.SUFFIXES:

GCC_FLAGS := -g -O0 -Wall



all: it2-out



# it0-out.py => Hand made



it1-out0.py: it0-out.py it1-in.lang0
	cat it1-in.lang0 | python3 it0-out.py > it1-out0.py

it1-out1.py: it1-out0.py it1-in.lang0
	cat it1-in.lang0 | python3 it1-out0.py > it1-out1.py
# We can diff here since the target hasn't changed
# The target for it0 is the same as for it1
	diff it1-out0.py it1-out1.py

it1-out2.py: it1-out1.py it1-in.lang0
	cat it1-in.lang0 | python3 it1-out1.py > it1-out2.py
	diff it1-out1.py it1-out2.py

it1-out3.py: it1-out2.py it1-in.lang0
	cat it1-in.lang0 | python3 it1-out2.py > it1-out3.py
	diff it1-out2.py it1-out3.py

it1-out.py: it1-out3.py
	cp it1-out3.py it1-out.py



it2-out0.py: it1-out.py it2-in.lang0
	cat it2-in.lang0 | python3 it1-out.py > it2-out0.py

# No gcc step since the target is still python here

it2-out1.c: it2-out0.py it2-in.lang0
	cat it2-in.lang0 | python3 it2-out0.py > $@
# 	diff it2-out0.py it2-out1.py Do not diff - the target changed so the output will be different

it2-out1: it2-out1.c
	gcc $^ -o $@ $(GCC_FLAGS)

it2-out2.c: it2-out1 it2-in.lang0
	cat it2-in.lang0 | ./it2-out1 > $@
	diff it2-out1.c $@

it2-out2: it2-out2.c
	gcc $^ -o $@ $(GCC_FLAGS)

it2-out3.c: it2-out2 it2-in.lang0
	cat it2-in.lang0 | ./it2-out2 > it2-out3.c
	diff it2-out2.c it2-out3.c

it2-out3: it2-out3.c
	gcc $^ -o $@ $(GCC_FLAGS)

it2-out: it2-out3
	cp it2-out3 it2-out



it3-out0.c: it2-out it3-in.lang0
	cat it3-in.lang0 | ./it2-out > it3-out0.c

# gcc step since the target is still python here
it3-out0: it3-out0.c
	gcc $^ -o $@ $(GCC_FLAGS)

it3-out1.ll: it3-out0 it3-in.lang0
	cat it3-in.lang0 | ./it3-out0 > $@

it3-out1.s: it3-out1.ll
	llc $^ -o $@



foo.ll: foo.c
	clang -S -emit-llvm $^

foo.s: foo.ll
	llc $^

foo: foo.s
	clang $^ -o $@

clean:
	-rm it1-out* it2-out*