‘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]

‘width’ may be used uninitialized in this function [-Wmaybe-uninitialized]

‘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]

‘unsigned char __atomic_load_1(const volatile void*, int)’ writing 1 byte into a region of size 0 overflows the destination [-Wstringop-overflow=]

‘unsigned int __atomic_load_4(const volatile void*, int)’ writing 4 bytes into a region of size 0 overflows the destination [-Wstringop-overflow=]

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

‘unsigned char __atomic_load_1(const volatile void*, int)’ writing 1 byte into a region of size 0 overflows the destination [-Wstringop-overflow=]

‘unsigned int __atomic_load_4(const volatile void*, int)’ writing 4 bytes into a region of size 0 overflows the destination [-Wstringop-overflow=]

‘width’ may be used uninitialized [-Wmaybe-uninitialized]