Index: include/atomic
===================================================================
--- include/atomic
+++ include/atomic
@@ -539,7 +539,7 @@
 
 _LIBCPP_BEGIN_NAMESPACE_STD
 
-#if !__has_feature(cxx_atomic) && _GNUC_VER < 407
+#if !__has_extension(c_atomic) && _GNUC_VER < 407
 #error <atomic> is not implemented
 #else
 
@@ -1763,8 +1763,10 @@
 typedef atomic<intmax_t>  atomic_intmax_t;
 typedef atomic<uintmax_t> atomic_uintmax_t;
 
-#define ATOMIC_FLAG_INIT {false}
-#define ATOMIC_VAR_INIT(__v) {__v}
+#if __cplusplus >= 201103L
+#  define ATOMIC_FLAG_INIT {false}
+#  define ATOMIC_VAR_INIT(__v) {__v}
+#endif
 
 // lock-free property
 
Index: test/atomics/atomics.flag/init.pass.cpp
===================================================================
--- test/atomics/atomics.flag/init.pass.cpp
+++ test/atomics/atomics.flag/init.pass.cpp
@@ -9,6 +9,9 @@
 //
 // UNSUPPORTED: libcpp-has-no-threads
 
+// NOTE: ATOMIC_FLAG_INIT is only defined for c++ >= 11
+// XFAIL: c++98, c++03
+
 // <atomic>
 
 // struct atomic_flag
Index: test/atomics/atomics.types.operations/atomics.types.operations.req/atomic_compare_exchange_strong.pass.cpp
===================================================================
--- test/atomics/atomics.types.operations/atomics.types.operations.req/atomic_compare_exchange_strong.pass.cpp
+++ test/atomics/atomics.types.operations/atomics.types.operations.req/atomic_compare_exchange_strong.pass.cpp
@@ -58,7 +58,7 @@
 {
     int i;
 
-    explicit A(int d = 0) noexcept {i=d;}
+    explicit A(int d = 0) _NOEXCEPT {i=d;}
 
     friend bool operator==(const A& x, const A& y)
         {return x.i == y.i;}
Index: test/atomics/atomics.types.operations/atomics.types.operations.req/atomic_compare_exchange_strong_explicit.pass.cpp
===================================================================
--- test/atomics/atomics.types.operations/atomics.types.operations.req/atomic_compare_exchange_strong_explicit.pass.cpp
+++ test/atomics/atomics.types.operations/atomics.types.operations.req/atomic_compare_exchange_strong_explicit.pass.cpp
@@ -65,7 +65,7 @@
 {
     int i;
 
-    explicit A(int d = 0) noexcept {i=d;}
+    explicit A(int d = 0) _NOEXCEPT {i=d;}
 
     friend bool operator==(const A& x, const A& y)
         {return x.i == y.i;}
Index: test/atomics/atomics.types.operations/atomics.types.operations.req/atomic_compare_exchange_weak.pass.cpp
===================================================================
--- test/atomics/atomics.types.operations/atomics.types.operations.req/atomic_compare_exchange_weak.pass.cpp
+++ test/atomics/atomics.types.operations/atomics.types.operations.req/atomic_compare_exchange_weak.pass.cpp
@@ -60,7 +60,7 @@
 {
     int i;
 
-    explicit A(int d = 0) noexcept {i=d;}
+    explicit A(int d = 0) _NOEXCEPT {i=d;}
 
     friend bool operator==(const A& x, const A& y)
         {return x.i == y.i;}
Index: test/atomics/atomics.types.operations/atomics.types.operations.req/atomic_compare_exchange_weak_explicit.pass.cpp
===================================================================
--- test/atomics/atomics.types.operations/atomics.types.operations.req/atomic_compare_exchange_weak_explicit.pass.cpp
+++ test/atomics/atomics.types.operations/atomics.types.operations.req/atomic_compare_exchange_weak_explicit.pass.cpp
@@ -67,7 +67,7 @@
 {
     int i;
 
-    explicit A(int d = 0) noexcept {i=d;}
+    explicit A(int d = 0) _NOEXCEPT {i=d;}
 
     friend bool operator==(const A& x, const A& y)
         {return x.i == y.i;}
Index: test/atomics/atomics.types.operations/atomics.types.operations.req/atomic_exchange.pass.cpp
===================================================================
--- test/atomics/atomics.types.operations/atomics.types.operations.req/atomic_exchange.pass.cpp
+++ test/atomics/atomics.types.operations/atomics.types.operations.req/atomic_exchange.pass.cpp
@@ -43,7 +43,7 @@
 {
     int i;
 
-    explicit A(int d = 0) noexcept {i=d;}
+    explicit A(int d = 0) _NOEXCEPT {i=d;}
 
     friend bool operator==(const A& x, const A& y)
         {return x.i == y.i;}
Index: test/atomics/atomics.types.operations/atomics.types.operations.req/atomic_exchange_explicit.pass.cpp
===================================================================
--- test/atomics/atomics.types.operations/atomics.types.operations.req/atomic_exchange_explicit.pass.cpp
+++ test/atomics/atomics.types.operations/atomics.types.operations.req/atomic_exchange_explicit.pass.cpp
@@ -45,7 +45,7 @@
 {
     int i;
 
-    explicit A(int d = 0) noexcept {i=d;}
+    explicit A(int d = 0) _NOEXCEPT {i=d;}
 
     friend bool operator==(const A& x, const A& y)
         {return x.i == y.i;}
Index: test/atomics/atomics.types.operations/atomics.types.operations.req/atomic_fetch_add.pass.cpp
===================================================================
--- test/atomics/atomics.types.operations/atomics.types.operations.req/atomic_fetch_add.pass.cpp
+++ test/atomics/atomics.types.operations/atomics.types.operations.req/atomic_fetch_add.pass.cpp
@@ -78,7 +78,7 @@
 {
     int i;
 
-    explicit A(int d = 0) noexcept {i=d;}
+    explicit A(int d = 0) _NOEXCEPT {i=d;}
     A(const A& a) : i(a.i) {}
     A(const volatile A& a) : i(a.i) {}
 
Index: test/atomics/atomics.types.operations/atomics.types.operations.req/atomic_fetch_add_explicit.pass.cpp
===================================================================
--- test/atomics/atomics.types.operations/atomics.types.operations.req/atomic_fetch_add_explicit.pass.cpp
+++ test/atomics/atomics.types.operations/atomics.types.operations.req/atomic_fetch_add_explicit.pass.cpp
@@ -82,7 +82,7 @@
 {
     int i;
 
-    explicit A(int d = 0) noexcept {i=d;}
+    explicit A(int d = 0) _NOEXCEPT {i=d;}
     A(const A& a) : i(a.i) {}
     A(const volatile A& a) : i(a.i) {}
 
Index: test/atomics/atomics.types.operations/atomics.types.operations.req/atomic_fetch_sub.pass.cpp
===================================================================
--- test/atomics/atomics.types.operations/atomics.types.operations.req/atomic_fetch_sub.pass.cpp
+++ test/atomics/atomics.types.operations/atomics.types.operations.req/atomic_fetch_sub.pass.cpp
@@ -78,7 +78,7 @@
 {
     int i;
 
-    explicit A(int d = 0) noexcept {i=d;}
+    explicit A(int d = 0) _NOEXCEPT {i=d;}
     A(const A& a) : i(a.i) {}
     A(const volatile A& a) : i(a.i) {}
 
Index: test/atomics/atomics.types.operations/atomics.types.operations.req/atomic_fetch_sub_explicit.pass.cpp
===================================================================
--- test/atomics/atomics.types.operations/atomics.types.operations.req/atomic_fetch_sub_explicit.pass.cpp
+++ test/atomics/atomics.types.operations/atomics.types.operations.req/atomic_fetch_sub_explicit.pass.cpp
@@ -83,7 +83,7 @@
 {
     int i;
 
-    explicit A(int d = 0) noexcept {i=d;}
+    explicit A(int d = 0) _NOEXCEPT {i=d;}
     A(const A& a) : i(a.i) {}
     A(const volatile A& a) : i(a.i) {}
 
Index: test/atomics/atomics.types.operations/atomics.types.operations.req/atomic_init.pass.cpp
===================================================================
--- test/atomics/atomics.types.operations/atomics.types.operations.req/atomic_init.pass.cpp
+++ test/atomics/atomics.types.operations/atomics.types.operations.req/atomic_init.pass.cpp
@@ -41,7 +41,7 @@
 {
     int i;
 
-    explicit A(int d = 0) noexcept {i=d;}
+    explicit A(int d = 0) _NOEXCEPT {i=d;}
 
     friend bool operator==(const A& x, const A& y)
         {return x.i == y.i;}
Index: test/atomics/atomics.types.operations/atomics.types.operations.req/atomic_load.pass.cpp
===================================================================
--- test/atomics/atomics.types.operations/atomics.types.operations.req/atomic_load.pass.cpp
+++ test/atomics/atomics.types.operations/atomics.types.operations.req/atomic_load.pass.cpp
@@ -41,7 +41,7 @@
 {
     int i;
 
-    explicit A(int d = 0) noexcept {i=d;}
+    explicit A(int d = 0) _NOEXCEPT {i=d;}
 
     friend bool operator==(const A& x, const A& y)
         {return x.i == y.i;}
Index: test/atomics/atomics.types.operations/atomics.types.operations.req/atomic_load_explicit.pass.cpp
===================================================================
--- test/atomics/atomics.types.operations/atomics.types.operations.req/atomic_load_explicit.pass.cpp
+++ test/atomics/atomics.types.operations/atomics.types.operations.req/atomic_load_explicit.pass.cpp
@@ -41,7 +41,7 @@
 {
     int i;
 
-    explicit A(int d = 0) noexcept {i=d;}
+    explicit A(int d = 0) _NOEXCEPT {i=d;}
 
     friend bool operator==(const A& x, const A& y)
         {return x.i == y.i;}
Index: test/atomics/atomics.types.operations/atomics.types.operations.req/atomic_store.pass.cpp
===================================================================
--- test/atomics/atomics.types.operations/atomics.types.operations.req/atomic_store.pass.cpp
+++ test/atomics/atomics.types.operations/atomics.types.operations.req/atomic_store.pass.cpp
@@ -41,7 +41,7 @@
 {
     int i;
 
-    explicit A(int d = 0) noexcept {i=d;}
+    explicit A(int d = 0) _NOEXCEPT {i=d;}
 
     friend bool operator==(const A& x, const A& y)
         {return x.i == y.i;}
Index: test/atomics/atomics.types.operations/atomics.types.operations.req/atomic_store_explicit.pass.cpp
===================================================================
--- test/atomics/atomics.types.operations/atomics.types.operations.req/atomic_store_explicit.pass.cpp
+++ test/atomics/atomics.types.operations/atomics.types.operations.req/atomic_store_explicit.pass.cpp
@@ -41,7 +41,7 @@
 {
     int i;
 
-    explicit A(int d = 0) noexcept {i=d;}
+    explicit A(int d = 0) _NOEXCEPT {i=d;}
 
     friend bool operator==(const A& x, const A& y)
         {return x.i == y.i;}
Index: test/atomics/atomics.types.operations/atomics.types.operations.req/atomic_var_init.pass.cpp
===================================================================
--- test/atomics/atomics.types.operations/atomics.types.operations.req/atomic_var_init.pass.cpp
+++ test/atomics/atomics.types.operations/atomics.types.operations.req/atomic_var_init.pass.cpp
@@ -9,6 +9,9 @@
 //
 // UNSUPPORTED: libcpp-has-no-threads
 
+// NOTE: ATOMIC_VAR_INIT is only defined for c++ >= 11
+// XFAIL: c++98, c++03
+
 // <atomic>
 
 // #define ATOMIC_VAR_INIT(value)