This has been applied to Disco (and I believe to Eoan, too) but the bug
reference was pointing to a different bug (just libbfd and libbfp
looking too similar to notice): bug #1826410. This will require some
care to untangle without requiring to do the kernel again.
** Changed in: linux (Ubuntu Disco)
Status: Confirmed => Fix Committed
** Changed in: linux (Ubuntu Eoan)
Status: Confirmed => Fix Committed
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https://bugs.launchpad.net/bugs/1828234
Title:
linux-tools: perf incorrectly linking libbfd -- again
Status in linux package in Ubuntu:
Fix Committed
Status in linux source package in Disco:
Fix Committed
Status in linux source package in Eoan:
Fix Committed
Bug description:
= SRU Justification =
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 4.19 and 5.0 voided those fixes. Unfortunately
without causing build failures but causing libbfd to be used again.
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 will not.
Risk of regression: low as this is a build-time change.
=====
It seems the previous attempt to disable use of libbfd has been
rendered ineffective by an upstream change:
commit 14541b1e7e723859ff2c75c6fc10cdbbec6b8c34
Author: Stanislav Fomichev <[email protected]>
Date: Thu Nov 15 16:32:01 2018 -0800
perf build: Don't unconditionally link the libbfd feature test to
-liberty and -lz
This leads us to have a hard dependency on libbfd at a specific minor
version. We do not need this library, we can use libiberty and others
for the same functions in perf.
This is a recurrance of Bug #1748922.
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