src/share/vm/utilities/globalDefinitions_gcc.hpp

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@@ -114,11 +114,13 @@
 // same size as a pointer.
 #ifdef LINUX
   #ifdef _LP64
     #define NULL_WORD  0L
   #else
-    #define NULL_WORD  0
+    // Cast 0 to intptr_t rather than int32_t since they are not the same type
+    // on platforms such as Mac OS X. 
+    #define NULL_WORD  ((intptr_t)0)
   #endif
 #else
   #define NULL_WORD  NULL
 #endif