+#ifdef PERL_IS_5_6
+/* We should be using the PL_errgv, I think */
+/* All the old style variables are prefixed with PL_ now */
+# define errgv PL_errgv
+# define na PL_na
+#endif
+
+#ifdef HAVE_WIN32_ASPERL
+/* pTHX is needed often now */
+# define PERL_INTERPRETER my_perl
+# define PERL_BACK_XS_INIT_PARAMS pTHX
+# define PERL_BACK_BOOT_DYNALOADER_PARAMS pTHX, CV *cv
+#else
+# define PERL_INTERPRETER perl_interpreter
+# define PERL_BACK_XS_INIT_PARAMS void
+# define PERL_BACK_BOOT_DYNALOADER_PARAMS CV *cv
+#endif
+
+extern PerlInterpreter *PERL_INTERPRETER;
+
+