On Windows, when building using Unity Build, min/max macro form `window.h` makes it to some files, and messes up evaluation of code like `std::numeric_limits<T>::max()` which leads to compilation error. We don't use min/max macros in Qt base, and it might be the time to pass NOMINMAX to our targets. Pick-to: 6.5 Task-number: QTBUG-109394 Change-Id: Ia1ff5de36538075264c8556ef3b0416f3c15168c Reviewed-by: Mårten Nordheim <marten.nordheim@qt.io> Reviewed-by: Thiago Macieira <thiago.macieira@intel.com> Reviewed-by: Alexey Edelev <alexey.edelev@qt.io> Reviewed-by: Joerg Bornemann <joerg.bornemann@qt.io>