Good stuff @Jens Glathe! I recommend everyone stuck to just build it and they'll see it work perhaps even better than before, especially if you start natively optimising the build against your hardware. Your OS kernel will make your system feel and run snappier!
This is my build command post configuration (GCC)... $ time KCFLAGS="-march=native -msse2avx -pipe -O3" KCPPFLAGS="-march=native -msse2avx -pipe -O3" make -j$(( $(nproc) + 1 )) deb-pkg LOCALVERSION=-danglingpointer-zen3-optimised This is my build command post CLANG configuration with LTO... time KCFLAGS="-march=native -pipe -O3" KCPPFLAGS="-march=native -pipe -O3" make -j$(( $(nproc) + 1 )) LLVM=1 LLVM_IAS=1 deb-pkg LOCALVERSION=-danglingpointer-zen3-clang-ltothin For Clang LTO=thin you will need to configure for it. 1) prep the config using the config from Ubuntu Mainline. Basically just copy it and then $ make olddefconfig 2) scripts/config -e LTO_CLANG_THIN 3) run the clang make command above with KCFLAGS. Check phoronix for GCC(all versions) vs CLANG-12 Only problem I have with CLANG is that it can bugger up any DKMS programs you may have. Virtualbox is an example which is geared towards GCC. I have CLANG built linux kernels running everywhere except wherever I have Virtualbox. There I use GCC-11. -- 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
