[Bug 1930086] Re: [22.04 FEAT] gcc tunings for power9

[Andrew Cloke]

** Changed in: gcc-defaults (Ubuntu)
       Status: New => In Progress

** Changed in: ubuntu-power-systems
       Status: New => In Progress

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Title:
  [22.04 FEAT] gcc tunings for power9

Status in The Ubuntu-power-systems project:
  In Progress
Status in gcc-defaults package in Ubuntu:
  In Progress
Status in linux package in Ubuntu:
  Incomplete

Bug description:
  This is an Ubuntu-power-systems 22.04 LTS feature bug to track
  changing the gcc configure options from --with-cpu=power8 to --with-
  cpu=power9.

  Prerequisites for this bug include power9 builder hardware in
  Canonical datacenter.

  I'm still learning my way around Debian/Ubuntu source so go easy on me
  if this isn't the correct branch:

  https://salsa.debian.org/toolchain-
  team/gcc/-/blob/gcc-10-debian/debian/rules2#L394

  But we'll want to add some logic around line 394 to add --with-
  cpu=power9 for 22.04 and possibly --with-tune=? but I'll reverse
  mirror this bug and verify with our IBM Power toolchain architect.

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