Compile error for the Hello pass example of llvm

Question

Hello all,

I was trying the Hello pass example in the "Writing an LLVM Pass" webpage ( http://llvm.org/docs/WritingAnLLVMPass.html#basiccode ). I followed the instructions to compile (with gcc-4.2) the Hello.cpp, but I got the compile errors:

Hello.cpp:20: error: expected identifier before string constant
Hello.cpp:20: error: expected ',' or '...' before string constant
Hello.cpp:20: error: expected constructor, destructor, or type conversion before ';' token

which is the line "INITIALIZE_PASS(Hello, "Hello", "Hello World Pass", false, false);" in the program. The program is:

#include "llvm/Pass.h"  
#include "llvm/Function.h"  
#include "llvm/Support/raw_ostream.h"

using namespace llvm;

namespace {  

 struct Hello : public FunctionPass {  
    static char ID;  
    Hello() : FunctionPass(&ID) {}  

    virtual bool runOnFunction(Function &F) {  
        errs() << "Hello: " << F.getName() << "\n";  
        return false;  
    }  
 };  

 char Hello::ID = 0;  
 INITIALIZE_PASS(Hello, "Hello", "Hello World Pass", false, false);  

}

Could any one help me with this? Thank you very much!

Best,
Daniel