#if !(defined(HAS_SIGACTION) && defined(SA_SIGINFO))
#define csighandler Perl_csighandler
#endif
+#if !defined(EBCDIC)
+#define _variant_byte_number S__variant_byte_number
+#endif
#if !defined(HAS_TRUNCATE) && !defined(HAS_CHSIZE) && defined(F_FREESP)
#define my_chsize(a,b) Perl_my_chsize(aTHX_ a,b)
#endif