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[Bug 2111265] Re: migrate mesa to llvm 20.1.2 or newer

 

Hello Timo, or anyone else affected,

Accepted llvm-toolchain-20 into noble-proposed. The package will build
now and be available at https://launchpad.net/ubuntu/+source/llvm-
toolchain-20/1:20.1.2-0ubuntu1~24.04.1 in a few hours, and then in the
-proposed repository.

Please help us by testing this new package.  See
https://wiki.ubuntu.com/Testing/EnableProposed for documentation on how
to enable and use -proposed.  Your feedback will aid us getting this
update out to other Ubuntu users.

If this package fixes the bug for you, please add a comment to this bug,
mentioning the version of the package you tested, what testing has been
performed on the package and change the tag from verification-needed-
noble to verification-done-noble. If it does not fix the bug for you,
please add a comment stating that, and change the tag to verification-
failed-noble. In either case, without details of your testing we will
not be able to proceed.

Further information regarding the verification process can be found at
https://wiki.ubuntu.com/QATeam/PerformingSRUVerification .  Thank you in
advance for helping!

N.B. The updated package will be released to -updates after the bug(s)
fixed by this package have been verified and the package has been in
-proposed for a minimum of 7 days.

** Changed in: llvm-toolchain-20 (Ubuntu Noble)
       Status: New => Fix Committed

** Tags added: verification-needed-noble

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https://bugs.launchpad.net/bugs/2111265

Title:
  migrate mesa to llvm 20.1.2 or newer

Status in llvm-toolchain-20 package in Ubuntu:
  Invalid
Status in mesa package in Ubuntu:
  Fix Released
Status in spirv-llvm-translator-20 package in Ubuntu:
  Invalid
Status in llvm-toolchain-20 source package in Noble:
  Fix Committed
Status in mesa source package in Noble:
  New
Status in spirv-llvm-translator-20 source package in Noble:
  Fix Committed
Status in llvm-toolchain-20 source package in Plucky:
  Fix Released
Status in mesa source package in Plucky:
  Fix Committed
Status in spirv-llvm-translator-20 source package in Plucky:
  Fix Released

Bug description:
  [Impact]

  This is needed for some new AMD RDNA4 platforms that require the newer
  llvm for runtime shader compilation.

  Skipping oracular, as it is going to be EOL soon.

  Note that llvm-toolchain-20 needs to be built twice on noble, first
  without llvm-spirv-20 which doesn't exist yet, and then after spirv-
  llvm-translator-20 has built, it's built a second time *with* llvm-
  spirv-20 which is needed to build libclc-20 which Mesa needs.

  [Test case]

  Install updates, check that drivers that require llvm still work,
  including swrast (llvmpipe), radeonsi.

  Test with normal desktop usage, glxgears, glmark2, Unigine demos. That
  should give enough confidence that things still work.

  [Where things could go wrong]

  The new llvm version might result in buggy behaviour with the
  swrast/radeonsi drivers.

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References