Need help for plugins

[Ptizef]

in a plugin , when I call any of the cartographic functions as "DistanceBearingMercator" or "toSM" ... I get a LNK2019 error (external not resolved)
The other functions work well
any idea ?
many thanks
Jean Pierre

[bdbcat]

jp...

IIRC, you are on Windows?

Did you build the latest Windows release of 3.2.0, so that you have the correct export library available to your PlugIn?

That is an aggravation of Windows dll architecture. Linux, on the other hand, defers all dynamic library symbol resolution until runtime....

Dave

[Ptizef]

Dave

Thanks for your answer.
Yes it's the the last 3.2.0 I tried to build .
As I wrote above ,when I call all functions as "GetChartbarHeight" or "JumpToPosition" etc.. , I have no problem .
The problem comes when I call all the cartographic ones . In fact all which don't use DECL_EXP _declspec(dllexport)

regards
Jean Pierre

[Ptizef]

Sorry , I omitted :
Windows Vista - VS 2010
JP

[nohal]

JP...
There would be nothing easier than looking at your code. It will probably reveal the cause much faster than this guesswork. So, github repo, please...

Pavel

[bdbcat]

jp....

Ouch. This looks like a bug.

So, does it link OK if you modify ocpn_plugin.h, add the DECL_EXP to the georef function definitions, and rebuild?

Dave

[Ptizef]

Dave

I rebuilt OpenCpn after having added DECL_EXP . To compile , I had to add it in both ocpn_plugin.h and georef.h and add the DECL_EXP define in georef.h, but at the end I succeed
Unfortunately , I got the same link error !
At that time , the only solution I found was to create a new function calling the original one in pluginmanager.cpp :

for example:

in ocpn_plugin.h I added :
extern "C" DECL_EXP void DistanceBearingMercator_Plugin(double lat0, double lon0, double lat1, double lon1, double *brg, double *dist);

and in pluginmanager.cpp I added :
void DistanceBearingMercator_Plugin(double lat0, double lon0, double lat1, double lon1, double *brg, double *dist)
{
DistanceBearingMercator( lat0, lon0, lat1, lon1, &*brg, &*dist);
}

and in the plugin I called DistanceBearingMercator_Plugin ... and it works


Pavel

I'll try to do that . Sorry I still do not control all the github possibilities.
But I don't think it's from my code because I just added a new instrument very similar to "_position" at the dashboard, working perfectly except when I call one of the georef functions

many thanks for your help

regards

[Ptizef]

Hi

My code is at https://github.com/Ptizef/OpenCPN/
branch DASHBOARD_NO_COMPILE for the link error and branch DASHBOARD_WORKAROUND for the solution I found
regards
Jean Pierre