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tokio: assert platform-minimum requirements at build time (#3797)

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John-John Tedro 2021-10-19 15:16:45 +02:00 committed by GitHub
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commit 44e9013f64
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tokio/src/lib.rs
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@ -350,6 +350,19 @@
//! //!
//! [feature flags]: https://doc.rust-lang.org/cargo/reference/manifest.html#the-features-section //! [feature flags]: https://doc.rust-lang.org/cargo/reference/manifest.html#the-features-section
// Test that pointer width is compatible. This asserts that e.g. usize is at
// least 32 bits, which a lot of components in Tokio currently assumes.
//
// TODO: improve once we have MSRV access to const eval to make more flexible.
#[cfg(not(any(
target_pointer_width = "32",
target_pointer_width = "64",
target_pointer_width = "128"
)))]
compile_error! {
"Tokio requires the platform pointer width to be 32, 64, or 128 bits"
}
// Includes re-exports used by macros. // Includes re-exports used by macros.
// //
// This module is not intended to be part of the public API. In general, any // This module is not intended to be part of the public API. In general, any