040000 tree 22f369f7803e22466431bf3f992eadf89b482e2c	dynamic_thread
040000 tree b4fdd2517abfb2f3592c20fbf10304eef47c768d	no-multithreading
040000 tree 4048e423f0a04b977120b47a96ec674971a4364f	thread_apis
040000 tree 8e39f064f638a731c5ae68545cfaf63cee2b3490	thread_init