+2016-04-13 Jonathan Wakely <jwakely@redhat.com>
+
+ * include/bits/c++config (_GLIBCXX_BEGIN_NAMESPACE_EMPTY_TYPES,
+ _GLIBCXX_END_NAMESPACE_EMPTY_TYPES, _GLIBCXX_ABI_TAG_EMPTY): Define.
+ * include/bits/hashtable.h (_Hashtable::_M_emplace): Change signatures
+ of functions taking empty structs by value. Add a template parameter
+ to overloads without hints. Rename overloads with hints to
+ _M_emplace_hint.
+ (_Hashtable::_M_erase(true_type, const_iterator),
+ _Hashtable::_M_erase(false_type, const_iterator)): Change signatures
+ by reordering parameters.
+ * include/bits/hashtable_policy.h (_Insert::insert): Adjust to call
+ _M_emplace_hint instead of _M_emplace.
+ * include/bits/shared_ptr.h (shared_ptr(_Tp1*, _Deleter, _Alloc),
+ shared_ptr(nullptr_t, _Deleter, _Alloc)): Use _GLIBCXX_ABI_TAG_EMPTY.
+ * include/bits/shared_ptr_base.h (_Sp_counted_deleter, __shared_count,
+ __shared_ptr): Likewise.
+ * include/bits/stl_algo.h (replace_if): Likewise.
+ * include/bits/stl_pair.h (piecewise_construct_t,
+ piecewise_construct): Use _GLIBCXX_BEGIN_NAMESPACE_EMPTY_TYPES.
+ * include/bits/uses_allocator.h (allocator_arg_t, allocator_arg,
+ __uses_alloc0): Likewise.
+ * include/ext/pb_ds/assoc_container.hpp (basic_hash_table): Likewise.
+ * testsuite/20_util/scoped_allocator/69293_neg.cc: Adjust dg-error.
+ * testsuite/20_util/shared_ptr/cons/43820_neg.cc: Likewise.
+ * testsuite/20_util/shared_ptr/cons/void_neg.cc: Likewise.
+ * testsuite/20_util/uses_allocator/69293_neg.cc: Likewise.
+ * testsuite/20_util/uses_allocator/cons_neg.cc: Likewise.
+ * testsuite/ext/profile/mutex_extensions_neg.cc: Likewise.
+