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| author | Trevor Gross <tmgross@umich.edu> | 2025-05-06 20:11:48 +0000 |
|---|---|---|
| committer | Trevor Gross <t.gross35@gmail.com> | 2025-05-06 17:59:03 -0400 |
| commit | 61a14fcea05f8e9a544a5557b98633f7ace65109 (patch) | |
| tree | 80002d1486286bea774c8eca21f3da1eaf33f5b6 /library/compiler-builtins/libm/src/math/support/mod.rs | |
| parent | 339793d62b4c455f2a8268e09f85ee471cd4847c (diff) | |
| download | rust-61a14fcea05f8e9a544a5557b98633f7ace65109.tar.gz rust-61a14fcea05f8e9a544a5557b98633f7ace65109.zip | |
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
Diffstat (limited to 'library/compiler-builtins/libm/src/math/support/mod.rs')
| -rw-r--r-- | library/compiler-builtins/libm/src/math/support/mod.rs | 6 |
1 files changed, 3 insertions, 3 deletions
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)] |