nm -C -u libgnuradio-<modulename>.so

 U __cxa_allocate_exception@@CXXABI_1.3
                 U __cxa_atexit@@GLIBC_2.2.5
                 U __cxa_begin_catch@@CXXABI_1.3
                 U __cxa_call_unexpected@@CXXABI_1.3
                 U __cxa_end_catch@@CXXABI_1.3
                 w __cxa_finalize@@GLIBC_2.2.5
                 U __cxa_free_exception@@CXXABI_1.3
                 U __cxa_guard_abort@@CXXABI_1.3
                 U __cxa_guard_acquire@@CXXABI_1.3
                 U __cxa_guard_release@@CXXABI_1.3
                 U __cxa_pure_virtual@@CXXABI_1.3
                 U __cxa_rethrow@@CXXABI_1.3
                 U __cxa_throw@@CXXABI_1.3
                 U __dynamic_cast@@CXXABI_1.3
                 w __gmon_start__
                 U __gxx_personality_v0@@CXXABI_1.3
                 w _ITM_deregisterTMCloneTable
                 w _ITM_registerTMCloneTable
                 w _Jv_RegisterClasses
                 U memmove@@GLIBC_2.2.5
                 w __pthread_key_create
                 U strlen@@GLIBC_2.2.5
                 U _Unwind_Resume@@GCC_3.0
                 U operator delete(void*)@@GLIBCXX_3.4
                 U gr::basic_block::message_port_register_out(boost::intrusive_ptr<pmt::pmt_base>)
                 U gr::io_signature::make(int, int, int)
                 U gr::msg_accepter::post(boost::intrusive_ptr<pmt::pmt_base>, boost::intrusive_ptr<pmt::pmt_base>)
                 U gr::ACK::Text_Sanitize_impl::forecast(int, std::vector<int, std::allocator<int> >&)
                 U gr::block::consume_each(int)
                 U gr::block::general_work(int, std::vector<int, std::allocator<int> >&, std::vector<void const*, std::allocator<void const*> >&, std::vector<void*, std::allocator<void*> >&)
                 U gr::block::set_processor_affinity(std::vector<int, std::allocator<int> > const&)
                 U gr::block::unset_processor_affinity()
                 U gr::block::fixed_rate_ninput_to_noutput(int)
                 U gr::block::fixed_rate_noutput_to_ninput(int)
                 U gr::block::stop()
                 U gr::block::start()
                 U gr::block::forecast(int, std::vector<int, std::allocator<int> >&)
                 U gr::block::block(std::string const&, boost::shared_ptr<gr::io_signature>, boost::shared_ptr<gr::io_signature>)
                 U gr::block::~block()
                 U pmt::dict_has_key(boost::intrusive_ptr<pmt::pmt_base> const&, boost::intrusive_ptr<pmt::pmt_base> const&)
                 U pmt::string_to_symbol(std::string const&)
                 U pmt::intrusive_ptr_add_ref(pmt::pmt_base*)
                 U pmt::intrusive_ptr_release(pmt::pmt_base*)
                 U pmt::eqv(boost::intrusive_ptr<pmt::pmt_base> const&, boost::intrusive_ptr<pmt::pmt_base> const&)
                 U pmt::print(boost::intrusive_ptr<pmt::pmt_base>)
                 U boost::system::system_category()
                 U boost::system::generic_category()
                 U gnuradio::detail::sptr_magic::fetch_initial_sptr(gr::basic_block*)
                 U std::bad_exception::what() const@@GLIBCXX_3.4.9
                 U std::runtime_error::what() const@@GLIBCXX_3.4
                 U std::bad_alloc::what() const@@GLIBCXX_3.4.9
                 U std::string::_Rep::_M_destroy(std::allocator<char> const&)@@GLIBCXX_3.4
                 U std::string::_Rep::_M_dispose(std::allocator<char> const&)@@GLIBCXX_3.4
                 U std::string::_Rep::_S_empty_rep_storage@@GLIBCXX_3.4
                 U std::string::append(char const*, unsigned long)@@GLIBCXX_3.4
                 U std::string::append(std::string const&)@@GLIBCXX_3.4
                 U std::string::assign(char const*, unsigned long)@@GLIBCXX_3.4
                 U std::basic_string<char, std::char_traits<char>, std::allocator<char> >::basic_string(char const*, std::allocator<char> const&)@@GLIBCXX_3.4
                 U std::basic_string<char, std::char_traits<char>, std::allocator<char> >::basic_string(std::string const&)@@GLIBCXX_3.4
                 U std::bad_exception::~bad_exception()@@GLIBCXX_3.4
                 U std::runtime_error::runtime_error(std::string const&)@@GLIBCXX_3.4
                 U std::runtime_error::runtime_error(std::string const&)@@GLIBCXX_3.4
                 U std::runtime_error::~runtime_error()@@GLIBCXX_3.4
                 U std::runtime_error::~runtime_error()@@GLIBCXX_3.4
                 U std::ios_base::Init::Init()@@GLIBCXX_3.4
                 U std::ios_base::Init::~Init()@@GLIBCXX_3.4
                 U std::bad_alloc::~bad_alloc()@@GLIBCXX_3.4
                 U std::basic_ios<char, std::char_traits<char> >::clear(std::_Ios_Iostate)@@GLIBCXX_3.4
                 U std::exception::~exception()@@GLIBCXX_3.4
                 U operator new(unsigned long)@@GLIBCXX_3.4
                 U std::basic_ostream<char, std::char_traits<char> >& std::__ostream_insert<char, std::char_traits<char> >(std::basic_ostream<char, std::char_traits<char> >&, char const*, long)@@GLIBCXX_3.4.9
                 U std::__throw_bad_alloc()@@GLIBCXX_3.4
                 U std::_Rb_tree_decrement(std::_Rb_tree_node_base*)@@GLIBCXX_3.4
                 U std::_Rb_tree_increment(std::_Rb_tree_node_base*)@@GLIBCXX_3.4
                 U std::_Rb_tree_insert_and_rebalance(bool, std::_Rb_tree_node_base*, std::_Rb_tree_node_base*, std::_Rb_tree_node_base&)@@GLIBCXX_3.4
                 U std::cout@@GLIBCXX_3.4
                 U typeinfo for gr::basic_block
                 U typeinfo for gr::block
                 U typeinfo for std::bad_exception@@GLIBCXX_3.4
                 U typeinfo for std::runtime_error@@GLIBCXX_3.4
                 U typeinfo for std::bad_alloc@@GLIBCXX_3.4
                 U virtual thunk to gr::ACK::Text_Sanitize_impl::forecast(int, std::vector<int, std::allocator<int> >&)
                 U vtable for __cxxabiv1::__class_type_info@@CXXABI_1.3
                 U vtable for __cxxabiv1::__si_class_type_info@@CXXABI_1.3
                 U vtable for __cxxabiv1::__vmi_class_type_info@@CXXABI_1.3
                 U vtable for std::runtime_error@@GLIBCXX_3.4