linking OpenCascade libraries to C++ programs

I wrote the following C++ program that checks validates a STEP file:

#include
#include
#include "STEPControl_Reader.hxx"
using namespace std;

#define FILENAME "linkrods.step"

int main (int argc, char* argv[])
{

// create reader and read the STEP file
STEPControl_Reader reader;
IFSelect_ReturnStatus stat = reader.ReadFile(FILENAME);
if (stat != IFSelect_RetDone)
{
if (stat == IFSelect_RetVoid)
cout

else if (stat == IFSelect_RetError)
cout

return 0;
}

// check the validity of the STEP file
IFSelect_PrintCount mode = IFSelect_ItemsByEntity;
reader.PrintCheckLoad(false, mode);

}

I can compile this, but I cant link the program because I can't find any OpenCascade libraries.

What libraries should we use in this situation? Are they available?

Any help is greatly appreciated!!!

Peter