Unexistent warning

Hello,

The following program does not output anything when compiled with icpc 15.0.2.132, with the flags "-std=c++11 -c -Wall":

extern int foo(char*);

int main() {
    foo("C");
    return 0;
}

In comparison, here is the output with g++ 4.9.2:

cpp:4:12: warning: deprecated conversion from string constant to 'char*' [-Wwrite-strings]

And with clang 3.5:

cpp:4:9: warning: ISO C++11 does not allow conversion from string literal to 'char *' [-Wc++11-compat-deprecated-writable-strings]

Thank you.