build error of rust ordered/unordered sections mismatch

build error of rust ordered/unordered sections mismatch

[Wang Yugui]

Hi,

When I build kernel 6.18.60 and 1.68.62(maybe more versions),  a build error
happended.

ld: __patchable_function_entries has both ordered [`__patchable_function_entries'
in rust/core.o] and unordered [`__patchable_function_entries' in
io_uring/fdinfo.o] sections

# rustc -V
rustc 1.92.0 (ded5c06cf 2025-12-08) (Red Hat 1.92.0-1.module+el8.10.0+40191+971f4d77)
# bindgen -V
bindgen 0.72.1
# gcc --version
gcc (GCC) 8.5.0 20210514 (Red Hat 8.5.0-30)

But kernel 7.4.0-rc1 is built well on this server.

any advice please.

Best Regards
Wang Yugui (wangyugui@e16-tech.com)
2026/11/09

Re: build error of rust ordered/unordered sections mismatch

[Gary Guo]

On Sun Nov 8, 2026 at 11:47 PM GMT, Wang Yugui wrote:
> Hi,
>
> When I build kernel 6.18.60 and 1.68.62(maybe more versions),  a build error
> happended.
>
> ld: __patchable_function_entries has both ordered [`__patchable_function_entries'
> in rust/core.o] and unordered [`__patchable_function_entries' in
> io_uring/fdinfo.o] sections
>
> # rustc -V
> rustc 1.92.0 (ded5c06cf 2025-12-08) (Red Hat 1.92.0-1.module+el8.10.0+40191+971f4d77)
> # bindgen -V
> bindgen 0.72.1
> # gcc --version
> gcc (GCC) 8.5.0 20210514 (Red Hat 8.5.0-30)
>
> But kernel 7.4.0-rc1 is built well on this server.
>
> any advice please.

LLVM emits SHF_LINK_ORDER for patchable function entry section:
https://github.com/llvm/llvm-project/blob/main/llvm/lib/CodeGen/AsmPrinter/AsmPrinter.cpp#L5232-L5252

You can try building the full kernel with LLVM toolchain (LLVM=1) or update the
binutils to 2.36.

Best,
Gary