[libvirt] Bump tar format?

Hi everyone, commit cc3d52e[1] has apparently broken 'make dist' for at least some platforms: Fedora 20 is fine[2], but both Fedora 21 and rawhide[3][4] are currently failing. My laptop is running Fedora 22 and can make dist just fine, which is of course very confusing. The issue is caused by the following tar error: tar: libvirt-1.2.18/tests/nodeinfodata/linux-deconfigured-cpus/ \ node/node0/cpu16/topology/core_siblings_list: \ link name is too long; not dumped There seem to be basically two ways to solve the failure: 1. rename the test case, making it shorter; 2. bump tar format from ustar, which has limitations on the length of file names, to posix/pax, which has no such limitations. I'm not a fan of the former option because short names are usually very opaque, see tests/nodeinfodata/linux-test[0-8] for some perfect examples. On the other hand, I'm not sure whether bumping the tar version would affect portability in a significant way: the automake documentation[5] reports that this format is very young and should probably be restricted to packages that target only very modern platforms but the GNU tar documentation[6], while containing some warnings as well, suggest that this format is going to become the default. Any suggestions on how to proceed? Cheers. [1] https://www.redhat.com/archives/libvir-list/2015-July/msg00662.html [2] https://ci.centos.org/view/libvirt-project/job/libvirt-daemon -rpm/systems=libvirt-fedora-20/327/ [3] https://ci.centos.org/view/libvirt-project/job/libvirt-daemon -rpm/systems=libvirt-fedora-21/327/ [4] https://ci.centos.org/view/libvirt-project/job/libvirt-daemon -rpm/systems=libvirt-fedora-rawhide/327/ [5] https://www.gnu.org/software/automake/manual/html_node/List-of -Automake-options.html [6] http://www.gnu.org/software/tar/manual/html_chapter/tar_8.html -- Andrea Bolognani Software Engineer - Virtualization Team