obj_dir/Vcpu.cpp: cpu.v test_main.cpp
verilator -Wall -cc cpu.v --exe test_main.cpp
obj_dir/Vcpu: obj_dir/Vcpu.cpp
cd obj_dir; make -j -f Vcpu.mk Vcpu
test: obj_dir/Vcpu
obj_dir/Vcpu
clean:
rm -rf obj_dir