I'm a user of boost::unordered_map and I always used this container with exceptions disabled (because I never use them and don't want them enabled if possible). I never had problems with that, but now with boost 1.50 and GCC 4.7.1 I get this error while compiling code using unordered_map:
In file included from /usr/include/boost/unordered/unordered_map.hpp:17:0,
from /usr/include/boost/unordered_map.hpp:16,
from /home/hades/Bitral/include/CodeRegion.h:23,
from /home/hades/Bitral/src/BitralContext.cpp:20:
/usr/include/boost/unordered/detail/allocator_helpers.hpp: In instantiation of 'void boost::unordered::detail::construct_node(Alloc&, T*, const Args&) [with Alloc = std::allocator<boost::unordered::detail::ptr_node<std::pair<const Bitral::ConstantMemoryAddress, Bitral::CodeRegion*> > >; T = boost::unordered::detail::ptr_node<std::pair<const Bitral::ConstantMemoryAddress, Bitral::CodeRegion*> >; Args = boost::unordered::detail::emplace_args3<boost::unordered::piecewise_construct_t, boost::tuples::tuple<Bitral::ConstantMemoryAddress, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type>, boost::tuples::tuple<> >]':
/usr/include/boost/unordered/detail/buckets.hpp:75:13: required from 'void boost::unordered::detail::node_constructor<NodeAlloc>::construct_value(const Args&) [with Args = boost::unordered::detail::emplace_args3<boost::unordered::piecewise_construct_t, boost::tuples::tuple<Bitral::ConstantMemoryAddress, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type>, boost::tuples::tuple<> >; NodeAlloc = std::allocator<boost::unordered::detail::ptr_node<std::pair<const Bitral::ConstantMemoryAddress, Bitral::CodeRegion*> > >]'
/usr/include/boost/unordered/detail/unique.hpp:386:13: required from 'boost::unordered::detail::table_impl<Types>::value_type& boost::unordered::detail::table_impl<Types>::operator[](const key_type&) [with Types = boost::unordered::detail::map<std::allocator<std::pair<const Bitral::ConstantMemoryAddress, Bitral::CodeRegion*> >, Bitral::ConstantMemoryAddress, Bitral::CodeRegion*, boost::hash<Bitral::ConstantMemoryAddress>, std::equal_to<Bitral::ConstantMemoryAddress> >; boost::unordered::detail::table_impl<Types>::value_type = std::pair<const Bitral::ConstantMemoryAddress, Bitral::CodeRegion*>; boost::unordered::detail::table_impl<Types>::key_type = Bitral::ConstantMemoryAddress]'
/usr/include/boost/unordered/unordered_map.hpp:1196:26: required from 'boost::unordered::unordered_map<K, T, H, P, A>::mapped_type& boost::unordered::unordered_map<K, T, H, P, A>::operator[](const key_type&) [with K = Bitral::ConstantMemoryAddress; T = Bitral::CodeRegion*; H = boost::hash<Bitral::ConstantMemoryAddress>; P = std::equal_to<Bitral::ConstantMemoryAddress>; A = std::allocator<std::pair<const Bitral::ConstantMemoryAddress, Bitral::CodeRegion*> >; boost::unordered::unordered_map<K, T, H, P, A>::mapped_type = Bitral::CodeRegion*; boost::unordered::unordered_map<K, T, H, P, A>::key_type = Bitral::ConstantMemoryAddress]'
/home/hades/Bitral/src/BitralContext.cpp:30:31: required from here
/usr/include/boost/unordered/detail/allocator_helpers.hpp:643:11: error: exception handling disabled, use -fexceptions to enable
The strange thing is that compiling the code with CLANG 3.1 and exceptions explicitly disabled works fine.