040000 tree 90d030536cb0e667531101ada71cb30941644ace	dynamic_thread
040000 tree 7337f92149fda1a5314f87bcb2fb6b41bdf2fb2a	no-multithreading
040000 tree b4dbcdd111807d93454c071ed8d4893e2b5d719a	thread_apis
040000 tree 00662c68f4f8e5725af18dc021a695dc73b31e0c	thread_init