LLVM/Clang 4.0 has dragged on due to unresolved blockers compared to their targeted release date about two weeks ago, but the good news now that after the additional release candidates, the bugs have been resolved.
LLVM 4.0 final along with relevant 4.0 tags for the other sub-projects were made today by Google's Hans Wennborg. There were no changes compared to the recent LLVM 4.0-rc4 milestone.
Hans Wennborg announced this afternoon that the official LLVM 4.0 announcement will go out in a few days once all the packages for the relevant supported platforms/architectures have been created. For features of LLVM 4, see our feature overview.