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The kernel builds `core` with the `no_fp_fmt_parse` `--cfg`, which means
we do not have support for formatting floating point primitives. However,
`zerocopy` expects those implementations to exist:
error[E0277]: `f32` doesn't implement `core::fmt::Display`
--> rust/zerocopy/src/byteorder.rs:172:29
|
172 | $trait::fmt(&self.get(), f)
| ----------- ^^^^^^^^^^^ the trait `core::fmt::Display` is not implemented for `f32`
| |
| required by a bound introduced by this call
...
907 | / define_type!(
908 | | An,
909 | | "A 32-bit floating point number",
910 | | F32,
... |
922 | | []
923 | | );
| |_- in this macro invocation
|
= help: the following other types implement trait `core::fmt::Display`:
i128
i16
i32
i64
i8
isize
u128
u16
and 4 others
= note: this error originates in the macro `impl_fmt_trait` which comes from the expansion of the macro `define_type` (in Nightly builds, run with -Z macro-backtrace for more info)
Thus work around it by skipping those implementations in `zerocopy`.
Ideally, `zerocopy` would have the equivalent of `no_fp_fmt_parse`;
and, indeed, upstream just added it [1] after I filed an issue [2]
about it as requested. We can try it in a future update of our
vendored copy.
Cc: Joshua Liebow-Feeser <joshlf@google.com>
Cc: Jack Wrenn <jswrenn@google.com>
Link: https://github.com/google/zerocopy/pull/3429 [1]
Link: https://github.com/google/zerocopy/issues/3426 [2]
Link: https://patch.msgid.link/20260608141439.182634-11-ojeda@kernel.org
Signed-off-by: Miguel Ojeda <ojeda@kernel.org>
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| .. | ||
| bindings | ||
| helpers | ||
| kernel | ||
| macros | ||
| pin-init | ||
| proc-macro2 | ||
| quote | ||
| syn | ||
| uapi | ||
| zerocopy | ||
| .gitignore | ||
| .kunitconfig | ||
| bindgen_parameters | ||
| build_error.rs | ||
| compiler_builtins.rs | ||
| exports.c | ||
| ffi.rs | ||
| Makefile | ||