Thanks for tryting LinuxCNC on aarch64. I don't know of anyone presently using such a configuration.
As far as the "undefined symbol" message: Please check whether in "wish", it works to "package require Img" or whether the same error occurs. If it's the same error then may point to a general problem between libtk-img and libtiff. As far as the "LIBGL: Error while gathering supported extension (eglInitialize: EGL_BAD_DISPLAY), default to none" message: Most UIs for LinuxCNC require working OpenGL. You can try a different UI such as tklinuxcnc, it doesn't use OpenGL and probably also doesn't use Img. However, it's much less friendly (IMO) Jeff
