Irrphysx link error

Adler1337 · Post by **Adler1337** » Sun Aug 23, 2009 5:03 pm

Hello
I am trying to learn Irrphysx, but when i add the lines

physxManager = createPhysxManager(device, sceneDesc, false);
removePhysxManager(physxManager);

I get two linker errors:
error LNK2001: unresolved external symbol "void __cdecl IrrPhysx::removePhysxManager(class IrrPhysx::IPhysxManager *)" (?removePhysxManager@IrrPhysx@@YAXPAVIPhysxManager@1@@Z)

error LNK2001: unresolved external symbol "class IrrPhysx::IPhysxManager * __cdecl IrrPhysx::createPhysxManager(class irr::IrrlichtDevice *,struct IrrPhysx::SSceneDesc const &,bool)" (?createPhysxManager@IrrPhysx@@YAPAVIPhysxManager@1@PAVIrrlichtDevice@irr@@ABUSSceneDesc@1@_N@Z)

One error for each of the lines of code. Does anybody know why this is happening and how to fix it?

Sylence · Post by **Sylence** » Sun Aug 23, 2009 5:18 pm

You have to link with the library that is inside the IrrPhysx SDK.
I am sure that this is covered in the tutorials / readme of IrrPhysx

Adler1337 · Post by **Adler1337** » Sun Aug 23, 2009 5:47 pm

Sorry to sound like an idiot, but how do i do that? I looked at the readme and tutorials, but i didn't see anything.

Seven · Post by **Seven** » Sun Aug 23, 2009 5:53 pm

linking with external libraries is a basic step for programming. we could help you here, but I think we do you more help by asking you to get a basic programming book and read up on it. you dont need the latest greatest $85.00 Amazon book. You can pick these up at any used book store for a few dollars. trust me, reading a little bit on these basics will leap your programming skills far more than us telling you how to link a library.

Adler1337 · Post by **Adler1337** » Sun Aug 23, 2009 6:01 pm

I've been looking online for an answer, but every time i try something i just get more errors. If you can help me, then do it. Don't tell me to buy a book. I can learn the same if you tell me and i fix the error now, or i take a couple of days and find some outdated book.

Seven · Post by **Seven** » Sun Aug 23, 2009 6:09 pm

if I can help you then do it? wow.... good luck in your endeavors.

Adler1337 · Post by **Adler1337** » Sun Aug 23, 2009 6:17 pm

Sorry to sound rude.

I was using the Heightfield example, but when i compile it i get a similar error. When i am just using irrlicht and not irrphysx, i normally use a pragma comment to link to the lib. I have tried that for irrphysx, but i get these errors:

Linking...
1>IrrPhysx.lib(IrrPhysx.obj) : MSIL .netmodule or module compiled with /GL found; restarting link with /LTCG; add /LTCG to the link command line to improve linker performance
1>LINK : warning LNK4075: ignoring '/INCREMENTAL' due to '/LTCG' specification
1>LINK : warning LNK4098: defaultlib 'LIBCMT' conflicts with use of other libs; use /NODEFAULTLIB:library
1>IrrPhysx.lib(CPhysxManager.obj) : error LNK2001: unresolved external symbol __imp__NxReleasePhysicsSDK
1>IrrPhysx.lib(CPhysxManager.obj) : error LNK2001: unresolved external symbol __imp__NxCreatePhysicsSDK
1>IrrPhysx.lib(Cooking.obj) : error LNK2001: unresolved external symbol __imp__NxGetCookingLib

I have also tried going to project->properties->linker and adding it there, but i keep getting errors. Once again Seven, i am sorry, but i didn't want figuring this out to take more than a couple of hours, since i seems to be so simple.

Seven · Post by **Seven** » Sun Aug 23, 2009 6:21 pm

#pragma comment(lib, "PhysxLoader.lib")
#pragma comment(lib, "NxCharacter.lib")
#pragma comment(lib, "NxCooking.lib")

I cant speak directly to IrrPhsx as I modified it some and cant remember exactly whatI have to add to it. seems that I that i had to add the above to it though....

Adler1337 · Post by **Adler1337** » Sun Aug 23, 2009 6:25 pm

Thanks for the help, especially after i was such an @ss. But it says it can't open the files.

Seven · Post by **Seven** » Sun Aug 23, 2009 6:27 pm

Adler1337 wrote:Thanks for the help, especially after i was such an @ss. But it says it can't open the files.

np, the lib's are in the Physx SDK folder (not Irrphysx, but the physx sdk folder) . If you search your harddrive you will find them deep in the sdk folder.

Adler1337 · Post by **Adler1337** » Sun Aug 23, 2009 8:24 pm

ok thanks.

Adler1337 · Post by **Adler1337** » Thu Aug 27, 2009 11:32 pm

I haven't had much time to work on it, but i think found all of the lib i need to link to. I tried the code you provided, but it keeps saying it can't open the files. I'm not sure what is going on, but any suggestions are greatly appreciated.

JP · Post by JP » Fri Aug 28, 2009 7:45 am

Just set up the linker in the properties, pointing to the specific libraries requried, that's how all the IrrPhysx examples are setup.

Adler1337 · Post by **Adler1337** » Fri Aug 28, 2009 3:43 pm

I think i have it set up correctly, but i am still getting the link errors:

Error 1 error LNK2019: unresolved external symbol "void __cdecl IrrPhysx::removePhysxManager(class IrrPhysx::IPhysxManager *)" (?removePhysxManager@IrrPhysx@@YAXPAVIPhysxManager@1@@Z) referenced in function _wmain Mars.obj

Error 2 error LNK2019: unresolved external symbol "class IrrPhysx::IPhysxManager * __cdecl IrrPhysx::createPhysxManager(class irr::IrrlichtDevice *,struct IrrPhysx::SSceneDesc const &,bool)" (?createPhysxManager@IrrPhysx@@YAPAVIPhysxManager@1@PAVIrrlichtDevice@irr@@ABUSSceneDesc@1@_N@Z) referenced in function _wmain Mars.obj
I have it set up just like i normally set up irrlicht, except i added the directories for irrphysx and Physx. Am i still missing a pragma comment?
Here is what i got:
#include <irrlicht.h>
#include "stdafx.h"
#include <IrrPhysx.h>
#include <MastEventReceiver.h>

using namespace irr;
using namespace core;
using namespace scene;
using namespace video;
using namespace io;
using namespace gui;
using namespace IrrPhysx;

#pragma comment(lib, "Irrlicht.lib")
#pragma comment(lib, "PhysxLoader.lib")
#pragma comment(lib, "NxCharacter.lib")
#pragma comment(lib, "NxCooking.lib")

JP · Post by JP » Fri Aug 28, 2009 4:10 pm

Might help linking to IrrPhysx.lib too