issues with offload and #include

Hi!

I have this code:

//#include <string>

#pragma offload_attribute (push, target(mic))
#include <algorithm>
#include <numeric>
#pragma offload_attribute (pop)

int main() {
    #pragma offload target(mic)
    {
        int a[10] = {0,1,9,2,8,3,7,4,6,5};
        int b[10];
        std::iota(b, b+10, 0);
        std::sort(b, b+10, [&](int i, int j){ return a[i] < a[j]; });
    }
    return 0;
}

The code compiles ok, except when I uncomment the "#include <string>". In this case I get a ton of undefined references.

Can anybody tell me why?

Thanks,
Martijn