+hidden void __tl_lock(void);
+hidden void __tl_unlock(void);
+hidden void __tl_sync(pthread_t);
+
+extern hidden volatile int __thread_list_lock;
+
+extern hidden unsigned __default_stacksize;
+extern hidden unsigned __default_guardsize;
+
+#define DEFAULT_STACK_SIZE 131072
+#define DEFAULT_GUARD_SIZE 8192