Update to support builtins where -fms-extensions is both enabled or disabled

mingw-w64-headers/include/psdk_inc/intrin-impl.h

diff --git a/mingw-w64-headers/include/psdk_inc/intrin-impl.h b/mingw-w64-headers/include/psdk_inc/intrin-impl.h
index 9645e24..6100290 100644
--- a/mingw-w64-headers/include/psdk_inc/intrin-impl.h
+++ b/mingw-w64-headers/include/psdk_inc/intrin-impl.h
@@ -80,6 +80,11 @@
 #define __FLAGCLOBBER2
 #endif
 
+/* Clang has support for MSVC builtins, GCC doesn't */
+#ifndef __has_builtin
+  #define __has_builtin(x) 0
+#endif
+
 /* This macro is used by __stosb, __stosw, __stosd, __stosq */
 
 /* Parameters: (FunctionName, DataType, Operator)
@@ -1015,7 +1020,7 @@
 
 #if __INTRINSIC_PROLOG(_InterlockedExchangeAdd)
 __LONG32 _InterlockedExchangeAdd(__LONG32 volatile *Addend, __LONG32 Value);
-#ifndef __clang__
+#if !__has_builtin(_InterlockedExchangeAdd)
 __INTRINSICS_USEINLINE 
 __LONG32 _InterlockedExchangeAdd(__LONG32 volatile *Addend, __LONG32 Value) {
     return __sync_fetch_and_add(Addend, Value);
@@ -1026,7 +1031,7 @@
 
 #if __INTRINSIC_PROLOG(_InterlockedCompareExchange)
 __LONG32 _InterlockedCompareExchange(__LONG32 volatile *Destination, __LONG32 ExChange, __LONG32 Comperand);
-#ifndef __clang__
+#if !__has_builtin(_InterlockedCompareExchange)
 __INTRINSICS_USEINLINE 
 __LONG32 _InterlockedCompareExchange(__LONG32 volatile *Destination, __LONG32 ExChange, __LONG32 Comperand) {
     return __sync_val_compare_and_swap(Destination, Comperand, ExChange);
@@ -1037,7 +1042,7 @@
 
 #if __INTRINSIC_PROLOG(_InterlockedIncrement)
 __LONG32 _InterlockedIncrement(__LONG32 volatile *Addend);
-#ifndef __clang__
+#if !__has_builtin(_InterlockedIncrement)
 __INTRINSICS_USEINLINE 
 __LONG32 _InterlockedIncrement(__LONG32 volatile *Addend) {
    return __sync_add_and_fetch(Addend, 1);
@@ -1048,7 +1053,7 @@
 
 #if __INTRINSIC_PROLOG(_InterlockedDecrement)
 __LONG32 _InterlockedDecrement(__LONG32 volatile *Addend);
-#ifndef __clang__
+#if !__has_builtin(_InterlockedDecrement)
 __INTRINSICS_USEINLINE 
 __LONG32 _InterlockedDecrement(__LONG32 volatile *Addend) {
    return __sync_sub_and_fetch(Addend, 1);
@@ -1077,7 +1082,7 @@
 
 #if __INTRINSIC_PROLOG(_InterlockedExchange)
 __LONG32 _InterlockedExchange(__LONG32 volatile *Target, __LONG32 Value);
-#ifndef __clang__
+#if !__has_builtin(_InterlockedExchange)
 __INTRINSICS_USEINLINE 
 __LONG32 _InterlockedExchange(__LONG32 volatile *Target, __LONG32 Value) {
     return __sync_lock_test_and_set(Target, Value);
@@ -1097,7 +1102,7 @@
 
 #if __INTRINSIC_PROLOG(_InterlockedCompareExchangePointer)
 void *_InterlockedCompareExchangePointer(void * volatile *Destination, void *ExChange, void *Comperand);
-#ifndef __clang__
+#if !__has_builtin(_InterlockedCompareExchangePointer)
 __INTRINSICS_USEINLINE 
 void *_InterlockedCompareExchangePointer(void *volatile *Destination, void *ExChange, void *Comperand) {
     return __sync_val_compare_and_swap(Destination, Comperand, ExChange);
@@ -1108,7 +1113,7 @@
 
 #if __INTRINSIC_PROLOG(_InterlockedExchangePointer)
 void *_InterlockedExchangePointer(void *volatile *Target,void *Value);
-#ifndef __clang__
+#if !__has_builtin(_InterlockedExchangePointer)
 __INTRINSICS_USEINLINE 
 void *_InterlockedExchangePointer(void *volatile *Target,void *Value) {
     return __sync_lock_test_and_set(Target, Value);