Ho già installato questo:
1 core/archlinux-keyring 20170104-1 [installed]
10 blackarch/blackarch-keyring 20140118-3 [installed]
Ma ho ricevuto un errore durante l'aggiornamento libc++abi
da aur:
==> Verifying source file signatures with gpg...
llvm-3.9.1.src.tar.xz ... FAILED (unknown public key 8F0871F202119294)
libcxx-3.9.1.src.tar.xz ... FAILED (unknown public key 8F0871F202119294)
libcxxabi-3.9.1.src.tar.xz ... FAILED (unknown public key 8F0871F202119294)
==> ERROR: One or more PGP signatures could not be verified!
==> ERROR: Makepkg was unable to build libc++.
==> Restart building libc++abi ? [y/N]
Come risolvere questo? (c'è un modo per sapere quale portachiavi dovrei installare per risolvere questo problema?)