linux-kernel - Re: [Regression in 6.19-rc6] Build breakage after commit 436326bc525d

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Message-ID: <aW_j_aqyipRqtupO@laps>
Date: Tue, 20 Jan 2026 15:22:21 -0500
From: Sasha Levin <sashal@...nel.org>
To: "Rafael J. Wysocki" <rafael@...nel.org>
Cc: Peter Zijlstra <peterz@...radead.org>,
	Josh Poimboeuf <jpoimboe@...hat.com>,
	Arnaldo Carvalho de Melo <acme@...nel.org>,
	the arch/x86 maintainers <x86@...nel.org>,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	Linux regressions mailing list <regressions@...ts.linux.dev>,
	irogers@...gle.com
Subject: Re: [Regression in 6.19-rc6] Build breakage after commit 436326bc525d

On Tue, Jan 20, 2026 at 09:04:25PM +0100, Rafael J. Wysocki wrote:
>On Tue, Jan 20, 2026 at 8:58 PM Sasha Levin <sashal@...nel.org> wrote:
>>
>> On Tue, Jan 20, 2026 at 07:29:58PM +0100, Rafael J. Wysocki wrote:
>> >On Tue, Jan 20, 2026 at 6:40 PM Sasha Levin <sashal@...nel.org> wrote:
>> >>
>> >> On Tue, Jan 20, 2026 at 11:28:32AM +0100, Peter Zijlstra wrote:
>> >> >On Mon, Jan 19, 2026 at 09:19:31PM +0100, Rafael J. Wysocki wrote:
>> >> >> Hi Sasha,
>> >> >>
>> >> >> Commit 436326bc525d ("objtool: fix build failure due to missing
>> >> >> libopcodes check") breaks kernel build for me.
>> >> >>
>> >> >> Here's what I get when I try to build the kernel after that commit:
>> >> >>
>> >> >>   LD      /scratch/rafael/work/build/xps13/tools/objtool/objtool-in.o
>> >> >>   LINK    /scratch/rafael/work/build/xps13/tools/objtool/objtool
>> >> >> /usr/lib64/gcc/x86_64-suse-linux/15/../../../../x86_64-suse-linux/bin/ld:
>> >> >> /usr/lib64/gcc/x86_64-suse-linux/15/../../../../lib64/libopcodes.a(aarch64-dis.o):
>> >> >> in function `print_operands':
>> >> >> /home/abuild/rpmbuild/BUILD/binutils-2.45/build-dir/opcodes/../../opcodes/aarch64-dis.c:3945:(.text+0x6317):
>> >> >> undefined reference to `xmalloc'
>> >> >> /usr/lib64/gcc/x86_64-suse-linux/15/../../../../x86_64-suse-linux/bin/ld:
>> >> >> /home/abuild/rpmbuild/BUILD/binutils-2.45/build-dir/opcodes/../../opcodes/aarch64-dis.c:3992:(.text+0x6723):
>> >> >> undefined reference to `_sch_istable'
>> >> >> /usr/lib64/gcc/x86_64-suse-linux/15/../../../../x86_64-suse-linux/bin/ld:
>> >> >> /usr/lib64/gcc/x86_64-suse-linux/15/../../../../lib64/libopcodes.a(aarch64-dis.o):
>> >> >> in function `print_insn_aarch64':
>> >> >> /home/abuild/rpmbuild/BUILD/binutils-2.45/build-dir/opcodes/../../opcodes/aarch64-dis.c:4559:(.text+0x6b1e):
>> >> >> undefined reference to `bfd_get_bits'
>> >> >> /usr/lib64/gcc/x86_64-suse-linux/15/../../../../x86_64-suse-linux/bin/ld:
>> >> >> /usr/lib64/gcc/x86_64-suse-linux/15/../../../../lib64/libopcodes.a(aarch64-dis.o):
>> >> >> in function `parse_aarch64_dis_option':
>> >> >> /home/abuild/rpmbuild/BUILD/binutils-2.45/build-dir/opcodes/../../opcodes/aarch64-dis.c:103:(.text+0x6dea):
>> >> >> undefined reference to `_bfd_error_handler'
>> >> >> /usr/lib64/gcc/x86_64-suse-linux/15/../../../../x86_64-suse-linux/bin/ld:
>> >> >> /usr/lib64/gcc/x86_64-suse-linux/15/../../../../lib64/libopcodes.a(aarch64-opc.o):
>> >> >> in function `init_insn_sequence':
>> >> >> /home/abuild/rpmbuild/BUILD/binutils-2.45/build-dir/opcodes/../../opcodes/aarch64-opc.c:5561:(.text+0x5c06):
>> >> >> undefined reference to `xcalloc'
>> >> >> /usr/lib64/gcc/x86_64-suse-linux/15/../../../../x86_64-suse-linux/bin/ld:
>> >> >> /usr/lib64/gcc/x86_64-suse-linux/15/../../../../lib64/libopcodes.a(disassemble.o):
>> >> >> in function `remove_whitespace_and_extra_commas':
>> >> >> /home/abuild/rpmbuild/BUILD/binutils-2.45/build-dir/opcodes/../../opcodes/disassemble.c:801:(.text+0x346):
>> >> >> undefined reference to `_sch_istable'
>> >> >> ...
>> >> >>
>> >> >> (many more similar messages skipped).
>> >> >>
>> >> >> Reverting commit 436326bc525d makes the problem go away.
>> >>
>> >> Thanks for the report Rafael!
>> >>
>> >> Could you confirm that you're linking against static libraries? I haven't
>> >> tested that scenario.
>> >
>> >How do I check that?
>>
>> What do you get running the below?
>>
>>    ls /usr/lib/*/libopcodes*
>
>"No such file or directory"
>
>However,
>
>> ls /usr/lib64/libopcodes*
>/usr/lib64/libopcodes-2.45.0.20251103-150100757.so  /usr/lib64/libopcodes.a

The linker looks for libopcodes.so (not the versioned .so). Without that
symlink, it falls back to libopcodes.a. So yes, looks like you're using static
linking.

To confirm, can you try to:

   sudo ln -s libopcodes-2.45.0.20251103-150100757.so /usr/lib64/libopcodes.so

Any then running the build again?

-- 
Thanks,
Sasha