Strange Linking Error!

Guest · Post by **Guest** » Fri Jun 18, 2004 7:39 am

When I try to compile my project, after adding some Irrlicht code into my engine:

//CIrrlichtManager.cpp
//Handles initiating irrlicht device, driver, smgr, gui and camera

//Include its header
#include "CIrrlichtManager.h"

void CIrrlichtManager::initIrrlicht()
{
//Create Irrlicht device
IrrlichtDevice *device =		createDevice(EDT_OPENGL, dimension2d<s32>(800,600), 16, false, false, 0);

//Define video driver, GUI environment and scene manager
IVideoDriver* driver = device->getVideoDriver();
ISceneManager* smgr = device->getSceneManager();
IGUIEnvironment* guienv = device->getGUIEnvironment();

//Create our FPS camera
ICameraSceneNode* camera = smgr->addCameraSceneNodeFPS(0, 30, 50, -1);
}

I get this linker error (IDE: Microsoft Visual C++ .NET 2003)

CIrrlichtManager.obj : error LNK2019: unresolved external symbol "__declspec(dllimport) class irr::IrrlichtDevice * __cdecl irr::createDevice(enum irr::video::EDriverType,class irr::core::dimension2d<int> const &,unsigned int,bool,bool,class irr::IEventReceiver *,unsigned short const *)" (__imp_?createDevice@irr@@YAPAVIrrlichtDevice@1@W4EDriverType@video@1@ABV?$dimension2d@H@core@1@I_N2PAVIEventReceiver@1@PBG@Z) referenced in function "private: void __thiscall CIrrlichtManager::initIrrlicht(void)" (?initIrrlicht@CIrrlichtManager@@AAEXXZ)
Debug/OninWars.exe : fatal error LNK1120: 1 unresolved externals

Thanks.

Endar · Post by **Endar** » Fri Jun 18, 2004 10:53 am

All the advice I can offer is to check that you have referenced the directories for the "irrlicht.h" and the "Irrlicht.lib" files and you have included them in your code.

Guest · Post by **Guest** » Fri Jun 18, 2004 11:10 am

...and the irrlicht.dll in the debug folder.

warui · Post by **warui** » Fri Jun 18, 2004 11:33 am

You linked irrlich library, didn't you ?

Look 'hello word' tutorial on how to compile project using irrlicht with MSVC.

warui · Post by **warui** » Fri Jun 18, 2004 11:34 am

Anonymous wrote:...and the irrlicht.dll in the debug folder.

And what if someone is making a release version ?

saigumi · Post by **saigumi** » Fri Jun 18, 2004 1:23 pm

With VC, it's the Release folder by default.

Guest · Post by **Guest** » Fri Jun 18, 2004 3:13 pm

hi
I have the same problem.
I have made a link in the Libary and Include(Sorry for my bad english im german)

Guest · Post by **Guest** » Fri Jun 18, 2004 3:15 pm

Sorry I forgoth.
if I open open zhe downloaded on and compile it. I get a message that he couldnt find dll

warui · Post by **warui** » Fri Jun 18, 2004 4:02 pm

@saigumi:
Yes i know

I just wanted to make a point, that Guest's answer was "this special case" only.

Guest · Post by **Guest** » Fri Jun 18, 2004 7:47 pm

In the hello world tutorial it says "Select the Menu Extras -> Options." This is not in Visual C++ .NET 2003, what is the equivalent of this?

bal · Post by **bal** » Fri Jun 18, 2004 8:13 pm

Anonymous wrote:In the hello world tutorial it says "Select the Menu Extras -> Options." This is not in Visual C++ .NET 2003, what is the equivalent of this?

Had some problems with this too. Here you can find it:

Right-click on your project -> Properties ->

C/C++ -> Includes: General (Additional Include Directories)
Linker -> Libs: General (Additional Library Directories)

Guest · Post by **Guest** » Fri Jun 18, 2004 8:19 pm

That's what I thought...

I already had both of those in there..

in my libs:
"C:\Documents and Settings\Owner\Desktop\3D\irrlicht-0.6\irrlicht-0.6\lib\VisualStudio

in my include:
C:\Documents and Settings\Owner\Desktop\3D\irrlicht-0.6\irrlicht-0.6\include

and I still get the error :\

Endar · Post by **Endar** » Sat Jun 19, 2004 1:25 am

Do you have the dll in the main directory??

For instance, if you have a directory "C:\helloWorld" and you have the model and textures inside "C:\helloWorld" and your .exe is in "C:\helloWorld\Debug", when I'm using Visual C++, because I'm running it within VC++ all the files (textures AND DLL's) need to be in the "C:\helloWorld" directory and NOT the Debug.

I'm not sure if it works that way in .NET, but it might be worth a try.

Guest · Post by **Guest** » Sat Jun 19, 2004 2:00 am

Alright, I added it to both the project directory and debug, but still, I get this same error:

CIrrlichtManager.obj : error LNK2019: unresolved external symbol "__declspec(dllimport) class irr::IrrlichtDevice * __cdecl irr::createDevice(enum irr::video::EDriverType,class irr::core::dimension2d<int> const &,unsigned int,bool,bool,class irr::IEventReceiver *,unsigned short const *)" (__imp_?createDevice@irr@@YAPAVIrrlichtDevice@1@W4EDriverType@video@1@ABV?$dimension2d@H@core@1@I_N2PAVIEventReceiver@1@PBG@Z) referenced in function "public: void __thiscall CIrrlichtManager::initIrrlicht(void)" (?initIrrlicht@CIrrlichtManager@@QAEXXZ)
Debug/OninWars.exe : fatal error LNK1120: 1 unresolved externals

Guest · Post by **Guest** » Sat Jun 19, 2004 2:11 am

Anonymous wrote:Alright, I added it to both the project directory and debug, but still, I get this same error:

CIrrlichtManager.obj : error LNK2019: unresolved external symbol "__declspec(dllimport) class irr::IrrlichtDevice * __cdecl irr::createDevice(enum irr::video::EDriverType,class irr::core::dimension2d<int> const &,unsigned int,bool,bool,class irr::IEventReceiver *,unsigned short const *)" (__imp_?createDevice@irr@@YAPAVIrrlichtDevice@1@W4EDriverType@video@1@ABV?$dimension2d@H@core@1@I_N2PAVIEventReceiver@1@PBG@Z) referenced in function "public: void __thiscall CIrrlichtManager::initIrrlicht(void)" (?initIrrlicht@CIrrlichtManager@@QAEXXZ)
Debug/OninWars.exe : fatal error LNK1120: 1 unresolved externals

This have nothing to do with the DLL, you must link the LIB
Try this at the top ove your code:

Code: Select all

#pragma comment(lib, "Irrlicht.lib")

It tells the compiler to link the lib
if it says "cant find irrlicht.lib" or something then check if you tell your compile the directorys where the irrlicht.lib is located (i am german too

)