Error: Cannot use typeid with -fno-rtti

Question

I´m getting this \"Cannot use typeid with -fno-rtti\" when I´m trying to compile my project, I´m using an opencv framework. I googled the problem but, it seems the errors I

Answer 1

RTTI stands for Run Time Type Information, and typeid is an RTTI-feature. So turning off RTTI (-fno-rtti) also disables features like typeid.

See http://en.wikipedia.org/wiki/RTTI for more information about RTTI in C++.

Answer 2

It's telling you the error right in the message: if you use the no-rtti flag on the compiler, then typeid is not going to be available. Just enable RTTI; it's part of C++ after all.