simple and correct program using asio (http://tenermerx.com/Asio/):

#include <asio.hpp>
int main() {
    asio::io_service io;
    return 0;
}

(compile with "g++   -lpthread  test.cc   -o test")

When running this program under vagrind, it gives a note
------------------------------------------------------------------
--24304-- WARNING: unhandled syscall: 323
--24304-- You may be able to write your own handler.
--24304-- Read the file README_MISSING_SYSCALL_OR_IOCTL.
--24304-- Nevertheless we consider this a bug.  Please report
--24304-- it at http://valgrind.org/support/bug_reports.html.
------------------------------------------------------------------
and ends with
------------------------------------------------------------------
terminate called after throwing an instance of 'asio::system_error'
  what():  eventfd_select_interrupter: Function not implemented
------------------------------------------------------------------

Asio version: 1.3.0
g++ version: (GCC) 4.2.3 (Ubuntu 4.2.3-2ubuntu7)
valgrind version: 3.3.0-Debian