規則1，deploy在最前面，所以make = make deploy
$ make
=== clean ===
=== deploy ===

#前置條件先跑
$ cat Makefile 
deploy:clean

test:
    @echo "=== test ==="
default:
    @echo "=== default ==="
deploy:
    @echo "=== deploy ==="
clean:
    @echo "=== clean ==="

#前置的前置都需要先行
$ make
=== test ===
=== clean ===
=== deploy ===

$ cat Makefile 

deploy:clean
clean:test

test:
    @echo "=== test ==="
default:
    @echo "=== default ==="
deploy:
    @echo "=== deploy ==="
clean:
    @echo "=== clean ==="

$ make clean
=== test ===
=== clean ===