| Message ID | 20240808221138.873750-7-ojeda@kernel.org (mailing list archive) |
|---|---|
| State | New |
| Headers | show |
| Series | kbuild: rust: add `RUSTC_VERSION` and reconfig/rebuild support | expand |
diff --git a/Documentation/rust/general-information.rst b/Documentation/rust/general-information.rst index e3f388ef4ee4..071c5bafd668 100644 --- a/Documentation/rust/general-information.rst +++ b/Documentation/rust/general-information.rst @@ -142,3 +142,11 @@ configuration: #[cfg(CONFIG_X="y")] // Enabled as a built-in (`y`) #[cfg(CONFIG_X="m")] // Enabled as a module (`m`) #[cfg(not(CONFIG_X))] // Disabled + +For other predicates that Rust's ``cfg`` does not support, e.g. expressions with +numerical comparisons, one may define a new Kconfig symbol: + +.. code-block:: kconfig + + config RUSTC_VERSION_MIN_107900 + def_bool y if RUSTC_VERSION >= 107900
Expand the conditional compilation section to explain how to support other expressions, such as testing whether `RUSTC_VERSION` is at least a given version, which requires a numerical comparison that Rust's `cfg` predicates do not support (yet?). Signed-off-by: Miguel Ojeda <ojeda@kernel.org> --- Documentation/rust/general-information.rst | 8 ++++++++ 1 file changed, 8 insertions(+)