optional_depends libcap '' '' 'Linux Capability support' &&
optional_depends gnutls '' '' 'GnuTLS support in ping6' &&
optional_depends opensp '' '' 'for docs and manpages' &&
optional_depends sgmlspm '' '' 'for docs and manpages' &&
optional_depends docbook-sgml-dtd '' '' 'for docs and manpages'
