[Lazarus] How many timers available on Linux (Raspberry Pi)?

[Michael Van Canneyt]

On Wed, 22 Jul 2020, Bo Berglund via lazarus wrote:

> On Wed, 22 Jul 2020 12:34:34 +0200 (CEST), Michael Van Canneyt via
> lazarus <lazarus at lists.lazarus-ide.org> wrote:
>
>>> Then while chasing a strange error concerning wsmenus I changed from
>>> what it was in the beginning to nogui.
>>
>> It means you have somewhere a reference to a LCL/VCL unit.
>>
>> Probably your use of TTimer caused this.
>>
>
> No, it was caused by package LazSerial...
> It brings in a number of units I would not use in any console app like
> this:
>
> SysUtils, lazsynaser,  LResources, Forms, Controls, Graphics, Dialogs;
>
> The "solution" (after googling a lot) was to add "interfaces" just
> before lazserial in the uses clause of the unit that handles the
> serial comm stuff:
>
>  {$IFDEF FPC}
>    interfaces, //Needed for LazSerial to work in a Console program
>    LazSerial,
>  {$ELSE} //Delphi
>
> Then these linker only errors went away (compile phase worked just
> fine before I did this).

The lazserial seems to be a wrapper around lazsynaser, which I assume is from synapse.

You should be OK just using directly lazsynaser.

It has no GUI dependencies. The drawback is probably that you must create
the component in code instead of dropping it on a datamodule.

I would suggest to the maintainers of lazserial to

a) Really clean up the uses clause.
    There is no need for  LResources, Forms, Controls, Graphics, Dialogs in the uses clause.

b) *always* put the registration of a component in a separate unit,
    never in the unit itself. It creates unwanted dependencies.


Michael.