SUBDIRS = Lesson1 Lesson2 Lesson3 Lesson4

all:
	for i in $(SUBDIRS); do pushd $$i && $(MAKE) all; popd; done

lesson1 : 
	cd Lesson1; make

lesson2 : 
	cd Lesson2; make

lesson3 : 
	cd Lesson3; make

lesson4 : 
	cd Lesson4; make

#empty dist and distdir to let top-level 'make' do its job
dist :

distdir :

check :

clean:
	for i in $(SUBDIRS); do pushd $$i && $(MAKE) clean; popd; done