--- Libc/Libc-763.13/sys/__libc_init.c
+++ Libc/Libc-997.90.3/sys/__libc_init.c
@@ -24,53 +24,40 @@
  * __libc_init() is called from libSystem_initializer()
  */
 
+#include <limits.h>
 #include <stdint.h>
-#include <pthread.h>
-#include <pthread_machdep.h>
+#include <string.h>
+#include <machine/cpu_capabilities.h>
+#include <TargetConditionals.h>
 
+#if TARGET_IPHONE_SIMULATOR
+extern void __chk_init(void);
+extern void __xlocale_init(void);
+
+void
+_libc_sim_init(void) {
+	__chk_init();
+	__xlocale_init();
+}
+
+#else /* TARGET_IPHONE_SIMULATOR */
 struct ProgramVars; /* forward reference */
 
 extern void _program_vars_init(const struct ProgramVars *vars);
 extern void _libc_fork_init(void (*prepare)(void), void (*parent)(void), void (*child)(void));
-extern void _init_clock_port();
-extern pthread_lock_t _malloc_lock;
+extern void _init_clock_port(void);
+extern void __chk_init(void);
 extern void __xlocale_init(void);
 extern void __guard_setup(const char *apple[]);
-extern void __malloc_entropy_setup(const char *apple[]);
-extern int usenew_impl;
-
-#ifdef PR_5243343
-/* 5243343 - temporary hack to detect if we are running the conformance test */
-#include <stdlib.h>
-__private_extern__ int PR_5243343_flag = 0;
-#endif /* PR_5243343 */
-__private_extern__ int __pthread_lock_debug = 0;
-__private_extern__ int __pthread_lock_old = 0;
 
 void
 __libc_init(const struct ProgramVars *vars, void (*atfork_prepare)(void), void (*atfork_parent)(void), void (*atfork_child)(void), const char *apple[])
 {
 	_program_vars_init(vars);
 	_libc_fork_init(atfork_prepare, atfork_parent, atfork_child);
-	LOCK_INIT(_malloc_lock);
 	_init_clock_port();
+	__chk_init();
 	__xlocale_init();
 	__guard_setup(apple);
-	__malloc_entropy_setup(apple);
-
-
-#ifdef PR_5243343
-	/* 5243343 - temporary hack to detect if we are running the conformance test */
-	if(getenv("TET_EXECUTE"))
-		PR_5243343_flag = 1;
-#endif /* PR_5243343 */
-#if defined(__i386__) || defined(__x86_64__)
-        if(getenv("__PTHREAD_LOCK_DEBUG__"))
-                __pthread_lock_debug = 1;
-        if(getenv("__PTHREAD_LOCK_OLD__")) {
-                __pthread_lock_old = 1;
-                usenew_impl = 0;
-        }
-#endif
-
 }
+#endif /* TARGET_IPHONE_SIMULATOR */