040000 tree 5575c8fae498f5109e2e04043e0b709b0149e90b	s4-base
040000 tree 4d178b03a39c07c592e90426a483c4523516a13c	s4-comm
040000 tree 8a743394858cc0e519c2306ae39fd997fae7aa03	s4-core
040000 tree 1280293133f6a088c68792a6b587dc5d5804024b	s4-edsl
040000 tree db5c44d5b148e34c3da600db1e521db1b20576cb	s4-example
040000 tree 03715e1995b2f7049f570e63bee2dd504288f725	s4-tools