Merge pull request #1067 from matthiasblaesing/openjdk_aix_1066

Use correct native library on OpenJDK on AIX

CHANGES.md

@@ -16,6 +16,7 @@ Bug Fixes
 ---------
 * [#1052](https://github.com/java-native-access/jna/pull/1052), [#1053](https://github.com/java-native-access/jna/issues/1053): WinXP compatibility for `c.s.j.p.win32.PdhUtil` - [@dbwiddis](https://github.com/dbwiddis).
 * [#1055](https://github.com/java-native-access/jna/pull/1055): Include `c.s.j.p.linux` in OSGi bundle. - [@dbwiddis](https://github.com/dbwiddis).
+* [#1066](https://github.com/java-native-access/jna/issues/1066): On AIX OpenJDK differs from IBM J9 in the mapping of library names. While J9 maps jnidispatch to `libjnidispatch.a`, OpenJDK maps to `libjnidispatch.so`, which causes the native library extractor to fail. AIX is now hard-coded to `libjnidispatch.a` - [@matthiasblaesing](https://github.com/matthiasblaesing).
 
 Release 5.2.0
 =============

src/com/sun/jna/Native.java

@@ -999,7 +999,13 @@ private static void loadNativeDispatchLibrary() {
      */
     private static void loadNativeDispatchLibraryFromClasspath() {
         try {
-            String libName = "/com/sun/jna/" + Platform.RESOURCE_PREFIX + "/" + System.mapLibraryName("jnidispatch").replace(".dylib", ".jnilib");
+            String mappedName = System.mapLibraryName("jnidispatch").replace(".dylib", ".jnilib");
+            if(Platform.isAIX()) {
+                // OpenJDK is reported to map to .so -- this works around the
+                // difference between J9 and OpenJDK
+                mappedName = "libjnidispatch.a";
+            }
+            String libName = "/com/sun/jna/" + Platform.RESOURCE_PREFIX + "/" + mappedName;
             File lib = extractFromResourcePath(libName, Native.class.getClassLoader());
             if (lib == null) {
                 if (lib == null) {