[LLVMdev] How to link the right libraries?

[Fernando Magno Quintao Pereira]

Hello, llvmers. Could someone explain me a little about the opt tool? I am
having problems to load a MachineFunctionPass using opt. I have this pass:

#include "llvm/Pass.h"
#include "llvm/Function.h"
#include "llvm/CodeGen/MachineFunctionPass.h"
#include <iostream>
using namespace llvm;

namespace {
  struct MacFoo : public MachineFunctionPass {
    virtual bool runOnMachineFunction(MachineFunction &Fn) {
      std::cerr << " calling run machine function.\n";
      return false;
    }
    virtual void getAnalysisUsage(AnalysisUsage &AU) const {
      AU.setPreservesAll();
    }
    virtual const char *getPassName() const {
      return "run on machine function";
    }
  };
  RegisterOpt<MacFoo> Z("allocpty", "Register Allocation Prototype Pass");

  struct FuncFoo : public FunctionPass {
    virtual bool runOnFunction(Function &F) {
      std::cerr << "Function name: " << F.getName() << "\n";
      return false;
    }
    virtual void getAnalysisUsage(AnalysisUsage &AU) const {
      AU.setPreservesAll();
    }
  };
  RegisterOpt<FuncFoo> X("funcPass", "Hello World Pass");
}

When I call:

$> opt -load ../../../../llvm/Debug/lib/LLVMTest.so -funcPass < hello.bc >
/dev/null

It works fine; when I try the machineFunctionPass class, it goes like
this:

$> opt -load ../../../../llvm/Debug/lib/LLVMTest.so -allocpty < hello.bc >
/dev/null

"opt: error while loading shared libraries:
../../../../llvm/Debug/lib/LLVMTest.so: undefined symbol:
_ZN4llvm15MachineFunction3getEPKNS_8FunctionE"

I would really appreciate if someone could tell me which files do I have
to link to make the 'allocpty' to work. My Makefile is this:

LEVEL = ../../..        # points to $HOME/llvm
LIBRARYNAME = LLVMTest
SHARED_LIBRARY = 1
LOADABLE_MODULE = 1

include $(LEVEL)/Makefile.common

warm regards,

Fernando