[Bug 1629989] Re: FFe: Sync libpfm4 4.7.0+git30-gd422ba2-1 (main) from Debian unstable (main)

[Steve Langasek]

The new libpfm4 version seems to include changes besides just adding new
code for enabling the new CPUs, and it's non-trivial to see from source
review what impact this may have on existing uses.  Could we have some
analysis of these changes, and their potential risk to the release?

There's also this packaging change:

+# see FEATURE AREAS in dpkg-buildflags(1)
+export DEB_BUILD_MAINT_OPTIONS = hardening=+all,-pie

This explicitly disables PIE, which is enabled by default on amd64 and
s390x in yakkety.  Why should we want to disable PIE?  There's no
explanation in the debian changelog.

** Changed in: libpfm4 (Ubuntu)
       Status: New => Incomplete

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Title:
  FFe: Sync libpfm4 4.7.0+git30-gd422ba2-1 (main) from Debian unstable
  (main)

Status in libpfm4 package in Ubuntu:
  Incomplete
Status in papi package in Ubuntu:
  Triaged

Bug description:
  Please sync libpfm4 4.7.0+git30-gd422ba2-1 (main) from Debian unstable
  (main)

  Explanation of FeatureFreeze exception:
  Request from Debian maintainer, enables support for latest Intel CPUs, including Knights Landing.

  Changelog entries since current yakkety version
  4.7.0+git11-gbfb9baf-1:

  libpfm4 (4.7.0+git30-gd422ba2-1) unstable; urgency=medium

    * New upstream GIT snapshot.
    * Overhaul buildflags usage and enable more hardening.
    * Fix i386 (cross-)build with x86_64 uname.
    * typos.patch: Fix some more typos.

   -- Andreas Beckmann <anbe at debian.org>  Mon, 19 Sep 2016 02:21:25
  +0200

  Also, please sync papi 5.5.0-2 (universe) from Debian unstable (main)

  Changelog entries since current yakkety version 5.4.3-3:

  papi (5.5.0-2) unstable; urgency=medium

    * Fix upgrade from jessie with Breaks+Replaces: libpapi5.3.
    * Fix build on hppa, thanks to Helge Deller.  (Closes: #838321)

   -- Andreas Beckmann <anbe at debian.org>  Fri, 23 Sep 2016 12:14:28
  +0200

  papi (5.5.0-1) unstable; urgency=medium

    * New upstream release.
    * Refresh patches.
    * fix-typos.patch: Fix some more typos.
    * Bump libpfm4-dev B-D to >= 4.7.0+git30.
    * Restore reproducibility.
    * Upload to unstable.

   -- Andreas Beckmann <anbe at debian.org>  Mon, 19 Sep 2016 09:40:23
  +0200

  papi (5.4.3-4) experimental; urgency=medium

    * Upstream has clarified what composes the library API.
    * Soversion change: 5.4.3 -> 5. Rename package libpapi5.4.3 to libpapi5.
    * Drop support for changing the Soversion frequently.
    * Overhaul buildflags usage and enable more hardening.
    * Upload to experimental.

   -- Andreas Beckmann <anbe at debian.org>  Sun, 29 May 2016 10:39:59
  +0200

  All reverse-dependencies built in my PPA, except eztrace-contrib on
  amd64, due to LP: #1629274.

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