The problem is rather the opposite; the aufs in the kernel is newer than the synced aufs-tools. And I just recently found out that aufs for 5.x kernels is hosted in a different git repository, which explains why we haven't been seeing any tags for 5.x kernels (and thus the version is still 4.x-rcN).
For focal then we likely need to update aufs-tools from https://github.com/sfjro/aufs5-standalone and update aufs-tools every time we update the kernel support. However, if the tools and kernel support really are version locked as this build error implies, that seems to pose a problem for hwe kernels. -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1851447 Title: aufs-tools 4.14 FTBFS because of wrong SAUCE driver in the kernel Status in linux package in Ubuntu: Confirmed Bug description: The latest aufs-tools package synced from Debian fails to build in Ubuntu (but not in Debian) because the Ubuntu kernel package has aufs sauce patches and they are not at a compatible version. [...] dh_auto_install install -d /<<BUILDDIR>>/aufs-tools-4.14\+20190211/debian/aufs-tools make -j4 install DESTDIR=/<<BUILDDIR>>/aufs-tools-4.14\+20190211/debian/aufs-tools AM_UPDATE_INFO_DIR=no "INSTALL=install --strip-program=true" make: Entering directory '/<<BUILDDIR>>/aufs-tools-4.14+20190211' cc -g -O2 -fdebug-prefix-map=/<<BUILDDIR>>/aufs-tools-4.14+20190211=. -fstack-protector-strong -Wformat -Werror=format-security -O -Wall -Wdate-time -D_FORTIFY_SOURCE=2 -D_GNU_SOURCE -I./libau -DAUFHSM_CMD=\"/usr/bin/aufhsm\" -DMOUNT_CMD=\"/bin/mount\" -DUMOUNT_CMD=\"/bin/umount\" -Wl,-Bsymbolic-functions -Wl,-z,relro -Wl,-z,now ver.c -o ver ./ver Wrong version! aufs-util for aufs4.14 20190211, but aufs is 4.x-rcN-20190805. See README in detail and try git branch -a. make: *** [Makefile:120: ver_test] Error 255 rm ver [...] (https://launchpad.net/ubuntu/+source/aufs- tools/1:4.14+20190211-1/+build/17953990) Please either update the aufs patches in the kernel tree, or else drop them. (My understanding is that we probably don't want to drop them because docker may use aufs as a backend; and while this is deprecated, there is currently no upgrade story for users currently using it.) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1851447/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : email@example.com Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp