[Lazarus] Using Lazarus to build a (Linux) shared library, with a form

Mark Morgan Lloyd markMLl.lazarus at telemetry.co.uk
Mon Jun 11 12:34:16 CEST 2012

Sven Barth wrote:
> Am 11.06.2012 11:38, schrieb Mark Morgan Lloyd:
>> I'm struggling here. I can build a trivial (empty) .so using Lazarus
>> 1.1+2.6.0, the only necessary manual operation being to tell the project
>> options to remove the (Windows-specific?) -Wr option. I can load the
>> result at runtime, although I've not so far put significant code into it.
>> As soon as use Lazarus to add a form to the project, it no longer loads.
>> In order to find out what's going wrong I've had to use dlerror(), i.e.
>> bypassing the dynlibs library since it doesn't have a function e.g.
>> GetLoadErrorStr(). This shows me that the low-level dlopen() is
>> complaining "undefined symbol: WSRegisterCustomImageList".
>> What do I have to manually add to the project to get this working?
> Estimated guess: add unit "interfaces" to your library project file.

Thanks Sven, that does indeed fix it :-)

I was very much at the point of wanting to ask people who knew what they 
were doing, rather than flail around digging myself into a deeper hole.

Mark Morgan Lloyd
markMLl .AT. telemetry.co .DOT. uk

[Opinions above are the author's, not those of his employers or colleagues]

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