Can't use cxx::Thread

Hello,

  I tried to create a very simple application that uses cxx::Thread, but I have some link problems:
  ... Compiling main.o
  ==> Linking test_cxx_thread
main.o:(.rodata._ZTI10TestThread[_ZTI10TestThread]+0x8): undefined reference to `typeinfo for cxx::Thread'

Also I think it will be cleaner/better for developers if run, execute and shutdown methods will be moved to a protected section.


This is the main.cc content:
///////////////////////////////////////////////
#include <iostream>
#include <l4/cxx/thread>
#include <thread>

class TestThread : public cxx::Thread
{
public:
    TestThread():cxx::Thread(true){}
private:
    virtual void run()
    {
        std::cout << "TestThread" << std::endl;
    }
};

static void TestStdThread(int param)
{
    std::cout << "TestStdThread param:" << param << std::endl;
}

int main(int argc, char ** argv)
{
    (void)argc;
    (void)argv;
    TestThread cxxTh;
    cxxTh.start();
    std::thread stdTh(TestStdThread, 1);
    for (;;)
    {
        std::cout << "Hello World!" << std::endl;
        sleep( 1 );
    }
    stdTh.join();
}
///////////////////////////////////////////////

This is the Makefile content:
####################################
PKGDIR      ?= ../..
L4DIR       ?= $(PKGDIR)/../..

TARGET  = test_cxx_thread
SRC_CC  = main.cc

CXXFLAGS += -std=c++11
REQUIRES_LIBS = cxx_thread cxx_libc_io cxx_io libstdc++ libpthread
include $(L4DIR)/mk/prog.mk
####################################

Yours,
BogDan.