[COMMITTED PATCH] Make malloc build for no-threads configurations.

[Roland McGrath <roland at hack dot frob dot com>]

	* sysdeps/generic/malloc-machine.h (MUTEX_INITIALIZER): New macro.
	(atomic_full_barrier, atomic_read_barrier, atomic_write_barrier):
	Macros removed.
	* malloc/arena.c (save_malloc_hook, save_free_hook): Conditionalize on
	[!NO_THREADS].
	(malloc_atfork, free_atfork, atfork_recursive_cntr): Likewise.
	(ptmalloc_lock_all, ptmalloc_unlock_all, ptmalloc_unlock_all2):
	Likewise.


diff --git a/malloc/arena.c b/malloc/arena.c
index 06bdd77..9e5e332 100644
--- a/malloc/arena.c
+++ b/malloc/arena.c
@@ -141,6 +141,8 @@ int __malloc_initialized = -1;
 
 /**************************************************************************/
 
+#ifndef NO_THREADS
+
 /* atfork support.  */
 
 static __malloc_ptr_t (*save_malloc_hook) (size_t __size,
@@ -276,7 +278,7 @@ ptmalloc_unlock_all (void)
   (void)mutex_unlock(&list_lock);
 }
 
-#ifdef __linux__
+# ifdef __linux__
 
 /* In NPTL, unlocking a mutex in the child process after a
    fork() is currently unsafe, whereas re-initializing it is safe and
@@ -311,11 +313,13 @@ ptmalloc_unlock_all2 (void)
   atfork_recursive_cntr = 0;
 }
 
-#else
+# else
 
-#define ptmalloc_unlock_all2 ptmalloc_unlock_all
+#  define ptmalloc_unlock_all2 ptmalloc_unlock_all
 
-#endif
+# endif
+
+#endif  /* !NO_THREADS */
 
 /* Initialization routine. */
 #include <string.h>
diff --git a/malloc/malloc.c b/malloc/malloc.c
index 373e063..0f1796c 100644
--- a/malloc/malloc.c
+++ b/malloc/malloc.c
@@ -1075,9 +1075,10 @@ static void*   realloc_check(void* oldmem, size_t bytes,
 			       const void *caller);
 static void*   memalign_check(size_t alignment, size_t bytes,
 				const void *caller);
-/* These routines are never needed in this configuration.  */
+#ifndef NO_THREADS
 static void*   malloc_atfork(size_t sz, const void *caller);
 static void      free_atfork(void* mem, const void *caller);
+#endif
 
 
 /* ------------- Optional versions of memcopy ---------------- */
diff --git a/sysdeps/generic/malloc-machine.h b/sysdeps/generic/malloc-machine.h
index 03e9de5..851978a 100644
--- a/sysdeps/generic/malloc-machine.h
+++ b/sysdeps/generic/malloc-machine.h
@@ -1,6 +1,6 @@
 /* Basic platform-independent macro definitions for mutexes,
    thread-specific data and parameters for malloc.
-   Copyright (C) 2003 Free Software Foundation, Inc.
+   Copyright (C) 2003-2012 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
@@ -38,6 +38,7 @@ typedef int mutex_t;
 # define mutex_lock(m)              ((*(m) = 1), 0)
 # define mutex_trylock(m)           (*(m) ? 1 : ((*(m) = 1), 0))
 # define mutex_unlock(m)            (*(m) = 0)
+# define MUTEX_INITIALIZER      (0)
 
 typedef void *tsd_key_t;
 # define tsd_key_create(key, destr) do {} while(0)