https://github.com/darkmattercoder/qt-build
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echo 'override MXE_PLUGIN_DIRS += plugins/gcc7' >> settings.mk
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qt5
qtbase qtcharts qtdeclarative qtquickcontrols qtquickcontrols2
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https://github.com/qt/qtbase/blob/dev/src/network/kernel/qurltlds_p.h
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ln -s /opt/mxe/usr/bin/x86_64-w64-mingw32.static-cmake /usr/bin/cmake
ENV CMAKE_PREFIX_PATH="/opt/mxe/usr/x86_64-w64-mingw32.static/qt5"
---