Sorry for the duplicate posting but the last seemed to go out empty.
With the release of Xcode 4.2, we will have to be alert to package breakage
due to the newly enabled TLS support in clang under darwin11. This issue only
occurs on the darwin11 SDK using llvm.org's clang 2.9 or svn under Xcode
When Xcode 4.2 is released, we will need to be alert for new build problems
on 10.7 stable. The Xcode 4.2's clang compilers now use the new TLS support
in the darwin11 SDK (which wasn't the case for Xcode 4.1). This has already
been discovered to break libmpfr4. If your package fails to pass it's
