Hi!
Actually the tst_flush has been removed in:
commit eb50f0a9e0c26f3cab8472f47a2ea8171ce5ee52
Author: Michael Moese <mmoese@suse.de>
Date: Fri Mar 9 15:16:07 2018 +0100
remove old tst_flush()
So the right solution is to remove it from the Makefile. I will commit
that, thanks for the report.
--
Cyril Hrubis
chrubis@suse.cz