** Changed in: linux (Ubuntu Xenial)
Status: In Progress => Fix Committed
** Changed in: linux (Ubuntu Artful)
Status: In Progress => Fix Committed
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https://bugs.launchpad.net/bugs/1748922
Title:
linux-tools: perf incorrectly linking libbfd
Status in linux package in Ubuntu:
Fix Released
Status in linux source package in Xenial:
Fix Committed
Status in linux source package in Artful:
Fix Committed
Bug description:
Under bug #783660 we switched away from linking libbfd and switched to
using libiberty to demangle C++ names. Somewhere between precise and
development upstream changed the order in which the tests are
performed and triggered us to start linking against it again.
= SRU Justification (for Artful/Xenial) =
Impact: Linking perf (part of the linux-tools package) against libbfd
prevents users to have linux-tools of different kernel versions
installed in parallel. Which makes debugging hard.
Fix: As stated above this had been fixed before but upstream changes
of the kernel between 3.2 and 4.4 voided those fixes. Unfortunately
without causing build failures but causing libbfd to be used again.
This has already been fixed up in Bionic. The first of the two patches
needs a backport for Xenial to make up for a file rename. The second
can be picked into both releases.
Testcase: Extracting ./usr/lib/linux-tools-*/perf from the generated
linux-tools package and inspecting it with ldd. Old builds will have a
reference to libbfd, the test builds did no longer.
Risk of regression: low (change of build option which has been done
before and also for some time in Bionic).
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