I got a complaint from a FreeBSD user that they couldn't compile dovecot against MySQL 8.0.

Is MySQL 8.0 support with 2.3.4?

they receive: 
checking for mysql_init in -lmysqlclient... no
configure: error: Can't build with MySQL support: libmysqlclient not
  found ===>  Script "configure" failed unexpectedly.
Please report the problem to ler@FreeBSD.org [maintainer] and attach the
"/wrkdirs/usr/ports/mail/dovecot/work/dovecot-2.3.4/config.log"
  including the output of the failure of your make command. Also, it
  might be a good idea to provide an overview of all packages installed
  on your system (e.g. a /usr/local/sbin/pkg-static info -g -Ea).
*** Error code 1

thanks!

--
Larry Rosenman                     http://www.lerctr.org/~ler
Phone: +1 214-642-9640 (c)     E-Mail: larryrtx@gmail.com
US Mail: 5708 Sabbia Dr, Round Rock, TX 78665-2106