[Bug libstdc++/42679] RTLD_DEEPBIND dlopen option for shared library that uses libstdc++ std::ostream crashes

["mjtruog at fastmail dot ca" <gcc-bugzilla at gcc dot gnu dot org>]

------- Comment #4 from mjtruog at fastmail dot ca  2010-01-22 07:10 -------
I can help try to determine the problem if you want since it seems everyone is
either busy, doesn't necessarily care right now, or both.  However, if someone
could provide any hints as to what RTLD_DEEPBIND might be doing to libstdc++
internals that is atypical behavior, it would be helpful.  I just suggested
that it might be a design problem since it seems like the problem might have a
broad scope.  I don't wish to suggest that libstdc++ is directly responsible
for no reason.  I was expecting that there was some strange compiler specific
linking going on somewhere but have not set out to try to find anything strange
like that since I assumed other people would have a better idea of what might
be causing the problem.  The problem with RTLD_DEEPBIND might be a new one
since it appeared in glibc 2.3.4.  While the option is not critical, it seems
helpful for keeping dynamic libraries in isolation if it is an N-to-1
relationship where many dynamic libraries are used for a single executable, at
runtime based on runtime events.


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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=42679