Changelog for libcxxabi-3.9.0-1.fc26.x86_64.rpm :

* Mon Feb 20 2017 Tom Callaway - 3.9.0-1- update to 3.9.0- apply fixes from libcxx
* Wed Sep 07 2016 Tom Callaway - 3.8.1-1- update to 3.8.1
* Mon Jul 25 2016 Tom Callaway - 3.8.0-2- make static subpackage
* Tue May 03 2016 Tom Callaway - 3.8.0-1- initial package