Getting LNK2019 error on plugin compilation

deleted456

Hello @aha_1980 thanks a lot for your quick reply,
As you mentioned i checked again my compilers and saw that i used Microsoft Visual C++ Compiler (MSVC) 12.0 (2013) as decleared in https://www.qcad.org/en/qcad-documentation/supported-platforms. You can see the compilers used in the picture.

my compiler

compiler used to build Qcad

So im not sure if i got it correctly, did i used the same compiler with the one used to build QCad?

Thanks a lot.

aha_1980

@wodasdsa So QCAD is build as 64bit version, so you need to build your plugin as 64 bit too.

You'll need MSVC2013 64 bit (which you seem to have, the x86_amd64 version) and a suitable Qt version (can't tell that due to missing screenshot).

Regards

deleted456

Greetings,
I just uninstalled qt and compiler then installed it from https://download.qt.io/archive/qt/5.5/5.5.1/
I tried installing "qt-opensource-windows-x86-msvc2013_64-5.5.1.exe" and while installing i selected msvc2013_64 bit and installed Qt5.5 and msvc2013. On the kits panel i can see that Mscv2013_64 bit is installed but compiler shows 32bit version.

While building the plugin, I still get the error message i got in the previous version. And i'm not sure the issue is based on using different bit versions. There is no 64bit qt installer on https://download.qt.io/archive/qt/5.5/5.5.1/ and i can see that qt is compiled with
Architecture: x86_64 (the last pic from my previous post).

Could you please try to build the plugin by using your own qt and compiler and let me know about the specs? Cause im pretty sure that i installed the 64bit version of msvc2013 and respective sdk.

Apologies for taking your time and thanks a lot.

aha_1980

@wodasdsa

Please show screenshots of you Kits (click on Desktop 5.5.1 ... resp. Desktop (default)) to see how the Kits are set up.

Could you please try to build the plugin by using your own qt and compiler

Unfortunately, no. I neither have Windows nor MSVC :)

deleted456

Here you can see the information about kits,

Do you think these errors are based on using different bit versions? (btw i dont get the error and compile succesfully if i erase getPluginInfo() method from Reaxmpleplugin.cpp file (as i explained in my very first post)

Unfortunately, no. I neither have Windows nor MSVC :)

Oh okey thanks a lot anyways..

deleted456

and the manual desktop (default) panel,

deleted456

any update?

SGaist

Hi,

From the looks of it, you don't export any symbol from your library. This means that, on Windows, the linker won't find them.

deleted456

@SGaist said in Getting LNK2019 error on plugin compilation:

This means that, on Windows, the linker won't find them.

Hello thanks for you answer, to be honest im quite newbie to qt and im not exactly got what you have suggested. You mean the compiler doesnt found qcadcore.lib,qcadgui.lib and qcadecmaapi.lib files in exampleplugin.pro file? And if so how can i solve it?
Thanks a lot for your help

SGaist

~~Did yes, they want to see on them.~~

It's rather that they are not generated because no symbol were exported.

[edit: Something went wrong with the answer SGaist]

deleted456

Sorry what do you mean?

I had .dll files from source code and used this method https://adrianhenke.wordpress.com/2008/12/05/create-lib-file-from-dll/ to create .lib files

jsulm

@wodasdsa You should read http://doc.qt.io/qt-5/sharedlibrary.html

deleted456

i dont think the problem is in libraries i cant compile without them either..

SGaist

Can you show the relevant header(s) content ?

deleted456

Sure,
to see shared.pri you can check the following link,
https://github.com/qcad/qcad/blob/master/shared.pri

Thanks

SGaist

You're on Windows and not exporting any symbol hence the problem. Do as @jsulm suggested and use the export macros.

deleted456

How can i do that? im newbie to qt and didnt understand most the terms used in that documentation..

SGaist

Just follow the indications in the "Using Symbols from Shared Libraries" part.