Node.js 16 actions are deprecated. Please update the following actions to use Node.js 20: actions/checkout@v3. For more information see: https://github.blog/changelog/2023-09-22-github-actions-transitioning-from-node-16-to-node-20/.

‘constexpr QFlags<T>::QFlags(QFlags<T>::Zero) [with Enum = QwtPlotLayout::Option; QFlags<T>::Zero = int QFlags<QwtPlotLayout::Option>::Private::*]’ is deprecated: Use default constructor instead [-Wdeprecated-declarations]

unused variable ‘md’ [-Wunused-variable]