The major problem is its installation.
1. Suing shadow building. Configure the building in a side directory.
configure --target xp --prefix the-correct-path-to-install -D _USING_V110_SDK71_
configure --target xp --prefix C:/Qt/5.6.3/msvc2015_xp -D _USING_V110_SDK71_
The correct install path is important, since a qconfig.cpp file would be generated with this path inside.
3. nmake install INSTALL_ROOT=any-directory-you-want
The directory specified in INSTALL_ROOT variable is a temporary location.
4. Copy all things under INSTALL_ROOT/Qt/5.6.3/qtbase/ to your real installation directory.
5. Make a new qt.conf inside installation directory/bin
That’s all. Now you can add this new installation into Qt Creator manually.