Index: include/valarray
===================================================================
--- include/valarray
+++ include/valarray
@@ -1059,8 +1059,6 @@
     valarray& __assign_range(const value_type* __f, const value_type* __l);
 };
 
-_LIBCPP_EXTERN_TEMPLATE(_LIBCPP_FUNC_VIS valarray<size_t>::valarray(size_t))
-_LIBCPP_EXTERN_TEMPLATE(_LIBCPP_FUNC_VIS valarray<size_t>::~valarray())
 _LIBCPP_EXTERN_TEMPLATE(_LIBCPP_FUNC_VIS void valarray<size_t>::resize(size_t, size_t))
 
 template <class _Op, class _Tp>
Index: lib/abi/x86_64-apple-darwin.v2.abilist
===================================================================
--- lib/abi/x86_64-apple-darwin.v2.abilist
+++ lib/abi/x86_64-apple-darwin.v2.abilist
@@ -1380,10 +1380,6 @@
 {'is_defined': True, 'name': '__ZNSt3__28time_putIcNS_19ostreambuf_iteratorIcNS_11char_traitsIcEEEEE2idE', 'size': 0, 'type': 'OBJECT'}
 {'is_defined': True, 'name': '__ZNSt3__28time_putIwNS_19ostreambuf_iteratorIwNS_11char_traitsIwEEEEE2idE', 'size': 0, 'type': 'OBJECT'}
 {'is_defined': True, 'name': '__ZNSt3__28valarrayImE6resizeEmm', 'type': 'FUNC'}
-{'is_defined': True, 'name': '__ZNSt3__28valarrayImEC1Em', 'type': 'FUNC'}
-{'is_defined': True, 'name': '__ZNSt3__28valarrayImEC2Em', 'type': 'FUNC'}
-{'is_defined': True, 'name': '__ZNSt3__28valarrayImED1Ev', 'type': 'FUNC'}
-{'is_defined': True, 'name': '__ZNSt3__28valarrayImED2Ev', 'type': 'FUNC'}
 {'is_defined': True, 'name': '__ZNSt3__29__num_getIcE17__stage2_int_loopEciPcRS2_RjcRKNS_12basic_stringIcNS_11char_traitsIcEENS_9allocatorIcEEEEPjRSD_PKc', 'type': 'FUNC'}
 {'is_defined': True, 'name': '__ZNSt3__29__num_getIcE17__stage2_int_prepERNS_8ios_baseERc', 'type': 'FUNC'}
 {'is_defined': True, 'name': '__ZNSt3__29__num_getIcE19__stage2_float_loopEcRbRcPcRS4_ccRKNS_12basic_stringIcNS_11char_traitsIcEENS_9allocatorIcEEEEPjRSE_RjS4_', 'type': 'FUNC'}
Index: src/valarray.cpp
===================================================================
--- src/valarray.cpp
+++ src/valarray.cpp
@@ -10,8 +10,12 @@
 
 _LIBCPP_BEGIN_NAMESPACE_STD
 
+// These two symbols are part of the v1 ABI but not part of the >=v2 ABI.
+#if _LIBCPP_ABI_VERSION == 1
 template valarray<size_t>::valarray(size_t);
 template valarray<size_t>::~valarray();
+#endif
+
 template void valarray<size_t>::resize(size_t, size_t);
 
 void