as suggested by Sarathy.
p4raw-id: //depot/perl@12687
# if defined(PERL_IMPLICIT_SYS) || defined(WIN32)
PerlEnv_clearenv();
# else
-#if !defined(MACOS_TRADITIONAL)
+# ifdef USE_ENVIRON_ARRAY
# ifndef PERL_USE_SAFE_PUTENV
I32 i;
environ[0] = Nullch;
-#endif /* !defined(MACOS_TRADITIONAL) */
-# endif /* PERL_IMPLICIT_SYS */
-#endif /* VMS */
+# endif /* USE_ENVIRON_ARRAY */
+# endif /* PERL_IMPLICIT_SYS || WIN32 */
+#endif /* VMS || EPC */
return 0;
}