Controls support for the RTTI features dynamic_cast and typeid in C++.
Use --no_rtti to disable source-level RTTI features such as dynamic_cast.
You are permitted to use dynamic_cast without --rtti in cases where RTTI is not required, such as dynamic cast to an unambiguous base, and dynamic cast to (void *). If you try to use dynamic_cast without --rtti in cases where RTTI is required, the compiler generates an error.
These options are effective only if the source language is C++.
The default is --rtti.