It seems the Lazaurs uses SQLite. (For what, btw? just curious)

I'd like to use in in one of the demos for TAChart (see http://forum.lazarus.freepascal.org/index.php/topic,17636.0.html).

So how does Lazarus find the SQLite library?
On Windows I suppose I can hard-code a path to the dll relative to the demo directory.
But what about other platforms?

It seems the Lazaurs uses SQLite. (For what, btw? just curious)

Not at all, except if you install SQLite component.

So how does Lazarus find the SQLite library?

Windows: anywhere in PATH
*nix: /usr/lib or /usr/local/lib usually, but other places are possible (not really sure about all of them, it may differ one to another)

You are right. This sounds like a bug in the component, however -- after installation of sqllite3laz package, Lazarus itself fails to start in there is no DLL in path.
The DLL should be loaded only when the connection is made, similar to the other databases.

Windows: anywhere in PATH *nix: /usr/lib or /usr/local/lib usually, but other places are possible (not really sure about all of them, it may differ one to another)

I see. Based my incorrect conclusion that Lazarus itself uses SQLite I was hoping to guarantee its presence for the demo.
I'll just write in the demo documentation that it is required :)

This sounds like a bug in the component

Or by design ;)
Try asking the author, it should be written somewhere in the package files

Alexander Klenin wrote

I see. Based my incorrect conclusion that Lazarus itself uses SQLite I was hoping to guarantee its presence for the demo. I'll just write in the demo documentation that it is required :)

Applies to any database: has to be installed, and naming/symlinks need to be correct. I thought that at one time there was a proposal that an initialisation call should be able to specify a library's exact name.

It is so, but a default is used when the library is first needed, if if was not loaded with an explicitly specified name.

Michael.

Dear Mr. Klenin:

I have installed succesfully the SQLite3 and I have done the excersice covered in the Tutorial01 and Tutorial02.

The tutorial03 don?t work.

I will appreciate very much to know when you will publish the demo documentation mentioned.

thanks in advance,

Ing. H?ctor F. Fiandor Rosario