CXXFLAGS=-Wall -Werror -std=gnu++17 -fno-operator-names -ggdb -O0
LINK.o=$(LINK.cc)

all: level0 level1 habit-starts/rhythm
level0: level0.o liblevel0.a
liblevel0.a: $(patsubst %.cpp,%.o,$(wildcard level-0/*.cpp))
level1: level1.o liblevel1.a
liblevel1.a: $(patsubst %.cpp,%.o,$(wildcard level-0/*.cpp)) $(patsubst %.cpp,%.o,$(wildcard level-1/*.cpp))
level2: liblevel2.a
liblevel2.a: $(patsubst %.cpp,%.o,$(wildcard level-0/*.cpp)) $(patsubst %.cpp,%.o,$(wildcard level-1/*.cpp)) $(patsubst %.cpp,%.o,$(wildcard level-2/*.cpp))

habit-starts/rhythm: habit-starts/rhythm.o liblevel2.a

%.o: %.ii
	$(CXX) $(CXXFLAGS) -c $^ -o $@
%.ii: %.cpp
	$(CXX) $(CPPFLAGS) $(CXXFLAGS) -E $^ -o $@
.INTERMEDIATE: $(patsubst %.cpp,%.ii,$(wildcard */*.cpp *.cpp))

liblevel%.a: level-%/*.hpp
%.a:
	ar ru $@ $^
	ranlib $@

clean:
	-rm *.ii *.o level? *.a */*.o */*.ii