revert patch

[Andrew MacLeod <amacleod@redhat.com>]

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I had to revert a minor change in the last patch.  It didn't show any 
problems in an incremental bootstrap, but once from scratch showed a 
compile failure due to a duplicate definition.

I'll have to fix the lack of an atomic_thread_fence or 
atomic_signal_fence a different way apparently.

Sorry.  If you encounter this, you'll have to touch 
libstdc++-v3/src/*.cc in order to get the proper things rebuilt since 
the dependency seems to be missing on atomic_base.h.

I'll add that in when I do the proper fix later.  This will get everyone 
back up and running.

Sorry

Andrew


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  2011-11-07  Andrew MacLeod  <amacleod@redhat.com>

	* include/bits/atomic_base.h (atomic_thread_fence): Revert.
	(atomic_signal_fence): Revert.

Index: include/bits/atomic_base.h
===================================================================
*** include/bits/atomic_base.h	(revision 181118)
--- include/bits/atomic_base.h	(revision 181119)
*************** _GLIBCXX_BEGIN_NAMESPACE_VERSION
*** 69,84 ****
    }
  
    void
!   atomic_thread_fence(memory_order __m) noexcept
!   {
!     __atomic_thread_fence (__m);
!   }
  
    void
!   atomic_signal_fence(memory_order __m) noexcept
!   {
!     __atomic_signal_fence (__m);
!   }
  
    /// kill_dependency
    template<typename _Tp>
--- 69,78 ----
    }
  
    void
!   atomic_thread_fence(memory_order __m) noexcept;
  
    void
!   atomic_signal_fence(memory_order __m) noexcept;
  
    /// kill_dependency
    template<typename _Tp>