3>C:/Qt/6.30/msvc2019_64static/include\QtCore/qmargins.h(536,5): warning : 'tuple_size' defined as a class template here but previously declared as a struct template; this is valid, but may result in linker errors under the Microsoft C++ ABI [-Wmismatched-tags]
3>C:/Qt/6.30/msvc2019_64static/include\QtCore/qmargins.h(538,5): warning : 'tuple_element' defined as a class template here but previously declared as a struct template; this is valid, but may result in linker errors under the Microsoft C++ ABI [-Wmismatched-tags]
3>C:/Qt/6.30/msvc2019_64static/include\QtCore/qmargins.h(540,5): warning : 'tuple_element' defined as a class template here but previously declared as a struct template; this is valid, but may result in linker errors under the Microsoft C++ ABI [-Wmismatched-tags]
3>C:/Qt/6.30/msvc2019_64static/include\QtCore/qmargins.h(542,5): warning : 'tuple_element' defined as a class template here but previously declared as a struct template; this is valid, but may result in linker errors under the Microsoft C++ ABI [-Wmismatched-tags]
3>C:/Qt/6.30/msvc2019_64static/include\QtCore/qmargins.h(544,5): warning : 'tuple_element' defined as a class template here but previously declared as a struct template; this is valid, but may result in linker errors under the Microsoft C++ ABI [-Wmismatched-tags]
3>C:/Qt/6.30/msvc2019_64static/include\QtCore/qmargins.h(547,5): warning : 'tuple_size' defined as a class template here but previously declared as a struct template; this is valid, but may result in linker errors under the Microsoft C++ ABI [-Wmismatched-tags]
3>C:/Qt/6.30/msvc2019_64static/include\QtCore/qmargins.h(549,5): warning : 'tuple_element' defined as a class template here but previously declared as a struct template; this is valid, but may result in linker errors under the Microsoft C++ ABI [-Wmismatched-tags]
3>C:/Qt/6.30/msvc2019_64static/include\QtCore/qmargins.h(551,5): warning : 'tuple_element' defined as a class template here but previously declared as a struct template; this is valid, but may result in linker errors under the Microsoft C++ ABI [-Wmismatched-tags]
3>C:/Qt/6.30/msvc2019_64static/include\QtCore/qmargins.h(553,5): warning : 'tuple_element' defined as a class template here but previously declared as a struct template; this is valid, but may result in linker errors under the Microsoft C++ ABI [-Wmismatched-tags]
3>C:/Qt/6.30/msvc2019_64static/include\QtCore/qmargins.h(555,5): warning : 'tuple_element' defined as a class template here but previously declared as a struct template; this is valid, but may result in linker errors under the Microsoft C++ ABI [-Wmismatched-tags]