Jristz  filed a orphan request for xdelta :
Maintainer fal to se coments about the glib issue, also fail to track glib movements (glib is makedeps since forever and he never add it to the makedep)
so I think someone could do a better job or at less update acordly better.
 https://aur.archlinux.org/account/Jristz/  https://aur.archlinux.org/pkgbase/xdelta/
Request #5759 has been accepted by xyproto :
The user xyproto disowned the package.