MarsSeed [1] filed a deletion request for lib32-libprotobuf [2]: I suggest it's safe to delete this orphaned 32-bit library. Unmaintained for almost 4 years. There are some issues with its build as well, it directly downloads gmock-1.7.0 library (last released and discontinued in 2014). It also builds insecure library files by explicitly disabling relro. Safe to delete, nothing in AUR depends on it. For the off-chance somebody might want some 32-bit tool to use libprotopbuf, there is a git package for the same in AUR, one which builds a working and up-to-date version: https://aur.archlinux.org/packages/lib32-libprotobuf-git [1] https://aur.archlinux.org/account/MarsSeed/ [2] https://aur.archlinux.org/pkgbase/lib32-libprotobuf/