Hi Daryle, hi all, I am using the Hamigaki Archivers library ( http://hamigaki.sourceforge.jp/). This library depends on Boost.Crc. Somewhere in the code there is something like ... boost::detail::reflector<32>::reflect(0x12345678); This compiles fine using Boost 1.52.0, but fails using Boost Trunk. The following code part does not exist anymore in boost/crc.hpp ( on the Trunk ) ... // Function that reflects its argument template < std::size_t Bits > typename reflector<Bits>::value_type reflector<Bits>::reflect ( typename reflector<Bits>::value_type x ) { value_type reflection = 0; value_type const one = 1; for ( std::size_t i = 0 ; i < Bits ; ++i, x >>= 1 ) { if ( x & one ) { reflection |= ( one << (Bits - 1u - i) ); } } return reflection; } Is there any replacement? Thanks and regards, Fernando P.