8310863: Build failure after JDK- 8305341

Reviewed-by: dholmes

Author: TheShermanTanker

src/java.prefs/windows/native/libprefs/WindowsPreferences.c

@@ -23,7 +23,6 @@
  * questions.
  */
 
-#include <stdalign.h>
 #include <stdlib.h>
 #include <windows.h>
 #include "jni.h"
@@ -50,7 +49,7 @@ Java_java_util_prefs_WindowsPreferences_WindowsRegOpenKey(JNIEnv* env,
     int errorCode = RegOpenKeyEx((HKEY) hKey, str, 0, securityMask, &handle);
     (*env)->ReleaseByteArrayElements(env, lpSubKey, str, 0);
 
-    alignas(8) jlong tmp[2];
+    _Alignas(8) jlong tmp[2];
     tmp[0] = (jlong) handle;
     tmp[1] = errorCode;
     jlongArray result = (*env)->NewLongArray(env, 2);
@@ -79,7 +78,7 @@ Java_java_util_prefs_WindowsPreferences_WindowsRegCreateKeyEx(JNIEnv* env,
         NULL, &handle, &lpdwDisposition);
     (*env)->ReleaseByteArrayElements(env, lpSubKey, str, 0);
 
-    alignas(8) jlong tmp[3];
+    _Alignas(8) jlong tmp[3];
     tmp[0] = (jlong) handle;
     tmp[1] = errorCode;
     tmp[2] = lpdwDisposition;
@@ -197,7 +196,7 @@ Java_java_util_prefs_WindowsPreferences_WindowsRegQueryInfoKey(JNIEnv* env,
         &valuesNumber, &maxValueNameLength,
         NULL, NULL, NULL);
 
-    alignas(8) jlong tmp[5];
+    _Alignas(8) jlong tmp[5];
     tmp[0] = subKeysNumber;
     tmp[1] = errorCode;
     tmp[2] = valuesNumber;

src/java.security.jgss/share/native/libj2gss/GSSLibStub.c

@@ -23,8 +23,6 @@
  * questions.
  */
 
-#include <stdalign.h>
-
 #include "sun_security_jgss_wrapper_GSSLibStub.h"
 #include "NativeUtil.h"
 #include "NativeFunc.h"
@@ -1191,7 +1189,7 @@ Java_sun_security_jgss_wrapper_GSSLibStub_inquireContext(JNIEnv *env,
   OM_uint32 flags;
   int isInitiator, isEstablished;
 #if defined (_WIN32) && defined (_MSC_VER)
-  alignas(8)
+  _Alignas(8)
 #endif
   jlong result[6];
   jlongArray jresult;

src/jdk.jdwp.agent/share/native/libjdwp/ArrayReferenceImpl.c

@@ -23,8 +23,6 @@
  * questions.
  */
 
-#include <stdalign.h>
-
 #include "util.h"
 #include "ArrayReferenceImpl.h"
 #include "inStream.h"
@@ -418,7 +416,7 @@ readLongComponents(JNIEnv *env, PacketInputStream *in,
 {
     int i;
 #if defined (_WIN32) && defined (_MSC_VER)
-    alignas(8)
+    _Alignas(8)
 #endif
     jlong component;
 
@@ -449,7 +447,7 @@ readDoubleComponents(JNIEnv *env, PacketInputStream *in,
 {
     int i;
 #if defined (_WIN32) && defined (_MSC_VER)
-    alignas(8)
+    _Alignas(8)
 #endif
     jdouble component;