Don't warn about CMP0156 policy values for platforms we don't require them for, which are Apple and Emscripten. This avoids scaring project developers unnecessarily and forcing them to set the policy to OLD / NEW explicitly. Effectively this means we don't force the policy anymore to OLD if cmake_minimum_required is 3.29 or higher on non-Apple and non-Emscripten platforms. CMake is smart enough to do de-duplication of libraries on platforms or linkers that don't support it. Amends c20d7bcb86361d0c9f8af3807dcad9db1a3a5ca0 Amends d6d832d0d28ac29807a04f6634a20e12649b440d [ChangeLog][Build Systems] CMake user projects will now use CMake's default value for the CMP0156 policy, except for Apple and Emscripten platforms which are forced to NEW (when the policy is available). Pick-to: 6.8 6.10 Fixes: QTBUG-141181 Task-number: QTBUG-135978 Task-number: QTBUG-140211 Change-Id: I44d65537a6ca38fdc16bf42088e18f2690f0adbf Reviewed-by: Joerg Bornemann <joerg.bornemann@qt.io>