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diff --git a/indexlib/boost-compat/scoped_ptr.h b/indexlib/boost-compat/scoped_ptr.h
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+++ b/indexlib/boost-compat/scoped_ptr.h
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+#ifndef BOOST_SCOPED_PTR_H_INCLUDED
+#define BOOST_SCOPED_PTR_H_INCLUDED
+
+// ADAPTED FOR indexlib
+
+//  (C) Copyright Greg Colvin and Beman Dawes 1998, 1999.
+//  Copyright (c) 2001, 2002 Peter Dimov
+//
+//  Distributed under the Boost Software License, Version 1.0. (See
+//  accompanying file LICENSE_1_0.txt or copy at
+//  http://www.boost.org/LICENSE_1_0.txt)
+//
+//  http://www.boost.org/libs/smart_ptr/scoped_ptr.htm
+//
+
+#include "checked_delete.h"
+
+#include <memory>          // for std::auto_ptr
+#include <assert.h>
+
+namespace boost
+{
+
+
+//  scoped_ptr mimics a built-in pointer except that it guarantees deletion
+//  of the object pointed to, either on destruction of the scoped_ptr or via
+//  an explicit reset(). scoped_ptr is a simple solution for simple needs;
+//  use shared_ptr or std::auto_ptr if your needs are more complex.
+
+template<class T> class scoped_ptr // noncopyable
+{
+private:
+
+    T * ptr;
+
+    scoped_ptr(scoped_ptr const &);
+    scoped_ptr & operator=(scoped_ptr const &);
+
+    typedef scoped_ptr<T> this_type;
+
+public:
+
+    typedef T element_type;
+
+    explicit scoped_ptr(T * p = 0): ptr(p) // never throws
+    {
+    }
+
+
+    explicit scoped_ptr(std::auto_ptr<T> p): ptr(p.release()) // never throws
+    {
+    }
+
+    ~scoped_ptr() // never throws
+    {
+        boost::checked_delete(ptr);
+    }
+
+    void reset(T * p = 0) // never throws
+    {
+        assert(p == 0 || p != ptr); // catch self-reset errors
+        this_type(p).swap(*this);
+    }
+
+    T & operator*() const // never throws
+    {
+        assert(ptr != 0);
+        return *ptr;
+    }
+
+    T * operator->() const // never throws
+    {
+        assert(ptr != 0);
+        return ptr;
+    }
+
+    T * get() const // never throws
+    {
+        return ptr;
+    }
+
+    // implicit conversion to "bool"
+
+    typedef T * this_type::*unspecified_bool_type;
+
+    operator unspecified_bool_type() const // never throws
+    {
+        return ptr == 0? 0: &this_type::ptr;
+    }
+
+    bool operator! () const // never throws
+    {
+        return ptr == 0;
+    }
+
+    void swap(scoped_ptr & b) // never throws
+    {
+        T * tmp = b.ptr;
+        b.ptr = ptr;
+        ptr = tmp;
+    }
+};
+
+template<class T> inline void swap(scoped_ptr<T> & a, scoped_ptr<T> & b) // never throws
+{
+    a.swap(b);
+}
+
+// get_pointer(p) is a generic way to say p.get()
+
+template<class T> inline T * get_pointer(scoped_ptr<T> const & p)
+{
+    return p.get();
+}
+
+} // namespace boost
+
+#endif // #ifndef BOOST_SCOPED_PTR_H_INCLUDED