If yasm is installed the you can an optimized intel optimized crc32c implementation: https://github.com/ceph/ceph/commit/e55809acd2d469ce1ecdf6cf2858711c904d02af It shows up like this in the build log: checking for yasm... yes we have a modern and working yasm we are x86_64 we are not x32 yasm can also build the isa-l stuff
The bug has been closed via the following commit(s): https://gitweb.gentoo.org/repo/gentoo.git/commit/?id=eb721eb425537a048d49886e80998d100bd06759 commit eb721eb425537a048d49886e80998d100bd06759 Author: Patrick McLean <chutzpah@gentoo.org> AuthorDate: 2017-12-23 19:59:29 +0000 Commit: Patrick McLean <chutzpah@gentoo.org> CommitDate: 2017-12-23 19:59:47 +0000 sys-cluster/ceph: Revision bump to 10.2.10-r1, add yasm DEPEND (bug #642068) Closes: https://bugs.gentoo.org/642068 Package-Manager: Portage-2.3.19, Repoman-2.3.6 sys-cluster/ceph/ceph-10.2.10-r1.ebuild | 306 ++++++++++++++++++++++++++++++++ 1 file changed, 306 insertions(+)