Hi, I'm trying to see how far I can bring more compilers to compile MSM and I noticed that these 2 compilers might have a chance to work: - On gcc 4.0.1, most regression tests (for example: http://www.boost.org/development/tests/trunk/developer/output/Sandia-darwin-...) fail because in msm/back/state_machine.hpp, the nested struct add_state cannot access the private function set_containing_sm. IIUC this should be BOOST_NO_NESTED_FRIENDSHIP. Correct? If yes, could we add this macro for gcc 4.0.1 (unfortunately, no idea about 4.0.1 - 4.2 but I suppose this will concern all 4.0.x)? - Again on the regression tests, the IBM compiler shows the same problem and furthermore does not accept that the struct: template <class Fsm,class Stt, class Event, class Compile> friend struct dispatch_table can have access to a private method of the befriended class. Again, IIUC, this seems to me to be BOOST_NO_MEMBER_TEMPLATE_FRIENDS. I don't find a file for this compiler in config/compiler. Am I missing something? Frankly, I'm slightly wary of changing myself the config files so I'd really appreciate some help here. Thanks, Christophe