- Download and extract Qt 5.6.2 from https://download.qt.io/official_releases/qt/5.6/5.6.2/single/.
- Windows: edit [Qt]/qtbase/mkspecs/common/msvc-desktop.conf by replacing:
QMAKE_CFLAGS_RELEASE = -O2 -MD
QMAKE_CFLAGS_RELEASE_WITH_DEBUGINFO += -O2 -MD -Zi
QMAKE_CFLAGS_DEBUG = -Zi -MDd