+#ifdef USE_64_BIT_ALL
+# define AIX_SCNHDR SCNHDR_64
+# define AIX_LDHDR LDHDR_64
+# define AIX_LDSYM LDSYM_64
+# define AIX_LDHDRSZ LDHDRSZ_64
+#else
+# define AIX_SCNHDR SCNHDR
+# define AIX_LDHDR LDHDR
+# define AIX_LDSYM LDSYM
+# define AIX_LDHDRSZ LDHDRSZ
+#endif
+
+/* When using Perl extensions written in C++ the longer versions
+ * of load() and unload() from libC and libC_r need to be used,
+ * otherwise statics in the extensions won't get initialized right.
+ * -- Stephanie Beals <bealzy@us.ibm.com> */
+
+/* Older AIX C compilers cannot deal with C++ double-slash comments in
+ the ibmcxx and/or xlC includes. Since we only need a single file,
+ be more fine-grained about what's included <hirschs@btv.ibm.com> */
+
+#ifdef USE_libC /* The define comes, when it comes, from hints/aix.pl. */
+# define LOAD loadAndInit
+# define UNLOAD terminateAndUnload
+# if defined(USE_vacpp_load_h)
+# include "/usr/vacpp/include/load.h"
+# elif defined(USE_ibmcxx_load_h)
+# include "/usr/ibmcxx/include/load.h"
+# elif defined(USE_xlC_load_h)
+# include "/usr/lpp/xlC/include/load.h"
+# elif defined(USE_load_h)
+# include "/usr/include/load.h"
+# endif
+#else
+# define LOAD load
+# define UNLOAD unload
+#endif
+