Symbol 'is_integral' could not be resolved

Question

I tried to solve a C++ symbol problem but I could not find a solution:

here is my code:

#include <iostream>
#include <type_traits>

using namespace std;


/*
 * static_assert(constant-expression, error-message): static_assert provides compile-time asserts.
 * type traits: characteristics checked at compile-time
 */


template<class T>

T bitwise_and(T x, T y) {
     static_assert(is_integral<T>::value, "bitwise_and parameters must be of integral type");
     return x % y;
}

int main() {

     //1. Basic static_assert example
     static_assert(sizeof(long) == 8 , "32 bit required");

     //2. calling a generic function that enforces type rules with static_assert
     unsigned int x = 122127, y = 10;
     int r = bitwise_and(x, y);
     cout << r << endl;

     unsigned char c = 10, d = 2;
     int r1 = bitwise_and(c, d);
     cout << r1 << endl;

     // assert is not valid
     //double w = 1, z = 10;
     //int r2 = bitwise_and(w, z);

     cout << "End" << endl; // prints
     return 0;
}

I have added the option -std=c++11 to eclipse Mars.2 (4.5.2) like this:

eclipse c++11 setting

but its not working

I have tried -std=c++14, its not working too any idea ?

my c++11 setting is working for other new language features

Note: the code in running fine under visual studio 2015 community edition

here is the errors after build:

errors output

gcc: gcc version 5.3.1 20160406 (Red Hat 5.3.1-6) (GCC)

thanks.