Unable to use dynamic_cast (no RTTI)

[Edward Bart]

class A { public: virtual ~A() {} };
class B : public A { public: virtual ~B() {} };
A *a = dynamic_cast<B*>(new A);

HelloClient.cpp:61:12: error: cannot use dynamic_cast with -fno-rtti
    A *a = dynamic_cast<B*>(new A);

RTTI is disabled by default, is possible to enable it somehow? I want to port some codes in duetto however I need RTTI.

[Alessandro Pignotti (a-pignotti)]

Unfortunale RTTI is currently not supported. I've a partial solution for single inheritance cases but still need to fix multiple inheritance. That would only left out virtual inheritance which is currently unsupported anyway.