Replace const by constexpr when the value of the variable can be calculated at compile-time. Fixes: QTBUG-108859 Pick-to: 6.5 Change-Id: I4abf5162d521fc5dca0286a6254f86c57a473367 Reviewed-by: Ivan Solovev <ivan.solovev@qt.io> (cherry picked from commit c4a1c171a3b2ade21a344de99962b3848e4ad85a) Reviewed-by: Qt Cherry-pick Bot <cherrypick_bot@qt-project.org>