Hi! Had anybody success in compiling an own project that uses boost with xcode 4.5.1 / apple llvm 4.1? I get this error: In file included from /Users/jwilhelmy/Coding/Install/include/boost/type_traits.hpp:35: In file included from /Users/jwilhelmy/Coding/Install/include/boost/type_traits/has_operator.hpp:42: In file included from /Users/jwilhelmy/Coding/Install/include/boost/type_traits/has_post_decrement.hpp:34: .../boost/type_traits/detail/has_postfix_operator.hpp:143:109: error: expected expression BOOST_STATIC_CONSTANT(bool, value = (sizeof(check(((make<Lhs>() BOOST_TT_TRAIT_OP),make<has_operator>())))==sizeof(::boost::type_traits::yes_type))); ^ .../boost/config/suffix.hpp:392:72: note: expanded from macro 'BOOST_STATIC_CONSTANT' # define BOOST_STATIC_CONSTANT(type, assignment) static const type assignment ^ -Jochen