[Bug libstdc++/51906] thread lock test failures on darwin11 under Xcode 4.2

[howarth at nitro dot med.uc.edu]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=51906

--- Comment #10 from Jack Howarth <howarth at nitro dot med.uc.edu> 2012-01-28 
16:48:37 UTC ---
Created attachment 26491
  --> http://gcc.gnu.org/bugzilla/attachment.cgi?id=26491
preprocessed source for   libstdc++-v3/testsuite/30_threads/try_lock/3.cc
generated with Xcode 4.2.1 on Lion