RFR (XS) 8221824: Build failure with MSVS 2013 after JDK-8218418

[Aleksey Shipilev]

Bug:
 https://bugs.openjdk.java.net/browse/JDK-8221824

I understand Oracle is building with newer MSVS. I would like to still maintain the code buildable
with older MSVS-es.

Fix:

diff -r 35794e8db61b src/java.base/windows/native/libnio/fs/WindowsNativeDispatcher.c
--- a/src/java.base/windows/native/libnio/fs/WindowsNativeDispatcher.c  Tue Apr 02 10:04:35 2019 +0200
+++ b/src/java.base/windows/native/libnio/fs/WindowsNativeDispatcher.c  Tue Apr 02 13:56:19 2019 +0200
@@ -1066,6 +1066,9 @@
     // Allow creation of symbolic links when the process is not elevated.
     // Developer Mode must be enabled for this option to function, otherwise
-    // it will be ignored.
-    DWORD dwFlags = (DWORD)flags | SYMBOLIC_LINK_FLAG_ALLOW_UNPRIVILEGED_CREATE;
+    // it will be ignored. Check that symbol is available in current build SDK.
+    DWORD dwFlags = (DWORD)flags;
+#ifdef SYMBOLIC_LINK_FLAG_ALLOW_UNPRIVILEGED_CREATE
+    dwFlags |= SYMBOLIC_LINK_FLAG_ALLOW_UNPRIVILEGED_CREATE;
+#endif

     // On Windows 64-bit this appears to succeed even when there are

Testing: local Windows build, jdk-submit (running)

-- 
Thanks,
-Aleksey


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