[fpc-devel] MySQL v4.0 v4.1 and v5.0

[Vincent Snijders]

Joost van der Sluis wrote:
> Hi all,
> 
> atm I have a nearly finished mysql.inc file that can be used with MySQL
> v4.0 v4.1 and v5.0. Loaded dynamically and static.
> 
> It uses several defines to set the right MySQL version and to turn the
> dynamically linking on or off.
> 
> Create 6 different units in packages/base/mysql - for each combination
> one? (thus mysql40, mysql40dyn, mysql41, mysql41dyn, mysql50 and
> mysql51dyn?)
> 
> But then, what to do with the MySQL-connection for sqldb? In principle
> the only thing that has to be changes to use another MySQL-version is to
> change the used unit. So, always use the TMysqlConn-component, but
> changes the usage-clausule.
> 
> But how can this be handled by Lazarus? With the SQLDB-package only one
> unit can be used. (Or else multiple types with the same name are
> defined) Let the users manually change the usage-line if they want to
> use a different MySQL-library-version?

FOr the sqldb package, let them add a define to the compiler options:
-dMYSQL40
or
-dMYSQL41
or
-dMYSQL50

That seems more user friendly than editing the uses clause.

In the source, change the uses clause, depending on the defines.

Vincent.