Xeon Phi Cilk Offload: problem with libraries

I try to use Cilk_offload on host + Xeon Phi. example.cpp:

#pragma offload_attribute (push, _Cilk_shared)
#include <vector>
#include <string>
#include "offload.h"
#pragma offload_attribute(pop)

int main(const int argc, const char *argv[]) {
    return 0;
}

Building: icc example.cpp -o example

When I try to run it, I get the following error:

On the sink, dlopen() returned NULL. The result of dlerror() is "/var/volatile/tmp/coi_procs/1/6847/load_lib/iccoutY1s4hB: undefined symbol: pthread_cancel_wrapper"
On the remote process, dlopen() failed. The error message sent back from the sink is /var/volatile/tmp/coi_procs/1/6847/load_lib/iccoutY1s4hB: undefined symbol: pthread_cancel_wrapper
offload error: cannot load library to the device 0 (error code 20)

And if I remove "#include <string>", everything is ok.

I need <vector> and <string> in a complex program where I have the same problem.

What should I do?