There were zillions of changes... please see the Changelog file.
Now it builds with both mysql-4.1.x and mysql-5.1.x.
pkgsrc changes:
Supported build options:
* myodbc-gui: builds the QT widgets library. (disabled)
* myodbc-iodbc: uses iodbc for the odbc functions. (enabled)
* myodbc-unixodbc: uses unixodbc for the odbc functions. (disabled)
Uses MASTER_SITE_MYSQL.