[LLVMdev] llvm library linking issues

[Eugene]

I'm trying to make use of the llvm compiler libraries, but I can't get them to link to my program correctly. 

#include <llvm/Constants.h>
#include <llvm/DerivedTypes.h> 


int main(){ 

  llvm::APInt(1,0); 

  return 0;
}

I get an error like:
undefined reference to `llvm::APInt::initSlowCase(unsigned int, unsigned long long, bool) 

(this function is called by the inline APInt constructor)

The library seems to be found correctly; it doesn't give any other errors. Using nm I can see the mangled function initSlowCase exactly where I expect it to be. I'm out of ideas of that could be wrong. 

I'm using kubuntu 12.04. Same error occurs with both clang++ and g++. LLVM libraries are 3.1
Any ideas on what might be the problem?