[LLVMdev] Use printing methods of third-party libraries that use std::ostream

[Jorge A. Navas]

Hi all,

I need to use the printing methods from a third-party library. The
problem is those methods use std::cout but the use of std::ostream
methods seems to be disabled in latest versions of LLVM.

I'm aware of raw_os_ostream
(http://llvm.org/doxygen/classllvm_1_1raw__os__ostream.html) which
takes a std::ostream as input. E.g., I could do something like:

#include "llvm/Support/raw_os_ostream.h"
#include "llvm/Support/raw_ostream.h"

raw_os_ostream * rout = new raw_os_ostream(std::cout);  // 1
// From now on, use rout rather than std::cout          // 2

The problem is that I get the error just with line 1 alone:

undefined symbol: _ZTVN4llvm14raw_os_ostreamE

What I am doing wrong? How can use the printing methods of my
third-party library?

P.S. Just in case, I use clang and llvm 3.0 in a linux machine.

Many thanks!

Jorge