[Interest] Build Qt itself on Windows 8.1, target Windows >= 7

[Elvis Stansvik]

Hi all,

I'm about to build Qt from source on Windows 8.1 using Visual Studio
2015 Build Tools.

I want the resulting libraries to be usable with Windows >= 7. Do I
need to pass any special configure options for this? I'm thinking of
the _WIN32_WINNT macro [1] which should be set to 0x0601 for Windows 7
compatibility. How do I tell configure to do that? Or do I have to?

Thanks in advance,
Elvis

[1] https://msdn.microsoft.com/en-us/library/6sehtctf.aspx