Fix build with Clang 11.

https://github.com/battleblow/openjdk-jdk12u/commit/9e8e504992f95cc36c6dcd6e6f57ac18b58e0db5
https://github.com/battleblow/openjdk-jdk12u/commit/c525150ace8816c503ccc618ea5559d06c99bbcb
https://github.com/battleblow/openjdk-jdk12u/commit/dc2d99a20d0eea8d79cb31960cb693b2a4a39a4b

PR:		250270

4 files changed, 113 insertions, 0 deletions

diff --git a/java/openjdk12/files/patch-changeset-57932 b/java/openjdk12/files/patch-changeset-57932
new file mode 100644
index 000000000000..12acff8b6c8d
--- /dev/null
+++ b/java/openjdk12/files/patch-changeset-57932
@@ -0,0 +1,44 @@
+changeset:   57932:9e54ea7d9cd9
+user:        qpzhang
+date:        Wed Feb 05 20:31:09 2020 +0800
+summary:     8238388: libj2gss/NativeFunc.o "multiple definition" link errors with GCC10
+
+diff -r 932418820c80 -r 9e54ea7d9cd9 src/java.security.jgss/share/native/libj2gss/NativeFunc.c
+--- src/java.security.jgss/share/native/libj2gss/NativeFunc.c	Wed Feb 05 10:45:39 2020 +0100
++++ src/java.security.jgss/share/native/libj2gss/NativeFunc.c	Wed Feb 05 20:31:09 2020 +0800
+@@ -1,5 +1,5 @@
+ /*
+- * Copyright (c) 2005, 2018, Oracle and/or its affiliates. All rights reserved.
++ * Copyright (c) 2005, 2020, Oracle and/or its affiliates. All rights reserved.
+  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+  *
+  * This code is free software; you can redistribute it and/or modify it
+@@ -27,6 +27,9 @@
+ #include <stdlib.h>
+ #include "NativeFunc.h"
+ 
++/* global GSS function table */
++GSS_FUNCTION_TABLE_PTR ftab;
++
+ /* standard GSS method names (ordering is from mapfile) */
+ static const char RELEASE_NAME[]                = "gss_release_name";
+ static const char IMPORT_NAME[]                 = "gss_import_name";
+diff -r 932418820c80 -r 9e54ea7d9cd9 src/java.security.jgss/share/native/libj2gss/NativeFunc.h
+--- src/java.security.jgss/share/native/libj2gss/NativeFunc.h	Wed Feb 05 10:45:39 2020 +0100
++++ src/java.security.jgss/share/native/libj2gss/NativeFunc.h	Wed Feb 05 20:31:09 2020 +0800
+@@ -1,5 +1,5 @@
+ /*
+- * Copyright (c) 2005, 2018, Oracle and/or its affiliates. All rights reserved.
++ * Copyright (c) 2005, 2020, Oracle and/or its affiliates. All rights reserved.
+  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+  *
+  * This code is free software; you can redistribute it and/or modify it
+@@ -277,6 +277,6 @@
+ typedef GSS_FUNCTION_TABLE *GSS_FUNCTION_TABLE_PTR;
+ 
+ /* global GSS function table */
+-GSS_FUNCTION_TABLE_PTR ftab;
++extern GSS_FUNCTION_TABLE_PTR ftab;
+ 
+ #endif
+
diff --git a/java/openjdk12/files/patch-changeset-57994 b/java/openjdk12/files/patch-changeset-57994
new file mode 100644
index 000000000000..8e6dc348c532
--- /dev/null
+++ b/java/openjdk12/files/patch-changeset-57994
@@ -0,0 +1,43 @@
+changeset:   57994:6925fca95959
+user:        qpzhang
+date:        Tue Feb 04 21:27:10 2020 +0800
+summary:     8238380: java.base/unix/native/libjava/childproc.c "multiple definition" link errors with GCC10
+
+diff -r 8f6ffa575f63 -r 6925fca95959 src/java.base/unix/native/libjava/childproc.c
+--- src/java.base/unix/native/libjava/childproc.c	Tue Feb 11 11:17:37 2020 +0800
++++ src/java.base/unix/native/libjava/childproc.c	Tue Feb 04 21:27:10 2020 +0800
+@@ -1,5 +1,5 @@
+ /*
+- * Copyright (c) 2013, 2018, Oracle and/or its affiliates. All rights reserved.
++ * Copyright (c) 2013, 2020, Oracle and/or its affiliates. All rights reserved.
+  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+  *
+  * This code is free software; you can redistribute it and/or modify it
+@@ -34,6 +34,7 @@
+ 
+ #include "childproc.h"
+ 
++const char * const *parentPathv;
+ 
+ ssize_t
+ restartableWrite(int fd, const void *buf, size_t count)
+diff -r 8f6ffa575f63 -r 6925fca95959 src/java.base/unix/native/libjava/childproc.h
+--- src/java.base/unix/native/libjava/childproc.h	Tue Feb 11 11:17:37 2020 +0800
++++ src/java.base/unix/native/libjava/childproc.h	Tue Feb 04 21:27:10 2020 +0800
+@@ -1,5 +1,5 @@
+ /*
+- * Copyright (c) 2013, 2015, Oracle and/or its affiliates. All rights reserved.
++ * Copyright (c) 2013, 2020, Oracle and/or its affiliates. All rights reserved.
+  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+  *
+  * This code is free software; you can redistribute it and/or modify it
+@@ -126,7 +126,7 @@
+  * The cached and split version of the JDK's effective PATH.
+  * (We don't support putenv("PATH=...") in native code)
+  */
+-const char * const *parentPathv;
++extern const char * const *parentPathv;
+ 
+ ssize_t restartableWrite(int fd, const void *buf, size_t count);
+ int restartableDup2(int fd_from, int fd_to);
+
diff --git a/java/openjdk12/files/patch-src_java.desktop_unix_classes_sun_awt_X11_XlibWrapper.java b/java/openjdk12/files/patch-src_java.desktop_unix_classes_sun_awt_X11_XlibWrapper.java
new file mode 100644
index 000000000000..4f3913a95410
--- /dev/null
+++ b/java/openjdk12/files/patch-src_java.desktop_unix_classes_sun_awt_X11_XlibWrapper.java
@@ -0,0 +1,11 @@
+--- src/java.desktop/unix/classes/sun/awt/X11/XlibWrapper.java.orig	2020-04-17 22:35:42 UTC
++++ src/java.desktop/unix/classes/sun/awt/X11/XlibWrapper.java
+@@ -529,7 +529,7 @@ static native String XSetLocaleModifiers(String modifi
+           display   Specifies the connection to the X server.
+           onoff     Specifies a Boolean value that indicates whether to enable or disable synchronization.
+      */
+-    static native int XSynchronize(long display, boolean onoff);
++    static native long XSynchronize(long display, boolean onoff);
+ 
+     /**
+      * Extracts an X event that can be processed in a secondary loop.
diff --git a/java/openjdk12/files/patch-src_java.desktop_unix_native_libawt__xawt_xawt_XlibWrapper.c b/java/openjdk12/files/patch-src_java.desktop_unix_native_libawt__xawt_xawt_XlibWrapper.c
new file mode 100644
index 000000000000..b4d602993ab9
--- /dev/null
+++ b/java/openjdk12/files/patch-src_java.desktop_unix_native_libawt__xawt_xawt_XlibWrapper.c
@@ -0,0 +1,15 @@
+--- src/java.desktop/unix/native/libawt_xawt/xawt/XlibWrapper.c.orig	2020-04-17 22:35:42 UTC
++++ src/java.desktop/unix/native/libawt_xawt/xawt/XlibWrapper.c
+@@ -2180,10 +2180,10 @@ Java_sun_awt_X11_XlibWrapper_copyLongArray(JNIEnv *env
+     }
+ }
+ 
+-JNIEXPORT jint JNICALL
++JNIEXPORT jlong JNICALL
+ Java_sun_awt_X11_XlibWrapper_XSynchronize(JNIEnv *env, jclass clazz, jlong display, jboolean onoff)
+ {
+-    return (jint) XSynchronize((Display*)jlong_to_ptr(display), (onoff == JNI_TRUE ? True : False));
++    return ptr_to_jlong(XSynchronize((Display*)jlong_to_ptr(display), (onoff == JNI_TRUE ? True : False)));
+ }
+ 
+ JNIEXPORT jboolean JNICALL