+AC_SUBST(BACKUP_SED_COND)
+if date +%Y-%m-%d 2>/dev/null >&2; then
+ BACKUP_SED_COND='/^#ELSE_DATE_FORMAT_OK/,/^#ENDIF_DATE_FORMAT_OK/d;/^#IF_DATE_FORMAT_OK/d'
+else
+ BACKUP_SED_COND='/^#IF_DATE_FORMAT_OK/,/^#ELSE_DATE_FORMAT_OK/d;/^#ENDIF_DATE_FORMAT_OK/d'
+fi
+
+