_POSIX_SPIN_LOCKS  440 native_client_sdk/src/libraries/third_party/pthreads-win32/pthread.h #undef _POSIX_SPIN_LOCKS
_POSIX_SPIN_LOCKS  441 native_client_sdk/src/libraries/third_party/pthreads-win32/pthread.h #define _POSIX_SPIN_LOCKS 200809L