--- IO-AIO/config.h.in	2019/09/06 22:03:08	1.7
+++ IO-AIO/config.h.in	2020/12/29 15:16:28	1.8
@@ -96,6 +96,9 @@
 /* sync_file_range(2) is available */
 #undef HAVE_SYNC_FILE_RANGE
 
+/* unix syscall interface */
+#undef HAVE_SYSCALL
+
 /* Define to 1 if you have the <sys/mkdev.h> header file. */
 #undef HAVE_SYS_MKDEV_H