1.) The ebuild contains the line use nls || myconf=( --disable-nls ) The = must be a +=. 2.) The ebuild contains the line use acl || myconf+=( --disable-ea-support ) This is logically wrong. acl's are one possible use of ea's, but not the only one. My system has no acl support at all (hence USE=-acl), but the filesystems have ea's, because XATTR_PAX markings are stored in ea's, independent of acl's, and these ea's must be preserved by backup & restore, otherwise a restored system won't boot. I think there must be a separate USE flag for switching ea's on or off.
commit 91bc8791afa4743a50bc0283e626bb3035202569 Author: Lars Wendler <polynomial-c@gentoo.org> Date: Wed Aug 17 22:00:38 2016 app-backup/dar: Revbump to fix ebuild problems (bug #591538). Renamed "acl" USE flag to "xattr". Thanks to Klaus Kusche for reporting these issues. Package-Manager: portage-2.3.0 Signed-off-by: Lars Wendler <polynomial-c@gentoo.org>
