[Boost-users] Re: Using boost::shared_ptr<> with G++'s -fno-rtti

Jonathan Lennox writes:

Is it possible to use boost::shared_ptr<> without RTTI being enabled? I'm trying to port some code to the Sharp Zaurus, and its GUI libraries are all compiled with the G++ flags -fno-exceptions -fno-rtti. Boost seems to support the former flag just fine, but has problems with the latter:

g++ -g -O2 -Wall -fno-rtti -fno-exceptions -o sipua/main.o -c ../sipua/main.cpp In file included from ../libcine/boost/shared_ptr.hpp:27, from ../rtplib++/rtptypes.h:8, from ../rtplib++/rtpsession.h:14, from ../sipua/radio.h:11, from ../sipua/main.cpp:18: ../libcine/boost/detail/shared_count.hpp: In member function `virtual void* boost::detail::sp_counted_base_impl::get_deleter(const std::type_info&)': ../libcine/boost/detail/shared_count.hpp:267: error: cannot use typeid with -fno-rtti In file included from ../rtplib++/rtptypes.h:8, from ../rtplib++/rtpsession.h:14, from ../sipua/radio.h:11, from ../sipua/main.cpp:18: ../libcine/boost/shared_ptr.hpp: In function `D* boost::get_deleter(const boost::shared_ptr<U>&)': ../libcine/boost/shared_ptr.hpp:431: error: cannot use typeid with -fno-rtti

What is the typeid call in the get_deleter functions doing?

The documentation tells all. http://www.boost.org/libs/smart_ptr/shared_ptr.htm#get_deleter

Is there any way to work around or disable this?

You can comment out the entire get_deleter function, provided you never try to use it ;^) -- Dave Abrahams Boost Consulting www.boost-consulting.com