[Bug c++/54601] AIX uses atexit which causes unloading of shared modules to break

[dje at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=54601

--- Comment #7 from David Edelsohn <dje at gcc dot gnu.org> 2013-01-30 16:59:13 UTC ---
Created attachment 29307
  --> http://gcc.gnu.org/bugzilla/attachment.cgi?id=29307
cxa_atexit implementation in libgcc

This version of the patch implements __cxa_atexit and __cxa_finalize in libgcc,
not libsupc++, with no modifications to collect2.  I am not sure if using a low
priority C destructor to run __cxa_finalize early in the destructor list is
correct. The original collect2 patch ran it last, after other destructors,
which I believe is incorrect and does not match crtstuff.c semantics for ELF. 
When I configured GCC with the patch and --enable__cxa-atexit, I saw a few
additional C++ errors in the testsuite.