tar:gnupg:on:required::
tar:smgl-fhs:on:required::
tar:acl:off:optional:--enable-acl:--disable-acl
tar:attr:off:optional:--with-xattrs:--without-xattrs
tar:gettext:on:optional:--enable-nls:--disable-nls
tar:xz-utils(LZMA):on:optional::
