diff --git a/libcxx/include/__memory_resource/memory_resource.h b/libcxx/include/__memory_resource/memory_resource.h
--- a/libcxx/include/__memory_resource/memory_resource.h
+++ b/libcxx/include/__memory_resource/memory_resource.h
@@ -24,13 +24,11 @@
 
 // [mem.res.class]
 
-_LIBCPP_DIAGNOSTIC_PUSH
-_LIBCPP_CLANG_DIAGNOSTIC_IGNORED("-Wweak-vtables") // TODO: move destructor into the dylib
 class _LIBCPP_TYPE_VIS memory_resource {
   static const size_t __max_align = alignof(max_align_t);
 
 public:
-  virtual ~memory_resource() = default;
+  virtual ~memory_resource();
 
   [[using __gnu__: __returns_nonnull__, __alloc_size__(2), __alloc_align__(3)]] _LIBCPP_HIDE_FROM_ABI void*
   allocate(size_t __bytes, size_t __align = __max_align) {
@@ -49,7 +47,6 @@
   virtual void do_deallocate(void*, size_t, size_t)               = 0;
   virtual bool do_is_equal(memory_resource const&) const noexcept = 0;
 };
-_LIBCPP_DIAGNOSTIC_POP
 
 // [mem.res.eq]
 
diff --git a/libcxx/lib/abi/CHANGELOG.TXT b/libcxx/lib/abi/CHANGELOG.TXT
--- a/libcxx/lib/abi/CHANGELOG.TXT
+++ b/libcxx/lib/abi/CHANGELOG.TXT
@@ -16,6 +16,15 @@
 Version 16.0
 ------------
 
+* [libc++][PMR] Move the pmr::memory_resource destructor into the dylib
+
+  All platforms
+  -------------
+  Symbol added: _ZNSt3__13pmr15memory_resourceD0Ev
+  Symbol added: _ZNSt3__13pmr15memory_resourceD1Ev
+  Symbol added: _ZNSt3__13pmr15memory_resourceD2Ev
+  Symbol added: _ZTVNSt3__13pmr15memory_resourceE
+
 * [libc++] [C++17] Implement <memory_resource>.
 
   This commit adds <memory_resource> to the shared library.
diff --git a/libcxx/lib/abi/arm64-apple-darwin.libcxxabi.v1.stable.exceptions.nonew.abilist b/libcxx/lib/abi/arm64-apple-darwin.libcxxabi.v1.stable.exceptions.nonew.abilist
--- a/libcxx/lib/abi/arm64-apple-darwin.libcxxabi.v1.stable.exceptions.nonew.abilist
+++ b/libcxx/lib/abi/arm64-apple-darwin.libcxxabi.v1.stable.exceptions.nonew.abilist
@@ -1559,6 +1559,9 @@
 {'is_defined': True, 'name': '__ZNSt3__132__destroy_barrier_algorithm_baseEPNS_24__barrier_algorithm_baseE', 'type': 'FUNC'}
 {'is_defined': True, 'name': '__ZNSt3__134__construct_barrier_algorithm_baseERl', 'type': 'FUNC'}
 {'is_defined': True, 'name': '__ZNSt3__13cinE', 'size': 0, 'type': 'OBJECT'}
+{'is_defined': True, 'name': '__ZNSt3__13pmr15memory_resourceD0Ev', 'type': 'FUNC'}
+{'is_defined': True, 'name': '__ZNSt3__13pmr15memory_resourceD1Ev', 'type': 'FUNC'}
+{'is_defined': True, 'name': '__ZNSt3__13pmr15memory_resourceD2Ev', 'type': 'FUNC'}
 {'is_defined': True, 'name': '__ZNSt3__13pmr19new_delete_resourceEv', 'type': 'FUNC'}
 {'is_defined': True, 'name': '__ZNSt3__13pmr20get_default_resourceEv', 'type': 'FUNC'}
 {'is_defined': True, 'name': '__ZNSt3__13pmr20null_memory_resourceEv', 'type': 'FUNC'}
@@ -2034,6 +2037,7 @@
 {'is_defined': True, 'name': '__ZTINSt3__120__codecvt_utf8_utf16IDiEE', 'size': 0, 'type': 'OBJECT'}
 {'is_defined': True, 'name': '__ZTINSt3__120__codecvt_utf8_utf16IDsEE', 'size': 0, 'type': 'OBJECT'}
 {'is_defined': True, 'name': '__ZTINSt3__120__codecvt_utf8_utf16IwEE', 'size': 0, 'type': 'OBJECT'}
+{'is_defined': True, 'name': '__ZTINSt3__13pmr15memory_resourceE', 'size': 0, 'type': 'OBJECT'}
 {'is_defined': True, 'name': '__ZTINSt3__13pmr25monotonic_buffer_resourceE', 'size': 0, 'type': 'OBJECT'}
 {'is_defined': True, 'name': '__ZTINSt3__13pmr26synchronized_pool_resourceE', 'size': 0, 'type': 'OBJECT'}
 {'is_defined': True, 'name': '__ZTINSt3__13pmr28unsynchronized_pool_resourceE', 'size': 0, 'type': 'OBJECT'}
@@ -2205,6 +2209,7 @@
 {'is_defined': True, 'name': '__ZTSNSt3__118basic_stringstreamIcNS_11char_traitsIcEENS_9allocatorIcEEEE', 'size': 0, 'type': 'OBJECT'}
 {'is_defined': True, 'name': '__ZTSNSt3__119basic_istringstreamIcNS_11char_traitsIcEENS_9allocatorIcEEEE', 'size': 0, 'type': 'OBJECT'}
 {'is_defined': True, 'name': '__ZTSNSt3__119basic_ostringstreamIcNS_11char_traitsIcEENS_9allocatorIcEEEE', 'size': 0, 'type': 'OBJECT'}
+{'is_defined': True, 'name': '__ZTSNSt3__13pmr15memory_resourceE', 'size': 0, 'type': 'OBJECT'}
 {'is_defined': True, 'name': '__ZTSNSt3__13pmr25monotonic_buffer_resourceE', 'size': 0, 'type': 'OBJECT'}
 {'is_defined': True, 'name': '__ZTSNSt3__13pmr26synchronized_pool_resourceE', 'size': 0, 'type': 'OBJECT'}
 {'is_defined': True, 'name': '__ZTSNSt3__13pmr28unsynchronized_pool_resourceE', 'size': 0, 'type': 'OBJECT'}
@@ -2411,6 +2416,7 @@
 {'is_defined': True, 'name': '__ZTVNSt3__120__codecvt_utf8_utf16IDiEE', 'size': 0, 'type': 'OBJECT'}
 {'is_defined': True, 'name': '__ZTVNSt3__120__codecvt_utf8_utf16IDsEE', 'size': 0, 'type': 'OBJECT'}
 {'is_defined': True, 'name': '__ZTVNSt3__120__codecvt_utf8_utf16IwEE', 'size': 0, 'type': 'OBJECT'}
+{'is_defined': True, 'name': '__ZTVNSt3__13pmr15memory_resourceE', 'size': 0, 'type': 'OBJECT'}
 {'is_defined': True, 'name': '__ZTVNSt3__13pmr25monotonic_buffer_resourceE', 'size': 0, 'type': 'OBJECT'}
 {'is_defined': True, 'name': '__ZTVNSt3__13pmr26synchronized_pool_resourceE', 'size': 0, 'type': 'OBJECT'}
 {'is_defined': True, 'name': '__ZTVNSt3__13pmr28unsynchronized_pool_resourceE', 'size': 0, 'type': 'OBJECT'}
diff --git a/libcxx/lib/abi/powerpc-ibm-aix.libcxxabi.v1.stable.exceptions.nonew.abilist b/libcxx/lib/abi/powerpc-ibm-aix.libcxxabi.v1.stable.exceptions.nonew.abilist
--- a/libcxx/lib/abi/powerpc-ibm-aix.libcxxabi.v1.stable.exceptions.nonew.abilist
+++ b/libcxx/lib/abi/powerpc-ibm-aix.libcxxabi.v1.stable.exceptions.nonew.abilist
@@ -578,6 +578,9 @@
 {'import_export': 'EXP', 'is_defined': True, 'name': '_ZNSt3__132__destroy_barrier_algorithm_baseEPNS_24__barrier_algorithm_baseE', 'storage_mapping_class': 'DS', 'type': 'FUNC'}
 {'import_export': 'EXP', 'is_defined': True, 'name': '_ZNSt3__134__construct_barrier_algorithm_baseERl', 'storage_mapping_class': 'DS', 'type': 'FUNC'}
 {'import_export': 'EXP', 'is_defined': True, 'name': '_ZNSt3__13cinE', 'storage_mapping_class': 'RW', 'type': 'OBJECT'}
+{'import_export': 'EXP', 'is_defined': True, 'name': '_ZNSt3__13pmr15memory_resourceD0Ev', 'storage_mapping_class': 'DS', 'type': 'FUNC'}
+{'import_export': 'EXP', 'is_defined': True, 'name': '_ZNSt3__13pmr15memory_resourceD1Ev', 'storage_mapping_class': 'DS', 'type': 'FUNC'}
+{'import_export': 'EXP', 'is_defined': True, 'name': '_ZNSt3__13pmr15memory_resourceD2Ev', 'storage_mapping_class': 'DS', 'type': 'FUNC'}
 {'import_export': 'EXP', 'is_defined': True, 'name': '_ZNSt3__13pmr19new_delete_resourceEv', 'storage_mapping_class': 'DS', 'type': 'FUNC'}
 {'import_export': 'EXP', 'is_defined': True, 'name': '_ZNSt3__13pmr20get_default_resourceEv', 'storage_mapping_class': 'DS', 'type': 'FUNC'}
 {'import_export': 'EXP', 'is_defined': True, 'name': '_ZNSt3__13pmr20null_memory_resourceEv', 'storage_mapping_class': 'DS', 'type': 'FUNC'}
@@ -914,6 +917,7 @@
 {'import_export': 'EXP', 'is_defined': True, 'name': '_ZTINSt3__120__codecvt_utf8_utf16IDiEE', 'storage_mapping_class': 'RW', 'type': 'OBJECT'}
 {'import_export': 'EXP', 'is_defined': True, 'name': '_ZTINSt3__120__codecvt_utf8_utf16IDsEE', 'storage_mapping_class': 'RW', 'type': 'OBJECT'}
 {'import_export': 'EXP', 'is_defined': True, 'name': '_ZTINSt3__120__codecvt_utf8_utf16IwEE', 'storage_mapping_class': 'RW', 'type': 'OBJECT'}
+{'import_export': 'EXP', 'is_defined': True, 'name': '_ZTINSt3__13pmr15memory_resourceE', 'storage_mapping_class': 'RW', 'type': 'OBJECT'}
 {'import_export': 'EXP', 'is_defined': True, 'name': '_ZTINSt3__13pmr25monotonic_buffer_resourceE', 'storage_mapping_class': 'RW', 'type': 'OBJECT'}
 {'import_export': 'EXP', 'is_defined': True, 'name': '_ZTINSt3__13pmr26synchronized_pool_resourceE', 'storage_mapping_class': 'RW', 'type': 'OBJECT'}
 {'import_export': 'EXP', 'is_defined': True, 'name': '_ZTINSt3__13pmr28unsynchronized_pool_resourceE', 'storage_mapping_class': 'RW', 'type': 'OBJECT'}
@@ -972,6 +976,7 @@
 {'import_export': 'EXP', 'is_defined': True, 'name': '_ZTSNSt3__120__codecvt_utf8_utf16IDiEE', 'storage_mapping_class': 'RO', 'type': 'OBJECT'}
 {'import_export': 'EXP', 'is_defined': True, 'name': '_ZTSNSt3__120__codecvt_utf8_utf16IDsEE', 'storage_mapping_class': 'RO', 'type': 'OBJECT'}
 {'import_export': 'EXP', 'is_defined': True, 'name': '_ZTSNSt3__120__codecvt_utf8_utf16IwEE', 'storage_mapping_class': 'RO', 'type': 'OBJECT'}
+{'import_export': 'EXP', 'is_defined': True, 'name': '_ZTSNSt3__13pmr15memory_resourceE', 'storage_mapping_class': 'RO', 'type': 'OBJECT'}
 {'import_export': 'EXP', 'is_defined': True, 'name': '_ZTSNSt3__13pmr25monotonic_buffer_resourceE', 'storage_mapping_class': 'RO', 'type': 'OBJECT'}
 {'import_export': 'EXP', 'is_defined': True, 'name': '_ZTSNSt3__13pmr26synchronized_pool_resourceE', 'storage_mapping_class': 'RO', 'type': 'OBJECT'}
 {'import_export': 'EXP', 'is_defined': True, 'name': '_ZTSNSt3__13pmr28unsynchronized_pool_resourceE', 'storage_mapping_class': 'RO', 'type': 'OBJECT'}
@@ -1033,6 +1038,7 @@
 {'import_export': 'EXP', 'is_defined': True, 'name': '_ZTVNSt3__120__codecvt_utf8_utf16IDiEE', 'storage_mapping_class': 'RW', 'type': 'OBJECT'}
 {'import_export': 'EXP', 'is_defined': True, 'name': '_ZTVNSt3__120__codecvt_utf8_utf16IDsEE', 'storage_mapping_class': 'RW', 'type': 'OBJECT'}
 {'import_export': 'EXP', 'is_defined': True, 'name': '_ZTVNSt3__120__codecvt_utf8_utf16IwEE', 'storage_mapping_class': 'RW', 'type': 'OBJECT'}
+{'import_export': 'EXP', 'is_defined': True, 'name': '_ZTVNSt3__13pmr15memory_resourceE', 'storage_mapping_class': 'RW', 'type': 'OBJECT'}
 {'import_export': 'EXP', 'is_defined': True, 'name': '_ZTVNSt3__13pmr25monotonic_buffer_resourceE', 'storage_mapping_class': 'RW', 'type': 'OBJECT'}
 {'import_export': 'EXP', 'is_defined': True, 'name': '_ZTVNSt3__13pmr26synchronized_pool_resourceE', 'storage_mapping_class': 'RW', 'type': 'OBJECT'}
 {'import_export': 'EXP', 'is_defined': True, 'name': '_ZTVNSt3__13pmr28unsynchronized_pool_resourceE', 'storage_mapping_class': 'RW', 'type': 'OBJECT'}
@@ -1852,7 +1858,6 @@
 {'import_export': 'wEXP', 'is_defined': True, 'name': '_ZTINSt3__119basic_ostringstreamIcNS_11char_traitsIcEENS_9allocatorIcEEEE', 'storage_mapping_class': 'RW', 'type': 'OBJECT'}
 {'import_export': 'wEXP', 'is_defined': True, 'name': '_ZTINSt3__120__time_get_c_storageIcEE', 'storage_mapping_class': 'RW', 'type': 'OBJECT'}
 {'import_export': 'wEXP', 'is_defined': True, 'name': '_ZTINSt3__120__time_get_c_storageIwEE', 'storage_mapping_class': 'RW', 'type': 'OBJECT'}
-{'import_export': 'wEXP', 'is_defined': True, 'name': '_ZTINSt3__13pmr15memory_resourceE', 'storage_mapping_class': 'RW', 'type': 'OBJECT'}
 {'import_export': 'wEXP', 'is_defined': True, 'name': '_ZTINSt3__13pmr26__null_memory_resource_impE', 'storage_mapping_class': 'RW', 'type': 'OBJECT'}
 {'import_export': 'wEXP', 'is_defined': True, 'name': '_ZTINSt3__13pmr32__new_delete_memory_resource_impE', 'storage_mapping_class': 'RW', 'type': 'OBJECT'}
 {'import_export': 'wEXP', 'is_defined': True, 'name': '_ZTINSt3__17collateIcEE', 'storage_mapping_class': 'RW', 'type': 'OBJECT'}
@@ -1928,7 +1933,6 @@
 {'import_export': 'wEXP', 'is_defined': True, 'name': '_ZTSNSt3__119basic_ostringstreamIcNS_11char_traitsIcEENS_9allocatorIcEEEE', 'storage_mapping_class': 'RO', 'type': 'OBJECT'}
 {'import_export': 'wEXP', 'is_defined': True, 'name': '_ZTSNSt3__120__time_get_c_storageIcEE', 'storage_mapping_class': 'RO', 'type': 'OBJECT'}
 {'import_export': 'wEXP', 'is_defined': True, 'name': '_ZTSNSt3__120__time_get_c_storageIwEE', 'storage_mapping_class': 'RO', 'type': 'OBJECT'}
-{'import_export': 'wEXP', 'is_defined': True, 'name': '_ZTSNSt3__13pmr15memory_resourceE', 'storage_mapping_class': 'RO', 'type': 'OBJECT'}
 {'import_export': 'wEXP', 'is_defined': True, 'name': '_ZTSNSt3__13pmr26__null_memory_resource_impE', 'storage_mapping_class': 'RO', 'type': 'OBJECT'}
 {'import_export': 'wEXP', 'is_defined': True, 'name': '_ZTSNSt3__13pmr32__new_delete_memory_resource_impE', 'storage_mapping_class': 'RO', 'type': 'OBJECT'}
 {'import_export': 'wEXP', 'is_defined': True, 'name': '_ZTSNSt3__17collateIcEE', 'storage_mapping_class': 'RO', 'type': 'OBJECT'}
diff --git a/libcxx/lib/abi/powerpc64-ibm-aix.libcxxabi.v1.stable.exceptions.nonew.abilist b/libcxx/lib/abi/powerpc64-ibm-aix.libcxxabi.v1.stable.exceptions.nonew.abilist
--- a/libcxx/lib/abi/powerpc64-ibm-aix.libcxxabi.v1.stable.exceptions.nonew.abilist
+++ b/libcxx/lib/abi/powerpc64-ibm-aix.libcxxabi.v1.stable.exceptions.nonew.abilist
@@ -578,6 +578,9 @@
 {'import_export': 'EXP', 'is_defined': True, 'name': '_ZNSt3__132__destroy_barrier_algorithm_baseEPNS_24__barrier_algorithm_baseE', 'storage_mapping_class': 'DS', 'type': 'FUNC'}
 {'import_export': 'EXP', 'is_defined': True, 'name': '_ZNSt3__134__construct_barrier_algorithm_baseERl', 'storage_mapping_class': 'DS', 'type': 'FUNC'}
 {'import_export': 'EXP', 'is_defined': True, 'name': '_ZNSt3__13cinE', 'storage_mapping_class': 'RW', 'type': 'OBJECT'}
+{'import_export': 'EXP', 'is_defined': True, 'name': '_ZNSt3__13pmr15memory_resourceD0Ev', 'storage_mapping_class': 'DS', 'type': 'FUNC'}
+{'import_export': 'EXP', 'is_defined': True, 'name': '_ZNSt3__13pmr15memory_resourceD1Ev', 'storage_mapping_class': 'DS', 'type': 'FUNC'}
+{'import_export': 'EXP', 'is_defined': True, 'name': '_ZNSt3__13pmr15memory_resourceD2Ev', 'storage_mapping_class': 'DS', 'type': 'FUNC'}
 {'import_export': 'EXP', 'is_defined': True, 'name': '_ZNSt3__13pmr19new_delete_resourceEv', 'storage_mapping_class': 'DS', 'type': 'FUNC'}
 {'import_export': 'EXP', 'is_defined': True, 'name': '_ZNSt3__13pmr20get_default_resourceEv', 'storage_mapping_class': 'DS', 'type': 'FUNC'}
 {'import_export': 'EXP', 'is_defined': True, 'name': '_ZNSt3__13pmr20null_memory_resourceEv', 'storage_mapping_class': 'DS', 'type': 'FUNC'}
@@ -914,6 +917,7 @@
 {'import_export': 'EXP', 'is_defined': True, 'name': '_ZTINSt3__120__codecvt_utf8_utf16IDiEE', 'storage_mapping_class': 'RW', 'type': 'OBJECT'}
 {'import_export': 'EXP', 'is_defined': True, 'name': '_ZTINSt3__120__codecvt_utf8_utf16IDsEE', 'storage_mapping_class': 'RW', 'type': 'OBJECT'}
 {'import_export': 'EXP', 'is_defined': True, 'name': '_ZTINSt3__120__codecvt_utf8_utf16IwEE', 'storage_mapping_class': 'RW', 'type': 'OBJECT'}
+{'import_export': 'EXP', 'is_defined': True, 'name': '_ZTINSt3__13pmr15memory_resourceE', 'storage_mapping_class': 'RW', 'type': 'OBJECT'}
 {'import_export': 'EXP', 'is_defined': True, 'name': '_ZTINSt3__13pmr25monotonic_buffer_resourceE', 'storage_mapping_class': 'RW', 'type': 'OBJECT'}
 {'import_export': 'EXP', 'is_defined': True, 'name': '_ZTINSt3__13pmr26synchronized_pool_resourceE', 'storage_mapping_class': 'RW', 'type': 'OBJECT'}
 {'import_export': 'EXP', 'is_defined': True, 'name': '_ZTINSt3__13pmr28unsynchronized_pool_resourceE', 'storage_mapping_class': 'RW', 'type': 'OBJECT'}
@@ -972,6 +976,7 @@
 {'import_export': 'EXP', 'is_defined': True, 'name': '_ZTSNSt3__120__codecvt_utf8_utf16IDiEE', 'storage_mapping_class': 'RO', 'type': 'OBJECT'}
 {'import_export': 'EXP', 'is_defined': True, 'name': '_ZTSNSt3__120__codecvt_utf8_utf16IDsEE', 'storage_mapping_class': 'RO', 'type': 'OBJECT'}
 {'import_export': 'EXP', 'is_defined': True, 'name': '_ZTSNSt3__120__codecvt_utf8_utf16IwEE', 'storage_mapping_class': 'RO', 'type': 'OBJECT'}
+{'import_export': 'EXP', 'is_defined': True, 'name': '_ZTSNSt3__13pmr15memory_resourceE', 'storage_mapping_class': 'RO', 'type': 'OBJECT'}
 {'import_export': 'EXP', 'is_defined': True, 'name': '_ZTSNSt3__13pmr25monotonic_buffer_resourceE', 'storage_mapping_class': 'RO', 'type': 'OBJECT'}
 {'import_export': 'EXP', 'is_defined': True, 'name': '_ZTSNSt3__13pmr26synchronized_pool_resourceE', 'storage_mapping_class': 'RO', 'type': 'OBJECT'}
 {'import_export': 'EXP', 'is_defined': True, 'name': '_ZTSNSt3__13pmr28unsynchronized_pool_resourceE', 'storage_mapping_class': 'RO', 'type': 'OBJECT'}
@@ -1033,6 +1038,7 @@
 {'import_export': 'EXP', 'is_defined': True, 'name': '_ZTVNSt3__120__codecvt_utf8_utf16IDiEE', 'storage_mapping_class': 'RW', 'type': 'OBJECT'}
 {'import_export': 'EXP', 'is_defined': True, 'name': '_ZTVNSt3__120__codecvt_utf8_utf16IDsEE', 'storage_mapping_class': 'RW', 'type': 'OBJECT'}
 {'import_export': 'EXP', 'is_defined': True, 'name': '_ZTVNSt3__120__codecvt_utf8_utf16IwEE', 'storage_mapping_class': 'RW', 'type': 'OBJECT'}
+{'import_export': 'EXP', 'is_defined': True, 'name': '_ZTVNSt3__13pmr15memory_resourceE', 'storage_mapping_class': 'RW', 'type': 'OBJECT'}
 {'import_export': 'EXP', 'is_defined': True, 'name': '_ZTVNSt3__13pmr25monotonic_buffer_resourceE', 'storage_mapping_class': 'RW', 'type': 'OBJECT'}
 {'import_export': 'EXP', 'is_defined': True, 'name': '_ZTVNSt3__13pmr26synchronized_pool_resourceE', 'storage_mapping_class': 'RW', 'type': 'OBJECT'}
 {'import_export': 'EXP', 'is_defined': True, 'name': '_ZTVNSt3__13pmr28unsynchronized_pool_resourceE', 'storage_mapping_class': 'RW', 'type': 'OBJECT'}
@@ -1852,7 +1858,6 @@
 {'import_export': 'wEXP', 'is_defined': True, 'name': '_ZTINSt3__119basic_ostringstreamIcNS_11char_traitsIcEENS_9allocatorIcEEEE', 'storage_mapping_class': 'RW', 'type': 'OBJECT'}
 {'import_export': 'wEXP', 'is_defined': True, 'name': '_ZTINSt3__120__time_get_c_storageIcEE', 'storage_mapping_class': 'RW', 'type': 'OBJECT'}
 {'import_export': 'wEXP', 'is_defined': True, 'name': '_ZTINSt3__120__time_get_c_storageIwEE', 'storage_mapping_class': 'RW', 'type': 'OBJECT'}
-{'import_export': 'wEXP', 'is_defined': True, 'name': '_ZTINSt3__13pmr15memory_resourceE', 'storage_mapping_class': 'RW', 'type': 'OBJECT'}
 {'import_export': 'wEXP', 'is_defined': True, 'name': '_ZTINSt3__13pmr26__null_memory_resource_impE', 'storage_mapping_class': 'RW', 'type': 'OBJECT'}
 {'import_export': 'wEXP', 'is_defined': True, 'name': '_ZTINSt3__13pmr32__new_delete_memory_resource_impE', 'storage_mapping_class': 'RW', 'type': 'OBJECT'}
 {'import_export': 'wEXP', 'is_defined': True, 'name': '_ZTINSt3__17collateIcEE', 'storage_mapping_class': 'RW', 'type': 'OBJECT'}
@@ -1928,7 +1933,6 @@
 {'import_export': 'wEXP', 'is_defined': True, 'name': '_ZTSNSt3__119basic_ostringstreamIcNS_11char_traitsIcEENS_9allocatorIcEEEE', 'storage_mapping_class': 'RO', 'type': 'OBJECT'}
 {'import_export': 'wEXP', 'is_defined': True, 'name': '_ZTSNSt3__120__time_get_c_storageIcEE', 'storage_mapping_class': 'RO', 'type': 'OBJECT'}
 {'import_export': 'wEXP', 'is_defined': True, 'name': '_ZTSNSt3__120__time_get_c_storageIwEE', 'storage_mapping_class': 'RO', 'type': 'OBJECT'}
-{'import_export': 'wEXP', 'is_defined': True, 'name': '_ZTSNSt3__13pmr15memory_resourceE', 'storage_mapping_class': 'RO', 'type': 'OBJECT'}
 {'import_export': 'wEXP', 'is_defined': True, 'name': '_ZTSNSt3__13pmr26__null_memory_resource_impE', 'storage_mapping_class': 'RO', 'type': 'OBJECT'}
 {'import_export': 'wEXP', 'is_defined': True, 'name': '_ZTSNSt3__13pmr32__new_delete_memory_resource_impE', 'storage_mapping_class': 'RO', 'type': 'OBJECT'}
 {'import_export': 'wEXP', 'is_defined': True, 'name': '_ZTSNSt3__17collateIcEE', 'storage_mapping_class': 'RO', 'type': 'OBJECT'}
diff --git a/libcxx/lib/abi/x86_64-apple-darwin.libcxxabi.v1.stable.exceptions.nonew.abilist b/libcxx/lib/abi/x86_64-apple-darwin.libcxxabi.v1.stable.exceptions.nonew.abilist
--- a/libcxx/lib/abi/x86_64-apple-darwin.libcxxabi.v1.stable.exceptions.nonew.abilist
+++ b/libcxx/lib/abi/x86_64-apple-darwin.libcxxabi.v1.stable.exceptions.nonew.abilist
@@ -1559,6 +1559,9 @@
 {'is_defined': True, 'name': '__ZNSt3__132__destroy_barrier_algorithm_baseEPNS_24__barrier_algorithm_baseE', 'type': 'FUNC'}
 {'is_defined': True, 'name': '__ZNSt3__134__construct_barrier_algorithm_baseERl', 'type': 'FUNC'}
 {'is_defined': True, 'name': '__ZNSt3__13cinE', 'size': 0, 'type': 'OBJECT'}
+{'is_defined': True, 'name': '__ZNSt3__13pmr15memory_resourceD0Ev', 'type': 'FUNC'}
+{'is_defined': True, 'name': '__ZNSt3__13pmr15memory_resourceD1Ev', 'type': 'FUNC'}
+{'is_defined': True, 'name': '__ZNSt3__13pmr15memory_resourceD2Ev', 'type': 'FUNC'}
 {'is_defined': True, 'name': '__ZNSt3__13pmr19new_delete_resourceEv', 'type': 'FUNC'}
 {'is_defined': True, 'name': '__ZNSt3__13pmr20get_default_resourceEv', 'type': 'FUNC'}
 {'is_defined': True, 'name': '__ZNSt3__13pmr20null_memory_resourceEv', 'type': 'FUNC'}
@@ -2447,6 +2450,7 @@
 {'is_defined': True, 'name': '__ZTVNSt3__120__codecvt_utf8_utf16IDiEE', 'size': 0, 'type': 'OBJECT'}
 {'is_defined': True, 'name': '__ZTVNSt3__120__codecvt_utf8_utf16IDsEE', 'size': 0, 'type': 'OBJECT'}
 {'is_defined': True, 'name': '__ZTVNSt3__120__codecvt_utf8_utf16IwEE', 'size': 0, 'type': 'OBJECT'}
+{'is_defined': True, 'name': '__ZTVNSt3__13pmr15memory_resourceE', 'size': 0, 'type': 'OBJECT'}
 {'is_defined': True, 'name': '__ZTVNSt3__13pmr25monotonic_buffer_resourceE', 'size': 0, 'type': 'OBJECT'}
 {'is_defined': True, 'name': '__ZTVNSt3__13pmr26synchronized_pool_resourceE', 'size': 0, 'type': 'OBJECT'}
 {'is_defined': True, 'name': '__ZTVNSt3__13pmr28unsynchronized_pool_resourceE', 'size': 0, 'type': 'OBJECT'}
diff --git a/libcxx/lib/abi/x86_64-unknown-linux-gnu.libcxxabi.v1.stable.exceptions.nonew.abilist b/libcxx/lib/abi/x86_64-unknown-linux-gnu.libcxxabi.v1.stable.exceptions.nonew.abilist
--- a/libcxx/lib/abi/x86_64-unknown-linux-gnu.libcxxabi.v1.stable.exceptions.nonew.abilist
+++ b/libcxx/lib/abi/x86_64-unknown-linux-gnu.libcxxabi.v1.stable.exceptions.nonew.abilist
@@ -1252,6 +1252,9 @@
 {'is_defined': True, 'name': '_ZNSt3__132__destroy_barrier_algorithm_baseEPNS_24__barrier_algorithm_baseE', 'type': 'FUNC'}
 {'is_defined': True, 'name': '_ZNSt3__134__construct_barrier_algorithm_baseERl', 'type': 'FUNC'}
 {'is_defined': True, 'name': '_ZNSt3__13cinE', 'size': 168, 'type': 'OBJECT'}
+{'is_defined': True, 'name': '_ZNSt3__13pmr15memory_resourceD0Ev', 'type': 'FUNC'}
+{'is_defined': True, 'name': '_ZNSt3__13pmr15memory_resourceD1Ev', 'type': 'FUNC'}
+{'is_defined': True, 'name': '_ZNSt3__13pmr15memory_resourceD2Ev', 'type': 'FUNC'}
 {'is_defined': True, 'name': '_ZNSt3__13pmr19new_delete_resourceEv', 'type': 'FUNC'}
 {'is_defined': True, 'name': '_ZNSt3__13pmr20get_default_resourceEv', 'type': 'FUNC'}
 {'is_defined': True, 'name': '_ZNSt3__13pmr20null_memory_resourceEv', 'type': 'FUNC'}
@@ -1984,6 +1987,7 @@
 {'is_defined': True, 'name': '_ZTVNSt3__120__codecvt_utf8_utf16IDiEE', 'size': 96, 'type': 'OBJECT'}
 {'is_defined': True, 'name': '_ZTVNSt3__120__codecvt_utf8_utf16IDsEE', 'size': 96, 'type': 'OBJECT'}
 {'is_defined': True, 'name': '_ZTVNSt3__120__codecvt_utf8_utf16IwEE', 'size': 96, 'type': 'OBJECT'}
+{'is_defined': True, 'name': '_ZTVNSt3__13pmr15memory_resourceE', 'size': 56, 'type': 'OBJECT'}
 {'is_defined': True, 'name': '_ZTVNSt3__13pmr25monotonic_buffer_resourceE', 'size': 56, 'type': 'OBJECT'}
 {'is_defined': True, 'name': '_ZTVNSt3__13pmr26__null_memory_resource_impE', 'size': 56, 'type': 'OBJECT'}
 {'is_defined': True, 'name': '_ZTVNSt3__13pmr26synchronized_pool_resourceE', 'size': 56, 'type': 'OBJECT'}
diff --git a/libcxx/lib/abi/x86_64-unknown-linux-gnu.libcxxabi.v1.stable.noexceptions.nonew.abilist b/libcxx/lib/abi/x86_64-unknown-linux-gnu.libcxxabi.v1.stable.noexceptions.nonew.abilist
--- a/libcxx/lib/abi/x86_64-unknown-linux-gnu.libcxxabi.v1.stable.noexceptions.nonew.abilist
+++ b/libcxx/lib/abi/x86_64-unknown-linux-gnu.libcxxabi.v1.stable.noexceptions.nonew.abilist
@@ -1224,6 +1224,9 @@
 {'is_defined': True, 'name': '_ZNSt3__132__destroy_barrier_algorithm_baseEPNS_24__barrier_algorithm_baseE', 'type': 'FUNC'}
 {'is_defined': True, 'name': '_ZNSt3__134__construct_barrier_algorithm_baseERl', 'type': 'FUNC'}
 {'is_defined': True, 'name': '_ZNSt3__13cinE', 'size': 168, 'type': 'OBJECT'}
+{'is_defined': True, 'name': '_ZNSt3__13pmr15memory_resourceD0Ev', 'type': 'FUNC'}
+{'is_defined': True, 'name': '_ZNSt3__13pmr15memory_resourceD1Ev', 'type': 'FUNC'}
+{'is_defined': True, 'name': '_ZNSt3__13pmr15memory_resourceD2Ev', 'type': 'FUNC'}
 {'is_defined': True, 'name': '_ZNSt3__13pmr19new_delete_resourceEv', 'type': 'FUNC'}
 {'is_defined': True, 'name': '_ZNSt3__13pmr20get_default_resourceEv', 'type': 'FUNC'}
 {'is_defined': True, 'name': '_ZNSt3__13pmr20null_memory_resourceEv', 'type': 'FUNC'}
@@ -1956,6 +1959,7 @@
 {'is_defined': True, 'name': '_ZTVNSt3__120__codecvt_utf8_utf16IDiEE', 'size': 96, 'type': 'OBJECT'}
 {'is_defined': True, 'name': '_ZTVNSt3__120__codecvt_utf8_utf16IDsEE', 'size': 96, 'type': 'OBJECT'}
 {'is_defined': True, 'name': '_ZTVNSt3__120__codecvt_utf8_utf16IwEE', 'size': 96, 'type': 'OBJECT'}
+{'is_defined': True, 'name': '_ZTVNSt3__13pmr15memory_resourceE', 'size': 56, 'type': 'OBJECT'}
 {'is_defined': True, 'name': '_ZTVNSt3__13pmr25monotonic_buffer_resourceE', 'size': 56, 'type': 'OBJECT'}
 {'is_defined': True, 'name': '_ZTVNSt3__13pmr26__null_memory_resource_impE', 'size': 56, 'type': 'OBJECT'}
 {'is_defined': True, 'name': '_ZTVNSt3__13pmr26synchronized_pool_resourceE', 'size': 56, 'type': 'OBJECT'}
diff --git a/libcxx/src/memory_resource.cpp b/libcxx/src/memory_resource.cpp
--- a/libcxx/src/memory_resource.cpp
+++ b/libcxx/src/memory_resource.cpp
@@ -24,7 +24,7 @@
 
 // memory_resource
 
-//memory_resource::~memory_resource() {}
+memory_resource::~memory_resource() = default;
 
 // new_delete_resource()
 
diff --git a/libcxx/test/libcxx/utilities/utility/mem.res/mem.poly.allocator.class/mem.poly.allocator.mem/construct_piecewise_pair.pass.cpp b/libcxx/test/libcxx/utilities/utility/mem.res/mem.poly.allocator.class/mem.poly.allocator.mem/construct_piecewise_pair.pass.cpp
--- a/libcxx/test/libcxx/utilities/utility/mem.res/mem.poly.allocator.class/mem.poly.allocator.mem/construct_piecewise_pair.pass.cpp
+++ b/libcxx/test/libcxx/utilities/utility/mem.res/mem.poly.allocator.class/mem.poly.allocator.mem/construct_piecewise_pair.pass.cpp
@@ -7,6 +7,8 @@
 //===----------------------------------------------------------------------===//
 
 // UNSUPPORTED: c++03, c++11, c++14
+// XFAIL: use_system_cxx_lib && target={{.+}}-apple-macosx10.{{9|10|11|12|13|14|15}}
+// XFAIL: use_system_cxx_lib && target={{.+}}-apple-macosx{{11.0|12.0}}
 
 // test_memory_resource requires RTTI for dynamic_cast
 // UNSUPPORTED: no-rtti
diff --git a/libcxx/test/std/utilities/utility/mem.res/mem.poly.allocator.class/mem.poly.allocator.ctor/memory_resource_convert.pass.cpp b/libcxx/test/std/utilities/utility/mem.res/mem.poly.allocator.class/mem.poly.allocator.ctor/memory_resource_convert.pass.cpp
--- a/libcxx/test/std/utilities/utility/mem.res/mem.poly.allocator.class/mem.poly.allocator.ctor/memory_resource_convert.pass.cpp
+++ b/libcxx/test/std/utilities/utility/mem.res/mem.poly.allocator.class/mem.poly.allocator.ctor/memory_resource_convert.pass.cpp
@@ -7,6 +7,8 @@
 //===----------------------------------------------------------------------===//
 
 // UNSUPPORTED: c++03, c++11, c++14
+// XFAIL: use_system_cxx_lib && target={{.+}}-apple-macosx10.{{9|10|11|12|13|14|15}}
+// XFAIL: use_system_cxx_lib && target={{.+}}-apple-macosx{{11.0|12.0}}
 
 // test_memory_resource requires RTTI for dynamic_cast
 // UNSUPPORTED: no-rtti
diff --git a/libcxx/test/std/utilities/utility/mem.res/mem.res/mem.res.eq/equal.pass.cpp b/libcxx/test/std/utilities/utility/mem.res/mem.res/mem.res.eq/equal.pass.cpp
--- a/libcxx/test/std/utilities/utility/mem.res/mem.res/mem.res.eq/equal.pass.cpp
+++ b/libcxx/test/std/utilities/utility/mem.res/mem.res/mem.res.eq/equal.pass.cpp
@@ -7,6 +7,8 @@
 //===----------------------------------------------------------------------===//
 
 // UNSUPPORTED: c++03, c++11, c++14
+// XFAIL: use_system_cxx_lib && target={{.+}}-apple-macosx10.{{9|10|11|12|13|14|15}}
+// XFAIL: use_system_cxx_lib && target={{.+}}-apple-macosx{{11.0|12.0}}
 
 // test_memory_resource requires RTTI for dynamic_cast
 // UNSUPPORTED: no-rtti
diff --git a/libcxx/test/std/utilities/utility/mem.res/mem.res/mem.res.eq/not_equal.pass.cpp b/libcxx/test/std/utilities/utility/mem.res/mem.res/mem.res.eq/not_equal.pass.cpp
--- a/libcxx/test/std/utilities/utility/mem.res/mem.res/mem.res.eq/not_equal.pass.cpp
+++ b/libcxx/test/std/utilities/utility/mem.res/mem.res/mem.res.eq/not_equal.pass.cpp
@@ -7,6 +7,8 @@
 //===----------------------------------------------------------------------===//
 
 // UNSUPPORTED: c++03, c++11, c++14
+// XFAIL: use_system_cxx_lib && target={{.+}}-apple-macosx10.{{9|10|11|12|13|14|15}}
+// XFAIL: use_system_cxx_lib && target={{.+}}-apple-macosx{{11.0|12.0}}
 
 // test_memory_resource requires RTTI for dynamic_cast
 // UNSUPPORTED: no-rtti
diff --git a/libcxx/test/std/utilities/utility/mem.res/mem.res/mem.res.public/allocate.pass.cpp b/libcxx/test/std/utilities/utility/mem.res/mem.res/mem.res.public/allocate.pass.cpp
--- a/libcxx/test/std/utilities/utility/mem.res/mem.res/mem.res.public/allocate.pass.cpp
+++ b/libcxx/test/std/utilities/utility/mem.res/mem.res/mem.res.public/allocate.pass.cpp
@@ -7,6 +7,8 @@
 //===----------------------------------------------------------------------===//
 
 // UNSUPPORTED: c++03, c++11, c++14
+// XFAIL: use_system_cxx_lib && target={{.+}}-apple-macosx10.{{9|10|11|12|13|14|15}}
+// XFAIL: use_system_cxx_lib && target={{.+}}-apple-macosx{{11.0|12.0}}
 
 // test_memory_resource requires RTTI for dynamic_cast
 // UNSUPPORTED: no-rtti
diff --git a/libcxx/test/std/utilities/utility/mem.res/mem.res/mem.res.public/deallocate.pass.cpp b/libcxx/test/std/utilities/utility/mem.res/mem.res/mem.res.public/deallocate.pass.cpp
--- a/libcxx/test/std/utilities/utility/mem.res/mem.res/mem.res.public/deallocate.pass.cpp
+++ b/libcxx/test/std/utilities/utility/mem.res/mem.res/mem.res.public/deallocate.pass.cpp
@@ -7,6 +7,8 @@
 //===----------------------------------------------------------------------===//
 
 // UNSUPPORTED: c++03, c++11, c++14
+// XFAIL: use_system_cxx_lib && target={{.+}}-apple-macosx10.{{9|10|11|12|13|14|15}}
+// XFAIL: use_system_cxx_lib && target={{.+}}-apple-macosx{{11.0|12.0}}
 
 // test_memory_resource requires RTTI for dynamic_cast
 // UNSUPPORTED: no-rtti
diff --git a/libcxx/test/std/utilities/utility/mem.res/mem.res/mem.res.public/dtor.pass.cpp b/libcxx/test/std/utilities/utility/mem.res/mem.res/mem.res.public/dtor.pass.cpp
--- a/libcxx/test/std/utilities/utility/mem.res/mem.res/mem.res.public/dtor.pass.cpp
+++ b/libcxx/test/std/utilities/utility/mem.res/mem.res/mem.res.public/dtor.pass.cpp
@@ -7,6 +7,8 @@
 //===----------------------------------------------------------------------===//
 
 // UNSUPPORTED: c++03, c++11, c++14
+// XFAIL: use_system_cxx_lib && target={{.+}}-apple-macosx10.{{9|10|11|12|13|14|15}}
+// XFAIL: use_system_cxx_lib && target={{.+}}-apple-macosx{{11.0|12.0}}
 
 // test_memory_resource requires RTTI for dynamic_cast
 // UNSUPPORTED: no-rtti
diff --git a/libcxx/test/std/utilities/utility/mem.res/mem.res/mem.res.public/is_equal.pass.cpp b/libcxx/test/std/utilities/utility/mem.res/mem.res/mem.res.public/is_equal.pass.cpp
--- a/libcxx/test/std/utilities/utility/mem.res/mem.res/mem.res.public/is_equal.pass.cpp
+++ b/libcxx/test/std/utilities/utility/mem.res/mem.res/mem.res.public/is_equal.pass.cpp
@@ -7,6 +7,8 @@
 //===----------------------------------------------------------------------===//
 
 // UNSUPPORTED: c++03, c++11, c++14
+// XFAIL: use_system_cxx_lib && target={{.+}}-apple-macosx10.{{9|10|11|12|13|14|15}}
+// XFAIL: use_system_cxx_lib && target={{.+}}-apple-macosx{{11.0|12.0}}
 
 // test_memory_resource requires RTTI for dynamic_cast
 // UNSUPPORTED: no-rtti