[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 #26 from Jack Howarth <howarth at nitro dot med.uc.edu> 2012-01-31 
01:05:15 UTC ---
Created attachment 26525
  --> http://gcc.gnu.org/bugzilla/attachment.cgi?id=26525
preprocessed source from FSF gcc 4.7 for pthread test code