Clang's macro deprecation pragma was introduced in Clang 14, shipped with Xcode 14.0. We can't version check Q_CC_CLANG here, as qcompilerdetection.h hasn't been included at this point. Nor would it have helped much, as we would have had to do so for each individual define we wanted to deprecate, since mentioning an undefined define in the deprecation pragma is an error. And we can't wrap the pragma in another macro that conditionally expands to _Pragma either, as the input argument is a define that needs to be passed on as is, without expanding it. So the simplest way to support < Xcode 14 is just to silence the unknown pragma warning. Pick-to: 6.6 Change-Id: Icf95042e6186deb212cd1793eb12ba32206ce34b Reviewed-by: Thiago Macieira <thiago.macieira@intel.com>