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

[redi at gcc dot gnu.org]

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

--- Comment #50 from Jonathan Wakely <redi at gcc dot gnu.org> 2012-02-03 17:52:39 UTC ---
(In reply to comment #48)
> (In reply to comment #46)
> 
> Actually, using -mmacosx-version-min=10.6
> --sysroot=/Developer/SDKs/MacOSX10.6.sdk doesn't work as you end up with the
> error...

Please file a separate bug for that.

This is just another example of libstdc++ assuming that the environment it sees
at configure time is the same as it will see when being used.