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981ad93c89
`bindgen` versions 0.66.0 and 0.66.1 panic due to C string literals with
NUL characters [1]:
panicked at .cargo/registry/src/index.crates.io-6f17d22bba15001f/bindgen-0.66.0/codegen/mod.rs:717:71:
called `Result::unwrap()` on an `Err` value: FromBytesWithNulError { kind: InteriorNul(4) }
Thus, in preparation for supporting several `bindgen` versions, add a
version check to warn the user about it.
Since some distributions may have patched it (e.g. Debian did [2]),
check if that seems to be the case (after the version check matches),
in order to avoid printing a warning in that case.
We could make it an error, but 1) it is going to fail anyway later
in the build, 2) we would disable `RUST`, which is also painful, 3)
someone could have patched it in a way that still makes our extra check
fail (however unlikely), 4) the interior NUL may go away in the headers
(however unlikely). Thus just warn about it so that users know why it
is failing.
In addition, add a couple tests for the new cases.
Link: https://github.com/rust-lang/rust-bindgen/pull/2567 [1]
Link: https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=1069047 [2]
Link: https://lore.kernel.org/r/20240709160615.998336-11-ojeda@kernel.org
Signed-off-by: Miguel Ojeda <ojeda@kernel.org>
Linux kernel
============
There are several guides for kernel developers and users. These guides can
be rendered in a number of formats, like HTML and PDF. Please read
Documentation/admin-guide/README.rst first.
In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``. The formatted documentation can also be read online at:
https://www.kernel.org/doc/html/latest/
There are various text files in the Documentation/ subdirectory,
several of them using the reStructuredText markup notation.
Please read the Documentation/process/changes.rst file, as it contains the
requirements for building and running the kernel, and information about
the problems which may result by upgrading your kernel.