a821 [1] filed a deletion request for libcm [2]: Unmaintained package, no votes, no comments. Broken for ages because of missing package() function.
Last release in 2007. I cannot find references to the software in Gnome's gitlab repos. The first web search result points back to this AUR web page. Safe to delete. [1] https://aur.archlinux.org/account/a821/ [2] https://aur.archlinux.org/pkgbase/libcm/
