How to use the fbs.freeze.linux.freeze_linux function in fbs

def freeze_fedora(debug=False):
    freeze_linux(debug)
    # Force Fedora to use the system's Gnome libraries. This avoids warnings
    # when starting the app on the command line.
    remove_shared_libraries('libgio-2.0.so.*', 'libglib-2.0.so.*')
    # Fixes for Fedora 29:
    remove_shared_libraries('libfreetype.so.*', 'libssl.so.*')
    # PyInstaller 3.4 includes the library below when on Python 3.6.
    # (Interestingly, it does not package it on Python 3.5.) This leads to a lot
    # of Fontconfig-related errors when starting the frozen app. Further,
    # starting the app takes ages. Removing the library fixes this:
    remove_shared_libraries('libfontconfig.so.*')

def freeze_arch(debug=False):
    freeze_linux(debug)

from fbs.freeze.windows import freeze_windows
            freeze_windows(debug=debug)
            executable += '.exe'
        elif is_linux():
            if is_ubuntu():
                from fbs.freeze.ubuntu import freeze_ubuntu
                freeze_ubuntu(debug=debug)
            elif is_arch_linux():
                from fbs.freeze.arch import freeze_arch
                freeze_arch(debug=debug)
            elif is_fedora():
                from fbs.freeze.fedora import freeze_fedora
                freeze_fedora(debug=debug)
            else:
                from fbs.freeze.linux import freeze_linux
                freeze_linux(debug=debug)
        else:
            raise FbsError('Unsupported OS')
    _LOG.info(
        "Done. You can now run `%s`. If that doesn't work, see "
        "https://build-system.fman.io/troubleshooting.", executable
    )

from fbs.freeze.windows import freeze_windows
            freeze_windows(debug=debug)
            executable += '.exe'
        elif is_linux():
            if is_ubuntu():
                from fbs.freeze.ubuntu import freeze_ubuntu
                freeze_ubuntu(debug=debug)
            elif is_arch_linux():
                from fbs.freeze.arch import freeze_arch
                freeze_arch(debug=debug)
            elif is_fedora():
                from fbs.freeze.fedora import freeze_fedora
                freeze_fedora(debug=debug)
            else:
                from fbs.freeze.linux import freeze_linux
                freeze_linux(debug=debug)
        else:
            raise RuntimeError('Unsupported OS')
    _LOG.info(
        "Done. You can now run `%s`. If that doesn't work, see "
        "https://build-system.fman.io/troubleshooting.", executable
    )

def freeze_ubuntu(debug=False):
    freeze_linux(debug)
    # When we build on Ubuntu on 14.04 and run on 17.10, the app fails to start
    # with the following error:
    #
    #  > This application failed to start because it could not find or load the
    #  > Qt platform plugin "xcb" in "". Available platform plugins are:
    #  > eglfs, linuxfb, minimal, minimalegl, offscreen, vnc, xcb.
    #
    # Interestingly, the error does not occur when building on Ubuntu 16.04.
    # The difference between the two build outputs seems to be
    # libgpg-error.so.0. Removing it fixes the problem:
    remove_shared_libraries('libgpg-error.so.*')
    # libgtk-3.so is present on every Ubuntu system. Make sure we don't ship it
    # to avoid incompatibilities. In particular, running the frozen app with
    # libgtk-3.so from Ubuntu 14 on Ubuntu 16 produces many Gtk warnings
    # "Theme parsing error".
    remove_shared_libraries('libgtk-3.so.*')