I'm getting a compile error with my code to do with the boost::is_abstract class for compilers that don't support type_traits/is_abstract, i.e. those that have BOOST_NO_IS_ABSTRACT defined, BCB 5.6.4 in my case. Serialization/is_abstract.hpp defines an is_abstract class if BOOST_NO_IS_ABSTRACT is defined rather than including type_traits/is_abstract.hpp. With 1.33 RC1 type_traits/is_abstract.hpp now defines an is_abstract class if BOOST_NO_IS_ABSTRACT is defined, which it didn't use to do. Thus the class boost::is_abstract is multiply defined. Minimal code to reproduce the error is: #include <boost/type_traits.hpp> #include <boost/serialization/is_abstract.hpp> int main(int argc, char* argv[]) { return 0; } Compile that with BCB5.6.4 and you get: [C++ Error] is_abstract.hpp(32): E2238 Multiple declaration for 'is_abstract<T>' [C++ Error] is_abstract.hpp(130): E2344 Earlier declaration of 'is_abstract<T>' The first is serialization/is_abstract.hpp the second is type_traits/is_abstract.hpp. Perhaps serialization/is_abstract.hpp could check for type_traits/is_abstract.hpp having already been included or perhaps the serialization version is not now needed? Richard -----Original Message----- From: boost-users-bounces@lists.boost.org [mailto:boost-users-bounces@lists.boost.org] On Behalf Of Doug Gregor Sent: 01 August 2005 18:04 To: boost-users@lists.boost.org Subject: [Boost-users] [1.33.0] Release candidate #1 is available Boost 1.33.0 release candidate #1 is now available here: http://www.osl.iu.edu/~dgregor/boost-1.33.0/ There are two sets of files important for this release: - boost_1_33_0_rc1.*: The actual release candidate - boost_1_33_0_(docbook|fo|man).*: The documentation in other formats Please download and unpack the archives, browse the documentation, try the release with your favorite compiler, etc. Thanks! Doug Gregor 1.33.0 Release Manager _______________________________________________ Boost-users mailing list Boost-users@lists.boost.org http://lists.boost.org/mailman/listinfo.cgi/boost-users