MarsSeed [1] filed a deletion request for kate5-syntax-llvm [2]: Orphaned package, last updated in 2018, sources gone. This was only two syntax highlighting definition files for KDE's Kate text editor. They are not needed anymore. Since 1 Jan 2020 Kate has an integrated LSP (Language Server Protocol) client plugin, via which the editor can access helper modules for a large list of programming/markup languages. C/C++ helper is based on LLVM/Clang and it's already configured by default. https://kate-editor.org/post/2020/2020-01-01-kate-lsp-client-status/ Safe to delete this abandoned legacy package. [1] https://aur.archlinux.org/account/MarsSeed/ [2] https://aur.archlinux.org/pkgbase/kate5-syntax-llvm/