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diff --git a/libc/sysdeps/linux/arm/bits/libc-lock.h b/libc/sysdeps/linux/arm/bits/libc-lock.h
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+/* libc-internal interface for mutex locks. LinuxThreads version.
+ Copyright (C) 1996,1997,1998,1999,2000,2001 Free Software Foundation, Inc.
+ This file is part of the GNU C Library.
+
+ The GNU C Library is free software; you can redistribute it and/or
+ modify it under the terms of the GNU Library General Public License as
+ published by the Free Software Foundation; either version 2 of the
+ License, or (at your option) any later version.
+
+ The GNU C Library is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ Library General Public License for more details.
+
+ You should have received a copy of the GNU Library General Public
+ License along with the GNU C Library; see the file COPYING.LIB. If not,
+ write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+ Boston, MA 02111-1307, USA. */
+
+#ifndef _BITS_LIBC_LOCK_H
+#define _BITS_LIBC_LOCK_H 1
+
+#include <pthread.h>
+
+/* Mutex type. */
+#ifdef _LIBC
+typedef pthread_mutex_t __libc_lock_t;
+typedef pthread_rwlock_t __libc_rwlock_t;
+#else
+typedef struct __libc_lock_opaque__ __libc_lock_t;
+typedef struct __libc_rwlock_opaque__ __libc_rwlock_t;
+#endif
+
+/* Type for key to thread-specific data. */
+typedef pthread_key_t __libc_key_t;
+
+/* Define a lock variable NAME with storage class CLASS. The lock must be
+ initialized with __libc_lock_init before it can be used (or define it
+ with __libc_lock_define_initialized, below). Use `extern' for CLASS to
+ declare a lock defined in another module. In public structure
+ definitions you must use a pointer to the lock structure (i.e., NAME
+ begins with a `*'), because its storage size will not be known outside
+ of libc. */
+#define __libc_lock_define(CLASS,NAME) \
+ CLASS __libc_lock_t NAME;
+#define __libc_rwlock_define(CLASS,NAME) \
+ CLASS __libc_rwlock_t NAME;
+
+/* Define an initialized lock variable NAME with storage class CLASS.
+
+ For the C library we take a deeper look at the initializer. For
+ this implementation all fields are initialized to zero. Therefore
+ we don't initialize the variable which allows putting it into the
+ BSS section. (Except on PA-RISC and other odd architectures, where
+ initialized locks must be set to one due to the lack of normal
+ atomic operations.) */
+
+#if __LT_SPINLOCK_INIT == 0
+# define __libc_lock_define_initialized(CLASS,NAME) \
+ CLASS __libc_lock_t NAME;
+#else
+# define __libc_lock_define_initialized(CLASS,NAME) \
+ CLASS __libc_lock_t NAME = PTHREAD_MUTEX_INITIALIZER;
+#endif
+
+#define __libc_rwlock_define_initialized(CLASS,NAME) \
+ CLASS __libc_rwlock_t NAME = PTHREAD_RWLOCK_INITIALIZER;
+
+/* Define an initialized recursive lock variable NAME with storage
+ class CLASS. */
+#define __libc_lock_define_initialized_recursive(CLASS,NAME) \
+ CLASS __libc_lock_t NAME = PTHREAD_RECURSIVE_MUTEX_INITIALIZER_NP;
+
+/* Initialize the named lock variable, leaving it in a consistent, unlocked
+ state. */
+#define __libc_lock_init(NAME) \
+ (__pthread_mutex_init != NULL ? __pthread_mutex_init (&(NAME), NULL) : 0);
+#define __libc_rwlock_init(NAME) \
+ (__pthread_rwlock_init != NULL ? __pthread_rwlock_init (&(NAME), NULL) : 0);
+
+/* Same as last but this time we initialize a recursive mutex. */
+#define __libc_lock_init_recursive(NAME) \
+ do { \
+ if (__pthread_mutex_init != NULL) \
+ { \
+ pthread_mutexattr_t __attr; \
+ __pthread_mutexattr_init (&__attr); \
+ __pthread_mutexattr_settype (&__attr, PTHREAD_MUTEX_RECURSIVE_NP); \
+ __pthread_mutex_init (&(NAME), &__attr); \
+ __pthread_mutexattr_destroy (&__attr); \
+ } \
+ } while (0);
+
+/* Finalize the named lock variable, which must be locked. It cannot be
+ used again until __libc_lock_init is called again on it. This must be
+ called on a lock variable before the containing storage is reused. */
+#define __libc_lock_fini(NAME) \
+ (__pthread_mutex_destroy != NULL ? __pthread_mutex_destroy (&(NAME)) : 0);
+#define __libc_rwlock_fini(NAME) \
+ (__pthread_rwlock_destroy != NULL ? __pthread_rwlock_destroy (&(NAME)) : 0);
+
+/* Finalize recursive named lock. */
+#define __libc_lock_fini_recursive(NAME) __libc_lock_fini (NAME)
+
+/* Lock the named lock variable. */
+#define __libc_lock_lock(NAME) \
+ (__pthread_mutex_lock != NULL ? __pthread_mutex_lock (&(NAME)) : 0);
+#define __libc_rwlock_rdlock(NAME) \
+ (__pthread_rwlock_rdlock != NULL ? __pthread_rwlock_rdlock (&(NAME)) : 0);
+#define __libc_rwlock_wrlock(NAME) \
+ (__pthread_rwlock_wrlock != NULL ? __pthread_rwlock_wrlock (&(NAME)) : 0);
+
+/* Lock the recursive named lock variable. */
+#define __libc_lock_lock_recursive(NAME) __libc_lock_lock (NAME)
+
+/* Try to lock the named lock variable. */
+#define __libc_lock_trylock(NAME) \
+ (__pthread_mutex_trylock != NULL ? __pthread_mutex_trylock (&(NAME)) : 0)
+#define __libc_rwlock_tryrdlock(NAME) \
+ (__pthread_rwlock_tryrdlock != NULL \
+ ? __pthread_rwlock_tryrdlock (&(NAME)) : 0)
+#define __libc_rwlock_trywrlock(NAME) \
+ (__pthread_rwlock_trywrlock != NULL \
+ ? __pthread_rwlock_trywrlock (&(NAME)) : 0)
+
+/* Try to lock the recursive named lock variable. */
+#define __libc_lock_trylock_recursive(NAME) __libc_lock_trylock (NAME)
+
+/* Unlock the named lock variable. */
+#define __libc_lock_unlock(NAME) \
+ (__pthread_mutex_unlock != NULL ? __pthread_mutex_unlock (&(NAME)) : 0);
+#define __libc_rwlock_unlock(NAME) \
+ (__pthread_rwlock_unlock != NULL ? __pthread_rwlock_unlock (&(NAME)) : 0);
+
+/* Unlock the recursive named lock variable. */
+#define __libc_lock_unlock_recursive(NAME) __libc_lock_unlock (NAME)
+
+
+/* Define once control variable. */
+#if PTHREAD_ONCE_INIT == 0
+/* Special case for static variables where we can avoid the initialization
+ if it is zero. */
+# define __libc_once_define(CLASS, NAME) \
+ CLASS pthread_once_t NAME
+#else
+# define __libc_once_define(CLASS, NAME) \
+ CLASS pthread_once_t NAME = PTHREAD_ONCE_INIT
+#endif
+
+/* Call handler iff the first call. */
+#define __libc_once(ONCE_CONTROL, INIT_FUNCTION) \
+ do { \
+ if (__pthread_once != NULL) \
+ __pthread_once (&(ONCE_CONTROL), (INIT_FUNCTION)); \
+ else if ((ONCE_CONTROL) == PTHREAD_ONCE_INIT) { \
+ INIT_FUNCTION (); \
+ (ONCE_CONTROL) = !PTHREAD_ONCE_INIT; \
+ } \
+ } while (0)
+
+
+/* Start critical region with cleanup. */
+#define __libc_cleanup_region_start(FCT, ARG) \
+ { struct _pthread_cleanup_buffer _buffer; \
+ int _avail = _pthread_cleanup_push_defer != NULL; \
+ if (_avail) { \
+ _pthread_cleanup_push_defer (&_buffer, (FCT), (ARG)); \
+ }
+
+/* End critical region with cleanup. */
+#define __libc_cleanup_region_end(DOIT) \
+ if (_avail) { \
+ _pthread_cleanup_pop_restore (&_buffer, (DOIT)); \
+ } \
+ }
+
+/* Sometimes we have to exit the block in the middle. */
+#define __libc_cleanup_end(DOIT) \
+ if (_avail) { \
+ _pthread_cleanup_pop_restore (&_buffer, (DOIT)); \
+ }
+
+/* Create thread-specific key. */
+#define __libc_key_create(KEY, DESTRUCTOR) \
+ (__pthread_key_create != NULL ? __pthread_key_create (KEY, DESTRUCTOR) : 1)
+
+/* Get thread-specific data. */
+#define __libc_getspecific(KEY) \
+ (__pthread_getspecific != NULL ? __pthread_getspecific (KEY) : NULL)
+
+/* Set thread-specific data. */
+#define __libc_setspecific(KEY, VALUE) \
+ (__pthread_setspecific != NULL ? __pthread_setspecific (KEY, VALUE) : 0)
+
+
+/* Register handlers to execute before and after `fork'. */
+#define __libc_atfork(PREPARE, PARENT, CHILD) \
+ (__pthread_atfork != NULL ? __pthread_atfork (PREPARE, PARENT, CHILD) : 0)
+
+/* Functions that are used by this file and are internal to the GNU C
+ library. */
+
+extern int __pthread_mutex_init (pthread_mutex_t *__mutex,
+ __const pthread_mutexattr_t *__mutex_attr);
+
+extern int __pthread_mutex_destroy (pthread_mutex_t *__mutex);
+
+extern int __pthread_mutex_trylock (pthread_mutex_t *__mutex);
+
+extern int __pthread_mutex_lock (pthread_mutex_t *__mutex);
+
+extern int __pthread_mutex_unlock (pthread_mutex_t *__mutex);
+
+extern int __pthread_mutexattr_init (pthread_mutexattr_t *__attr);
+
+extern int __pthread_mutexattr_destroy (pthread_mutexattr_t *__attr);
+
+extern int __pthread_mutexattr_settype (pthread_mutexattr_t *__attr,
+ int __kind);
+
+#ifdef __USE_UNIX98
+extern int __pthread_rwlock_init (pthread_rwlock_t *__rwlock,
+ __const pthread_rwlockattr_t *__attr);
+
+extern int __pthread_rwlock_destroy (pthread_rwlock_t *__rwlock);
+
+extern int __pthread_rwlock_rdlock (pthread_rwlock_t *__rwlock);
+
+extern int __pthread_rwlock_tryrdlock (pthread_rwlock_t *__rwlock);
+
+extern int __pthread_rwlock_wrlock (pthread_rwlock_t *__rwlock);
+
+extern int __pthread_rwlock_trywrlock (pthread_rwlock_t *__rwlock);
+
+extern int __pthread_rwlock_unlock (pthread_rwlock_t *__rwlock);
+#endif
+
+extern int __pthread_key_create (pthread_key_t *__key,
+ void (*__destr_function) (void *));
+
+extern int __pthread_setspecific (pthread_key_t __key,
+ __const void *__pointer);
+
+extern void *__pthread_getspecific (pthread_key_t __key);
+
+extern int __pthread_once (pthread_once_t *__once_control,
+ void (*__init_routine) (void));
+
+extern int __pthread_atfork (void (*__prepare) (void),
+ void (*__parent) (void),
+ void (*__child) (void));
+
+
+
+/* Make the pthread functions weak so that we can elide them from
+ single-threaded processes. */
+#ifndef __NO_WEAK_PTHREAD_ALIASES
+# ifdef weak_extern
+# if _LIBC
+# include <bp-sym.h>
+# else
+# define BP_SYM (sym) sym
+# endif
+weak_extern (BP_SYM (__pthread_mutex_init))
+weak_extern (BP_SYM (__pthread_mutex_destroy))
+weak_extern (BP_SYM (__pthread_mutex_lock))
+weak_extern (BP_SYM (__pthread_mutex_trylock))
+weak_extern (BP_SYM (__pthread_mutex_unlock))
+weak_extern (BP_SYM (__pthread_mutexattr_init))
+weak_extern (BP_SYM (__pthread_mutexattr_destroy))
+weak_extern (BP_SYM (__pthread_mutexattr_settype))
+weak_extern (BP_SYM (__pthread_rwlock_init))
+weak_extern (BP_SYM (__pthread_rwlock_destroy))
+weak_extern (BP_SYM (__pthread_rwlock_rdlock))
+weak_extern (BP_SYM (__pthread_rwlock_tryrdlock))
+weak_extern (BP_SYM (__pthread_rwlock_wrlock))
+weak_extern (BP_SYM (__pthread_rwlock_trywrlock))
+weak_extern (BP_SYM (__pthread_rwlock_unlock))
+weak_extern (BP_SYM (__pthread_key_create))
+weak_extern (BP_SYM (__pthread_setspecific))
+weak_extern (BP_SYM (__pthread_getspecific))
+weak_extern (BP_SYM (__pthread_once))
+weak_extern (__pthread_initialize)
+weak_extern (__pthread_atfork)
+weak_extern (BP_SYM (_pthread_cleanup_push_defer))
+weak_extern (BP_SYM (_pthread_cleanup_pop_restore))
+# else
+# pragma weak __pthread_mutex_init
+# pragma weak __pthread_mutex_destroy
+# pragma weak __pthread_mutex_lock
+# pragma weak __pthread_mutex_trylock
+# pragma weak __pthread_mutex_unlock
+# pragma weak __pthread_mutexattr_init
+# pragma weak __pthread_mutexattr_destroy
+# pragma weak __pthread_mutexattr_settype
+# pragma weak __pthread_rwlock_destroy
+# pragma weak __pthread_rwlock_rdlock
+# pragma weak __pthread_rwlock_tryrdlock
+# pragma weak __pthread_rwlock_wrlock
+# pragma weak __pthread_rwlock_trywrlock
+# pragma weak __pthread_rwlock_unlock
+# pragma weak __pthread_key_create
+# pragma weak __pthread_setspecific
+# pragma weak __pthread_getspecific
+# pragma weak __pthread_once
+# pragma weak __pthread_initialize
+# pragma weak __pthread_atfork
+# pragma weak _pthread_cleanup_push_defer
+# pragma weak _pthread_cleanup_pop_restore
+# endif
+#endif
+
+/* We need portable names for some functions. E.g., when they are
+ used as argument to __libc_cleanup_region_start. */
+#define __libc_mutex_unlock __pthread_mutex_unlock
+
+#endif /* bits/libc-lock.h */