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diff --git a/libstdc++-v3/include/ext/pb_ds/detail/thin_heap_/erase_fn_imps.hpp b/libstdc++-v3/include/ext/pb_ds/detail/thin_heap_/erase_fn_imps.hpp
new file mode 100644
index 00000000..69afcd39
--- /dev/null
+++ b/libstdc++-v3/include/ext/pb_ds/detail/thin_heap_/erase_fn_imps.hpp
@@ -0,0 +1,296 @@
+// -*- C++ -*-
+
+// Copyright (C) 2005, 2006, 2009 Free Software Foundation, Inc.
+//
+// This file is part of the GNU ISO C++ Library.  This library is free
+// software; you can redistribute it and/or modify it under the terms
+// of the GNU General Public License as published by the Free Software
+// Foundation; either version 3, or (at your option) any later
+// version.
+
+// This 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
+// General Public License for more details.
+
+// Under Section 7 of GPL version 3, you are granted additional
+// permissions described in the GCC Runtime Library Exception, version
+// 3.1, as published by the Free Software Foundation.
+
+// You should have received a copy of the GNU General Public License and
+// a copy of the GCC Runtime Library Exception along with this program;
+// see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see
+// <http://www.gnu.org/licenses/>.
+
+// Copyright (C) 2004 Ami Tavory and Vladimir Dreizin, IBM-HRL.
+
+// Permission to use, copy, modify, sell, and distribute this software
+// is hereby granted without fee, provided that the above copyright
+// notice appears in all copies, and that both that copyright notice
+// and this permission notice appear in supporting documentation. None
+// of the above authors, nor IBM Haifa Research Laboratories, make any
+// representation about the suitability of this software for any
+// purpose. It is provided "as is" without express or implied
+// warranty.
+
+/**
+ * @file erase_fn_imps.hpp
+ * Contains an implementation for thin_heap_.
+ */
+
+PB_DS_CLASS_T_DEC
+void
+PB_DS_CLASS_C_DEC::
+pop()
+{
+  _GLIBCXX_DEBUG_ONLY(assert_valid();)
+    _GLIBCXX_DEBUG_ASSERT(!base_type::empty());
+
+  _GLIBCXX_DEBUG_ASSERT(m_p_max != NULL);
+
+  node_pointer p_nd = m_p_max;
+
+  remove_max_node();
+
+  base_type::actual_erase_node(p_nd);
+
+  _GLIBCXX_DEBUG_ONLY(assert_valid();)
+    }
+
+PB_DS_CLASS_T_DEC
+inline void
+PB_DS_CLASS_C_DEC::
+remove_max_node()
+{
+  to_aux_except_max();
+
+  make_from_aux();
+}
+
+PB_DS_CLASS_T_DEC
+void
+PB_DS_CLASS_C_DEC::
+to_aux_except_max()
+{
+  node_pointer p_add = base_type::m_p_root;
+
+  while (p_add != m_p_max)
+    {
+      node_pointer p_next_add = p_add->m_p_next_sibling;
+
+      add_to_aux(p_add);
+
+      p_add = p_next_add;
+    }
+
+  p_add = m_p_max->m_p_l_child;
+
+  while (p_add != NULL)
+    {
+      node_pointer p_next_add = p_add->m_p_next_sibling;
+
+      p_add->m_metadata = p_add->m_p_l_child == NULL?
+	0 :
+	p_add->m_p_l_child->m_metadata + 1;
+
+      add_to_aux(p_add);
+
+      p_add = p_next_add;
+    }
+
+  p_add = m_p_max->m_p_next_sibling;
+
+  while (p_add != NULL)
+    {
+      node_pointer p_next_add = p_add->m_p_next_sibling;
+
+      add_to_aux(p_add);
+
+      p_add = p_next_add;
+    }
+}
+
+PB_DS_CLASS_T_DEC
+inline void
+PB_DS_CLASS_C_DEC::
+add_to_aux(node_pointer p_nd)
+{
+  size_type r = p_nd->m_metadata;
+
+  while (m_a_aux[r] != NULL)
+    {
+      _GLIBCXX_DEBUG_ASSERT(p_nd->m_metadata < rank_bound());
+
+      if (Cmp_Fn::operator()(m_a_aux[r]->m_value, p_nd->m_value))
+	make_child_of(m_a_aux[r], p_nd);
+      else
+        {
+	  make_child_of(p_nd, m_a_aux[r]);
+
+	  p_nd = m_a_aux[r];
+        }
+
+      m_a_aux[r] = NULL;
+
+      ++r;
+    }
+
+  _GLIBCXX_DEBUG_ASSERT(p_nd->m_metadata < rank_bound());
+
+  m_a_aux[r] = p_nd;
+}
+
+PB_DS_CLASS_T_DEC
+inline void
+PB_DS_CLASS_C_DEC::
+make_child_of(node_pointer p_nd, node_pointer p_new_parent)
+{
+  _GLIBCXX_DEBUG_ASSERT(p_nd->m_metadata == p_new_parent->m_metadata);
+  _GLIBCXX_DEBUG_ASSERT(m_a_aux[p_nd->m_metadata] == p_nd ||
+		   m_a_aux[p_nd->m_metadata] == p_new_parent);
+
+  ++p_new_parent->m_metadata;
+
+  base_type::make_child_of(p_nd, p_new_parent);
+}
+
+PB_DS_CLASS_T_DEC
+inline void
+PB_DS_CLASS_C_DEC::
+make_from_aux()
+{
+  base_type::m_p_root = m_p_max = NULL;
+
+  const size_type rnk_bnd = rank_bound();
+
+  size_type i = 0;
+
+  while (i < rnk_bnd)
+    {
+      if (m_a_aux[i] != NULL)
+        {
+	  make_root_and_link(m_a_aux[i]);
+
+	  m_a_aux[i] = NULL;
+        }
+
+      ++i;
+    }
+
+  _GLIBCXX_DEBUG_ONLY(assert_aux_null();)
+    }
+
+PB_DS_CLASS_T_DEC
+inline void
+PB_DS_CLASS_C_DEC::
+remove_node(node_pointer p_nd)
+{
+  node_pointer p_parent = p_nd;
+  while (base_type::parent(p_parent) != NULL)
+    p_parent = base_type::parent(p_parent);
+
+  base_type::bubble_to_top(p_nd);
+
+  m_p_max = p_nd;
+
+  node_pointer p_fix = base_type::m_p_root;
+  while (p_fix != NULL&&  p_fix->m_p_next_sibling != p_parent)
+    p_fix = p_fix->m_p_next_sibling;
+
+  if (p_fix != NULL)
+    p_fix->m_p_next_sibling = p_nd;
+
+  remove_max_node();
+}
+
+PB_DS_CLASS_T_DEC
+inline void
+PB_DS_CLASS_C_DEC::
+clear()
+{
+  base_type::clear();
+
+  m_p_max = NULL;
+}
+
+PB_DS_CLASS_T_DEC
+void
+PB_DS_CLASS_C_DEC::
+erase(point_iterator it)
+{
+  _GLIBCXX_DEBUG_ONLY(assert_valid();)
+    _GLIBCXX_DEBUG_ASSERT(!base_type::empty());
+
+  node_pointer p_nd = it.m_p_nd;
+
+  remove_node(p_nd);
+
+  base_type::actual_erase_node(p_nd);
+
+  _GLIBCXX_DEBUG_ONLY(assert_valid();)
+    }
+
+PB_DS_CLASS_T_DEC
+template<typename Pred>
+typename PB_DS_CLASS_C_DEC::size_type
+PB_DS_CLASS_C_DEC::
+erase_if(Pred pred)
+{
+  _GLIBCXX_DEBUG_ONLY(assert_valid();)
+
+    if (base_type::empty())
+      {
+        _GLIBCXX_DEBUG_ONLY(assert_valid();)
+
+	  return 0;
+      }
+
+  base_type::to_linked_list();
+
+  node_pointer p_out = base_type::prune(pred);
+
+  size_type ersd = 0;
+
+  while (p_out != NULL)
+    {
+      ++ersd;
+
+      node_pointer p_next = p_out->m_p_next_sibling;
+
+      base_type::actual_erase_node(p_out);
+
+      p_out = p_next;
+    }
+
+  node_pointer p_cur = base_type::m_p_root;
+
+  m_p_max = base_type::m_p_root = NULL;
+
+  while (p_cur != NULL)
+    {
+      node_pointer p_next = p_cur->m_p_next_sibling;
+
+      make_root_and_link(p_cur);
+
+      p_cur = p_next;
+    }
+
+  _GLIBCXX_DEBUG_ONLY(assert_valid();)
+
+    return ersd;
+}
+
+PB_DS_CLASS_T_DEC
+inline typename PB_DS_CLASS_C_DEC::size_type
+PB_DS_CLASS_C_DEC::
+rank_bound()
+{
+  const std::size_t* const p_upper =
+    std::upper_bound(            g_a_rank_bounds, g_a_rank_bounds + num_distinct_rank_bounds, base_type::m_size);
+
+  if (p_upper == g_a_rank_bounds + num_distinct_rank_bounds)
+    return max_rank;
+
+  return (p_upper - g_a_rank_bounds);
+}
+