How to add a static library (.lib) to Visual Studio ?

Question

Hi.

I have a static library comipled in C and I want to add this libarry which is static (.lib) into my exsiting project.
The libraryu has two external functions that I need to call in order to do a task in the solution.

Can you please tell me what step I need to take to add this library in Visual Studio 2008?!

Thanks

Answer 1

reference the library headers in Project Properties->C/C++->General->Additional Include Directories

reference the .lib in Project Properties->Linker->Input

see http://msdn.microsoft.com/en-us/library/ba1z7822.aspx for more details

hope this helps

Answer 2

Hi !

I added the library just the way they should be. I have a problem now :

8>WiiRemoteThread.obj : error LNK2019: unresolved external symbol "void __cdecl GetPosePosOrient(struct Mat_t *,struct rigid_t *)" (?GetPosePosOrient@@YAXPAUMat_t@@PAUrigid_t@@@Z) referenced in function "void __cdecl handle_event(struct wiimote_t *)" (?handle_event@@YAXPAUwiimote_t@@@Z)

8>WiiRemoteThread.obj : error LNK2019: unresolved external symbol "void __cdecl InitPoseEst(double,double * const,double * const)" (?InitPoseEst@@YAXNQAN0@Z) referenced in function "unsigned int __cdecl WiiRemoteThread(void *)" (?WiiRemoteThread@@YAIPAX@Z)

In the beginning the linker complained about that it could not find the library. When I fixed that I got the above errors.
The functions listed there are the functions inside the library and the linker seems not to be able to have access to them.

I am not sure if the library is not loaded properly or there are other reasons for that?!!
I use the exact function implementation as I have in library.

% function declaration in the lib file and in my c file

void InitPoseEst(double focal,double din[],double r0in[]);
void GetPosePosOrient(Mat_t* pPin,rigid_t* prigid);

Answer 3

Quote>I have a static library comipled in C

You are trying to use it in a program compiled as C++. You need extern "C" on
the prototypes in your source code:

#ifdef __cplusplus
   extern   "C"   {
#endif
void InitPoseEst(double focal,double din[],double r0in[]);
void GetPosePosOrient(Mat_t* pPin,rigid_t* prigid);
#ifdef __cplusplus
   }
#endif

- Wayne

Answer 4

Great ! Exactly that solved the problem. Ah I chekced everything except this.

thanks alot

Answer 5

hi yade

can you plz show me how did you implement this extern "C" in your code..

thanks

Answer 6

whoaa!!! i have done it!!!