Bumping the baseline on ppc64el in jammy to POWER9

Matthias Klose doko at ubuntu.com
Thu Dec 9 13:25:03 UTC 2021

This weekend, we will bump the baseline for the ppc64el architecture to POWER9.
A test compiler (gcc-11) for jammy can be found at


We will not do an explicit test rebuild for that change, but do the first test
rebuild during the Xmas/New Year breaks with this p9 default.  If bugs are found
with these defaults,

 - fix the bug if possible

 - file a bug report with the tag "power9"

 - if a fix is urgently needed, file the bug report as
   above, and then upload the package with a workaround
   defaulting to the previous baseline:

     -march=power8 -mtune=power9


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