[fpc-pascal] Can Delphi load a small function of a shared lib written in Free Pascal 2.6.2?

silvioprog silvioprog at gmail.com
Fri Jan 17 01:30:29 CET 2014


2014/1/16 Michael Van Canneyt <michael at freepascal.org>
>
>  On Thu, 16 Jan 2014, Michael Van Canneyt wrote:
>>
>> On Thu, 16 Jan 2014, silvioprog wrote:
>>
>>> Hello,
>>> On Windows, I'm trying to serialize an object to JSON in Delphi 7, using
>>> FPC functions linked in a shared lib.
>>>
>>> I'm sendind a small demo in attached. To test it is very easy:
>>>
>>> 1. compile the libfpserializer.lpr file;
>>> 2. copy the generated lib to the demo/lazarus_ok folder;
>>> 3. copy the generated lib to the demo/delphi_bug folder;
>>>
>>> Now, compile the Lazarus project in "lazarus_ok" folder, compile, run
>>> and see that it works fine. Now, compile the
>>> Delphi project in "delphi_bug" folder, compile, run and see a bizzare
>>> bug that kills the app.
>>>
>>> So, in Delphi 7, its possible to consume a DLL written in Free Pascal?
>>>
>>
>> You cannot mix Delphi objects with FPC objects.
>>
>> They have a different memory layout, the RTTI is different etc.
>> So what you try to do is not possible.
>>
>
> I have somewhere a version of TJSONStreamer which uses SuperObject to
> write the JSON.
> If you want I can try to dig it up somewhere.
>
> Michael.


Very good friend. I want, and it will be very useful to me. Thank you! :)

-- 
Silvio Clécio
My public projects - github.com/silvioprog
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