Qt Workshop qmake install

linux-g++ {
    PREFIX = /usr

    BINDIR = $$PREFIX/bin
    DATADIR = $$PREFIX/share

    INSTALLS += target desktop icon

    target.path = $$BINDIR

    desktop.path = $$DATADIR/applications
    desktop.files += myapp.desktop

    icon.path = $$DATADIR/icons/hicolor/48x48/apps
    icon.files += myapp.png
}