In response to bug 586652, the "threads" USE flag was added to the libnftnl ebuild, but it's not used anymore since libnftnl-1.0.7 and can be deleted.
The bug has been closed via the following commit(s): https://gitweb.gentoo.org/repo/gentoo.git/commit/?id=3907aa4b9821fc607aa7838202010bb5cc044cb1 commit 3907aa4b9821fc607aa7838202010bb5cc044cb1 Author: Matt Turner <mattst88@gentoo.org> AuthorDate: 2018-09-17 20:53:09 +0000 Commit: Matt Turner <mattst88@gentoo.org> CommitDate: 2018-09-17 20:56:41 +0000 net-libs/libnftnl: add upstream patches to fix endianness issues Also drop the unused USE=threads at the same time for bug 643958. Closes: https://bugs.gentoo.org/640218 Closes: https://bugs.gentoo.org/643958 .../files/libnftnl-1.1.1-big-endian-1.patch | 93 ++++++++++++++++++++++ .../files/libnftnl-1.1.1-big-endian-2.patch | 37 +++++++++ .../files/libnftnl-1.1.1-big-endian-3.patch | 33 ++++++++ net-libs/libnftnl/libnftnl-1.1.1-r1.ebuild | 67 ++++++++++++++++ 4 files changed, 230 insertions(+)