040000 tree 90d030536cb0e667531101ada71cb30941644ace	dynamic_thread
040000 tree 469f5ea81c97942238b05eae271bc71228011291	no-multithreading
040000 tree 1e882da98bca6f099afea0e299e9c8f3a598760d	thread_apis
040000 tree 5de36c3816b114bd92b8d5f8c75a9af7b44ed377	thread_init