cd ~/Qt5static/5.14.2/build; ~/Qt5static/5.14.2/src/configure -v -static -release -ltcg -optimize-size -no-pch -prefix ~/Qt5static/5.14.2/ -qt-zlib -qt-pcre -qt-libpng -qt-libjpeg -qt-freetype -qt-xcb -qt-harfbuzz -make libs -nomake tools -nomake examples -nomake tests -opensource -confirm-license -skip qtwebengine -dbus-linked -no-rpath -openssl-linked -opengl desktop -sysconfdir "/etc/xdg" -no-qml-debug -feature-freetype -fontconfig -feature-relocatable -strip

• https://www.foxoman.net/compile-static-qt-build-in-ubuntu-optimized-for-small-size-with-appimage-support