This bug was fixed in the package libvirt - 3.6.0-1ubuntu5
--------------- libvirt (3.6.0-1ubuntu5) artful; urgency=medium
* d/p/u/gnulib-getopt-posix-Fix-build-failure-when-using-ac_cv_head.patch: fix FTBFS with glibc 2.26 (LP: #1718668)
-- Christian Ehrhardt <email address hidden> Thu, 28 Sep 2017 08:18:10 -0400
This bug was fixed in the package libvirt - 3.6.0-1ubuntu5
---------------
libvirt (3.6.0-1ubuntu5) artful; urgency=medium
* d/p/u/gnulib- getopt- posix-Fix- build-failure- when-using- ac_cv_head. patch:
fix FTBFS with glibc 2.26 (LP: #1718668)
-- Christian Ehrhardt <email address hidden> Thu, 28 Sep 2017 08:18:10 -0400