http://gcc.gnu.org/bugzilla/show_bug.cgi?id=50348
--- Comment #4 from Pawel Sikora <pluto at agmk dot net> 2011-09-22 11:23:14 UTC --- (In reply to comment #3) > I think that, unless not imposed by the standard (why??) the visibility of > "namespace std" SHALL NOT BE forced to default part of the std:: (exceptions typeinfo symbols) must be visible-by-default for proper throw-catch/dynamic_cast working across shared libs boundaries.