qt5-llvm-mingw-docker/static/qmake-static

#!/bin/bash

QMAKE_XSPEC=$(qmake -query QMAKE_XSPEC)
if [ "${QMAKE_XSPEC}" == "win32-g++" ]; then
   qmake "$@" LIBS+=-static-libgcc LIBS+=-static-libstdc++
else
   qmake "$@" LIBS+=-static
fi