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

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Message-ID: <CAJZ5v0h11g4jcXghK4FL=di4jirYDwMcf1m=k7E=Jpc5VobciA@mail.gmail.com>
Date: Tue, 20 Jan 2026 22:33:12 +0100
From: "Rafael J. Wysocki" <rafael@...nel.org>
To: Sasha Levin <sashal@...nel.org>
Cc: "Rafael J. Wysocki" <rafael@...nel.org>, 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 9:22 PM Sasha Levin <sashal@...nel.org> wrote:
>
> 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?

Yes, this makes the build work (without reverting the commit in question).