From 61a14fcea05f8e9a544a5557b98633f7ace65109 Mon Sep 17 00:00:00 2001 From: Trevor Gross Date: Tue, 6 May 2025 20:11:48 +0000 Subject: Require `target_has_atomic = "ptr"` for runtime feature detection The `feature_detect` module is currently being built on all targets, but the use of `AtomicU32` causes a problem if atomics are not available (such as with `bpfel-unknown-none`). Gate this module behind `target_has_atomic = "ptr"`. The below now completes successfully: cargo build -p compiler_builtins --target=bpfel-unknown-none -Z build-std=core Fixes: https://github.com/rust-lang/compiler-builtins/issues/908 --- library/compiler-builtins/libm/src/math/support/mod.rs | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-) (limited to 'library/compiler-builtins/libm/src/math/support/mod.rs') diff --git a/library/compiler-builtins/libm/src/math/support/mod.rs b/library/compiler-builtins/libm/src/math/support/mod.rs index 727b9a360e2..a4f596ab844 100644 --- a/library/compiler-builtins/libm/src/math/support/mod.rs +++ b/library/compiler-builtins/libm/src/math/support/mod.rs @@ -2,7 +2,9 @@ pub mod macros; mod big; mod env; -mod feature_detect; +// Runtime feature detection requires atomics. +#[cfg(target_has_atomic = "ptr")] +pub(crate) mod feature_detect; mod float_traits; pub mod hex_float; mod int_traits; @@ -11,8 +13,6 @@ mod int_traits; pub use big::{i256, u256}; pub use env::{FpResult, Round, Status}; #[allow(unused_imports)] -pub(crate) use feature_detect::{Flags, get_or_init_flags_cache, select_once, unique_masks}; -#[allow(unused_imports)] pub use float_traits::{DFloat, Float, HFloat, IntTy}; pub(crate) use float_traits::{f32_from_bits, f64_from_bits}; #[cfg(f16_enabled)] -- cgit 1.4.1-3-g733a5