Some headers are no longer unconditionally included, leading to build failures. http://code.qt.io/cgit/qt/qtbase.git/commit/?id=748836dae80a7d11901f3f0630168829076d11a8 http://code.qt.io/cgit/qt/qtbase.git/commit/?id=000c76ada5cc21479fc479be16a7507fed6490f8 http://code.qt.io/cgit/qt/qtbase.git/commit/?id=058474884c2505a8a00d4c59b4922bfcd3597c2f