src/stdsimd/crates/std_detect/src/lib.rs

   1 //! Run-time feature detection for the Rust standard library.
   2 //!
   3 //! To detect whether a feature is enabled in the system running the binary
   4 //! use one of the appropriate macro for the target:
   5 //!
   6 //! * `x86` and `x86_64`: [`is_x86_feature_detected`]
   7 //! * `arm`: [`is_arm_feature_detected`]
   8 //! * `aarch64`: [`is_aarch64_feature_detected`]
   9 //! * `mips`: [`is_mips_feature_detected`]
  10 //! * `mips64`: [`is_mips64_feature_detected`]
  11 //! * `powerpc`: [`is_powerpc_feature_detected`]
  12 //! * `powerpc64`: [`is_powerpc64_feature_detected`]
  13
  14 #![unstable(feature = "stdsimd", issue = "27731")]
  15 #![feature(const_fn, staged_api, stdsimd, doc_cfg, allow_internal_unstable)]
  16 #![cfg_attr(feature = "cargo-clippy", allow(clippy::shadow_reuse))]
  17 #![cfg_attr(
  18     feature = "cargo-clippy",
  19     deny(clippy::missing_inline_in_public_items,)
  20 )]
  21 #![cfg_attr(target_os = "linux", feature(linkage))]
  22 #![cfg_attr(all(target_os = "freebsd", target_arch = "aarch64"), feature(asm))]
  23 #![cfg_attr(stdsimd_strict, deny(warnings))]
  24 #![cfg_attr(test, allow(unused_imports))]
  25 #![no_std]
  26
  27 #[macro_use]
  28 extern crate cfg_if;
  29
  30 cfg_if! {
  31     if #[cfg(feature = "std_detect_file_io")] {
  32         #[cfg_attr(test, macro_use(println))]
  33         extern crate std;
  34
  35         #[allow(unused_imports)]
  36         use std::{arch, fs, io, mem, sync};
  37     } else {
  38         #[cfg(test)]
  39         #[macro_use(println)]
  40         extern crate std;
  41
  42         #[allow(unused_imports)]
  43         use core::{arch, mem, sync};
  44     }
  45 }
  46
  47 #[cfg(feature = "std_detect_dlsym_getauxval")]
  48 extern crate libc;
  49
  50 #[doc(hidden)]
  51 #[unstable(feature = "stdsimd", issue = "27731")]
  52 pub mod detect;