grawlinson [1] filed a request to merge libpfm4 [2] into libpfm [3]: It's much better to rename this to libpfm, as v3 is long deprecated.
[1] https://aur.archlinux.org/account/grawlinson/ [2] https://aur.archlinux.org/pkgbase/libpfm4/ [3] https://aur.archlinux.org/pkgbase/libpfm/
