[Bug libstdc++/52839] double free or corruption running tr1/.../default_weaktoshared.exe

[redi at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=52839

Jonathan Wakely <redi at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |bkoz at gcc dot gnu.org

--- Comment #24 from Jonathan Wakely <redi at gcc dot gnu.org> 2012-04-11 00:58:17 UTC ---
Benjamin, it seems that the patch for PR 51798 caused this regression and
ABI-incompatible change on 32-bit power, so that the functions in
ext/atomicity.h now use a mutex where they previously used atomic builtins. 
What's the reason for requiring 8-byte compare-and-swap for
_GLIBCXX_ATOMIC_BUILTINS to be defined?