gistfile1.txt

// In a header file
#include <user_main_fwd.hpp>
#define main nt2::user_main

//In a library
#include <...>

int hpx_main(boost::program_options::variables_map& vm)
{
  std::vector<std::string> args;
  bool condition = nt2::details::get_args(args);
  BOOST_ASSERT_MSG( condition == true
                  , "Enable to parse command line arguments on this system."
                  );
  int argc = args.size();
  char **argv= (char**)malloc(argc*sizeof(char*));

  std::vector<std::string>::iterator it = args.begin();
  for(std::size_t i=0; i < args.size(); i++)
  {
    std::string tmp = *it++;
    tmp+='\0';
    argv[i] = (char*)malloc((tmp.size())*sizeof(char));
    tmp.copy(argv[i], tmp.size(), 0);
  }

  {
    // Just need a forward declaration
    nt2::user_main(argc,argv);
  }
  return hpx::finalize();
}

int main(int argc, char *argv[])
{
  boost::program_options::options_description cmdline("Usage: " HPX_APPLICATION_STRING " [options]");
    
  return hpx::init(cmdline, argc, argv);
}