6588413 changed JNIEXPORT visibility for GCC on HSX, jdk's jni_md.h needs similar change

This changeset:

http://hg.openjdk.java.net/jdk7/hotspot-rt/hotspot/rev/d70fe6ab4436

made this change (among others):

--- a/src/cpu/x86/vm/jni_x86.h Thu Jan 27 16:11:27 2011 -0800
+++ b/src/cpu/x86/vm/jni_x86.h Tue Feb 01 11:23:19 2011 -0500
@@ -27,10 +27,16 @@
#define _JAVASOFT_JNI_MD_H_
#if defined(SOLARIS) || defined(LINUX)
+
+#if defined(__GNUC__) && (__GNUC__ > 4) || (__GNUC__ == 4) && (__GNUC_MINOR__ > 2)
+ #define JNIEXPORT __attribute__((visibility("default")))
+ #define JNIIMPORT __attribute__((visibility("default")))
+#else
#define JNIEXPORT
#define JNIIMPORT
+#endif
+
#define JNICALL
-
typedef int jint;
#ifdef _LP64

The JDK repo contain the official version of the jni_md.h file that is included in
the distribution and it does not have this change:

$ hg annotate src/solaris/javavm/export/jni_md.h
   0: /*
2362: * Copyright (c) 1996, 2000, Oracle and/or its affiliates. All rights reserved.
   0: * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   0: *
   0: * This code is free software; you can redistribute it and/or modify it
   0: * under the terms of the GNU General Public License version 2 only, as
2362: * published by the Free Software Foundation. Oracle designates this
   0: * particular file as subject to the "Classpath" exception as provided
2362: * by Oracle in the LICENSE file that accompanied this code.
   0: *
   0: * This code is distributed in the hope that it will be useful, but WITHOUT
   0: * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
   0: * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
   0: * version 2 for more details (a copy is included in the LICENSE file that
   0: * accompanied this code).
   0: *
   0: * You should have received a copy of the GNU General Public License version
   0: * 2 along with this work; if not, write to the Free Software Foundation,
   0: * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
   0: *
2362: * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
2362: * or visit www.oracle.com if you need additional information or have any
2362: * questions.
   0: */
   0:
   0: #ifndef _JAVASOFT_JNI_MD_H_
   0: #define _JAVASOFT_JNI_MD_H_
   0:
   0: #define JNIEXPORT
   0: #define JNIIMPORT
   0: #define JNICALL
   0:
   0: typedef int jint;
   0: #ifdef _LP64 /* 64-bit Solaris */
   0: typedef long jlong;
   0: #else
   0: typedef long long jlong;
   0: #endif
   0:
   0: typedef signed char jbyte;
   0:
   0: #endif /* !_JAVASOFT_JNI_MD_H_ */


During the code review cycle for:

    6588413: Use -fvisibility=hidden for gcc compiles

the need for an update to the jdk repo's jni_md.h was brought up, but it looks
like that detail was dropped.