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| author | Naveen N Rao <naveen@kernel.org> | 2023-05-30 11:44:36 +0530 |
|---|---|---|
| committer | Michael Ellerman <mpe@ellerman.id.au> | 2023-06-27 16:19:06 +1000 |
| commit | 25ea739ea1d4d3de41acc4f4eb2d1a97eee0eb75 (patch) | |
| tree | c132cee36129c7223b6306f890f58c53d92be310 /scripts/Makefile.compiler | |
| parent | d61cd13e732c0eaa7d66b45edb2d0de8eab65a1e (diff) | |
powerpc: Fail build if using recordmcount with binutils v2.37
binutils v2.37 drops unused section symbols, which prevents recordmcount
from capturing mcount locations in sections that have no non-weak
symbols. This results in a build failure with a message such as:
Cannot find symbol for section 12: .text.perf_callchain_kernel.
kernel/events/callchain.o: failed
The change to binutils was reverted for v2.38, so this behavior is
specific to binutils v2.37:
https://sourceware.org/git/?p=binutils-gdb.git;a=commit;h=c09c8b42021180eee9495bd50d8b35e683d3901b
Objtool is able to cope with such sections, so this issue is specific to
recordmcount.
Fail the build and print a warning if binutils v2.37 is detected and if
we are using recordmcount.
Cc: stable@vger.kernel.org
Suggested-by: Joel Stanley <joel@jms.id.au>
Signed-off-by: Naveen N Rao <naveen@kernel.org>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://msgid.link/20230530061436.56925-1-naveen@kernel.org
Diffstat (limited to 'scripts/Makefile.compiler')
0 files changed, 0 insertions, 0 deletions