After severl weeks of tying to access MySQL from C++ with ODBC,
I now downloaded libiodbc-3.0.6.tar.gz.tar built and installed it.
This went very smoothly.
I ran iodbcadm-gtk and added a driver but when I look at /etc/odbcinst.ini
and /etc/odbc.ini they are not changed.
I expected the new drive to be there.