Clang 13 documentation https://clang.llvm.org/docs/ReleaseNotes.html indicates support of [[clang::musttail]] attributes to enforce TCO.
Any attempt to use this in xcode13 is is failing on the attribute:
warning: unknown attribute 'musttail' ignored [-Wunknown-attributes] [[clang::musttail]]
Can I get a confirmation this is actually supported?
Clang version in xCode13b4 is reported as:
Apple clang version 13.0.0 (clang-1300.0.27.3)
