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

[amodra at gmail dot com]

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

--- Comment #14 from Alan Modra <amodra at gmail dot com> 2012-04-05 04:00:07 UTC ---
Created attachment 27094
  --> http://gcc.gnu.org/bugzilla/attachment.cgi?id=27094
config patch

Yes, the 32-bit failure seems to be gone if we use the gcc builtin atomics. 
Multiple copies of the testcase have been running now for an hour and half, and
no testsuite regressions with the attached patch.