#define XSRETURN_UNDEF STMT_START { XST_mUNDEF(0); XSRETURN(1); } STMT_END
#define XSRETURN_EMPTY STMT_START { XSRETURN(0); } STMT_END
-#define newXSproto(a,b,c,d) sv_setpv((SV*)newXS(a,b,c), d)
+#define newXSproto(a,b,c,d) newXS_flags(a,b,c,d,0)
#ifdef XS_VERSION
# define XS_VERSION_BOOTCHECK \