--- Libc/Libc-825.26/pthreads/pthread.h
+++ Libc/Libc-583/pthreads/pthread.h
@@ -144,7 +144,6 @@
  */
 
 #include <sys/cdefs.h>
-#include <Availability.h>
 
 __BEGIN_DECLS
 /*
@@ -222,11 +221,6 @@
  */
 
 #define PTHREAD_MUTEX_INITIALIZER {_PTHREAD_MUTEX_SIG_init, {0}}
-
-#if (!defined(_POSIX_C_SOURCE) && !defined(_XOPEN_SOURCE)) || defined(_DARWIN_C_SOURCE)
-#define PTHREAD_ERRORCHECK_MUTEX_INITIALIZER {_PTHREAD_ERRORCHECK_MUTEX_SIG_init, {0}}
-#define PTHREAD_RECURSIVE_MUTEX_INITIALIZER {_PTHREAD_RECURSIVE_MUTEX_SIG_init, {0}}
-#endif /* (!_POSIX_C_SOURCE && !_XOPEN_SOURCE) || _DARWIN_C_SOURCE */
 
 /*
  * Condition variable attributes
@@ -478,20 +472,13 @@
 /* returns non-zero if pthread_create or cthread_fork have been called */
 int		pthread_is_threaded_np(void);
 
-int pthread_threadid_np(pthread_t,__uint64_t*) __OSX_AVAILABLE_STARTING(__MAC_10_6, __IPHONE_3_2);
-
-int pthread_rwlock_longrdlock_np(pthread_rwlock_t *) __OSX_AVAILABLE_STARTING(__MAC_10_7, __IPHONE_NA);
-int pthread_rwlock_yieldwrlock_np(pthread_rwlock_t *) __OSX_AVAILABLE_STARTING(__MAC_10_7, __IPHONE_NA);
-int pthread_rwlock_downgrade_np(pthread_rwlock_t *);
-int pthread_rwlock_upgrade_np(pthread_rwlock_t *);
-int pthread_rwlock_tryupgrade_np(pthread_rwlock_t *);
-int pthread_rwlock_held_np(pthread_rwlock_t *);
-int pthread_rwlock_rdheld_np(pthread_rwlock_t *);
-int pthread_rwlock_wrheld_np(pthread_rwlock_t *);
+#if defined(__i386__) || defined(__x86_64__)
+int		pthread_threadid_np(pthread_t,__uint64_t*);
+#endif
 
 /*SPI to set and get pthread name*/
-int		pthread_getname_np(pthread_t,char*,size_t) __OSX_AVAILABLE_STARTING(__MAC_10_6, __IPHONE_3_2);
-int		pthread_setname_np(const char*) __OSX_AVAILABLE_STARTING(__MAC_10_6, __IPHONE_3_2);
+int		pthread_getname_np(pthread_t,char*,size_t);
+int		pthread_setname_np(const char*);
 /* returns non-zero if the current thread is the main thread */
 int		pthread_main_np(void);
 
@@ -515,7 +502,7 @@
                          void *);
 int       pthread_kill(pthread_t, int);
 
-pthread_t pthread_from_mach_thread_np(mach_port_t) __OSX_AVAILABLE_STARTING(__MAC_10_5, __IPHONE_2_0);
+pthread_t pthread_from_mach_thread_np(mach_port_t);
 
 //Begin-Libc
 #ifndef LIBC_ALIAS_PTHREAD_SIGMASK