mkroening [1] filed a deletion request for riscv64-unknown-elf-gdb [2]: As noted in the pinned comment, this package is equivalent to [`riscv64-elf- gdb`](https://archlinux.org/packages/community/x86_64/riscv64-elf- gdb/) from Community:
```bash $ ./config.sub riscv64-elf riscv64-unknown-elf ``` [1] https://aur.archlinux.org/account/mkroening/ [2] https://aur.archlinux.org/pkgbase/riscv64-unknown-elf-gdb/
