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** Changed in: linux (Ubuntu)
Status: New => Incomplete
** Tags added: focal
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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
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