Thanks to this "bug", yes it IS a"bug"; thousands of ubuntu users have learnt to compile mainline kernels!
I never had to compile a linux kernel until this happened to 5.11.17+! I've always just installed whatever the mainline kernel team built. The silver lining here is that my ivy-bridge servers are all now running way more efficient and faster with aggressive optimisations like what I posted previously on this thread! Thus delaying the need to replace them all for a few more years yet! Recently (yesterday) I ditched the GNU build utils and gcc/g++ and switched to llvm-12, clang-12, and ld.lld-12 and enabled thin-LTO along with the same aggressive optimisations I posted previously in my KCFLAGS and KCPPFLAGS; and now it is even more snappier! I would never have learnt how to do all of the above if it weren't for this "bug", and honestly don't see myself ever using the ubuntu mainline kernels ever again except for copying their ".config" file to prime my builds and ensure hardwares are enabled. Thank you bug; all my servers are way faster now! Now I itch to compile even more stuff that I use daily that's open source so I can aggressively optimise them and squeeze more juice out of my setup! -- 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/1926938 Title: Recent mainline packages are built with Hirsuite 21.04, not Focal 20.04 LTS Status in linux package in Ubuntu: Confirmed Bug description: Hi all, The Mainline wiki states that the mainline kernels are built with the previous LTS toolchain, but the recent 5.12.x and 5.11.x releases are being built with Hirsuite 21.04, and before that Groovy? If this is intentional, then the wiki should be updated to reflect the change in policy. From https://wiki.ubuntu.com/Kernel/MainlineBuilds Mainline kernel build toolchain These kernels are built with the toolchain (gcc, g++, etc.) from the previous Ubuntu LTS release. (e.g. Ubuntu 14.04 "Trusty Tahr" / 16.04 "Xenial Xerus" / 18.04 "Bionic Beaver", etc.) Therefore, out-of-tree kernel modules you already have built and installed for use with your release kernels are not likely to work with the mainline builds. The 5.12 kernel was built with GCC 10.3.0, and 5.11.16 with 10.2.0. On my Focal LTS system I have GCC 9.3.0. The Mainline kernel build toolchain These kernels are built with the toolchain (gcc, g++, etc.) from the previous Ubuntu LTS release. (e.g. Ubuntu 14.04 "Trusty Tahr" / 16.04 "Xenial Xerus" / 18.04 "Bionic Beaver", etc.) Therefore, out-of-tree kernel modules you already have built and installed for use with your release kernels are not likely to work with the mainline builds. The *linux-headers-generic* packages have unmet dependencies on 20.04 LTS. I could install Groovy built kernels fine, but the Hirsuite ones built with GCC 10.3.0 appear to require libc6 >= 2.33. So the new kernels can't be installed on Focal (libc 2.31). Thanks, Mark To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1926938/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : kernel-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp
