Public bug reported:
Hi,
Ubuntu LTS (24.04)'s `bindgen` is not able to build a kernel with Rust
enabled due to a bug (fixed upstream) in 0.66:
$ bindgen --version --verbose
bindgen 0.66.1
Clang: Ubuntu clang version 18.1.3 (1ubuntu1)
$ make LLVM=1
...
***
*** Rust bindings generator 'bindgen' versions 0.66.0 and 0.66.1 may not
*** work due to a bug (https://github.com/rust-lang/rust-bindgen/pull/2567),
*** unless patched (like Debian's).
*** Your version: 0.66.1
***
***
*** Please see Documentation/rust/quick-start.rst for details
*** on how to set up the Rust support.
***
...
BINDGEN rust/bindings/bindings_generated.rs
panicked at 'called `Result::unwrap()` on an `Err` value:
FromBytesWithNulError { kind: InteriorNul(4) }',
/usr/share/cargo/registry/bindgen-0.66.1/codegen/mod.rs:717:71
The message above comes from a build test we have in the kernel build
system where we test if the bug is present or not:
$ echo '#define A "\0"' >x.h && bindgen x.h
panicked at 'called `Result::unwrap()` on an `Err` value:
FromBytesWithNulError { kind: InteriorNul(0) }',
/usr/share/cargo/registry/bindgen-0.66.1/codegen/mod.rs:717:71
The bug was fixed upstream with:
https://github.com/rust-lang/rust-bindgen/pull/2567
The fix was backported in Debian Testing's `bindgen` package.
It would be nice to have that fixed in Ubuntu's `bindgen` too, so that
users do not need to use e.g. `bindgen-0.65`, which is the current one
we recommend in our instructions:
https://docs.kernel.org/next/rust/quick-start.html#ubuntu
Thanks!
Cheers,
Miguel
** Affects: rust-bindgen-cli (Ubuntu)
Importance: Undecided
Status: New
** Tags: fixed-upstream patch
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https://bugs.launchpad.net/bugs/2086641
Title:
bindgen: kernel build failure due to 0.66 bug (fixed upstream)
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