activate RTTI in c++

Question

Can anybody tell me how to activate RTTI in c++ when working on unix. I heard that it can be disabled and enabled. on my unix environment,how could i check whether RTTI is e

Answer 1

gcc has it on by default. Check if typeid(foo).name() gives you something useful.

#include <iostream>
#include <typeinfo>

int main()
{
 std::cout << typeid(int).name() << std::endl;
 return 0;
}

Without RTTI you get something like:

foo.cpp:6: error: cannot use typeid with -fno-rtti