| <!DOCTYPE html><html lang="en"><head><meta charset="utf-8"><meta name="viewport" content="width=device-width, initial-scale=1.0"><meta name="generator" content="rustdoc"><meta name="description" content="Source to the Rust file `crates/std_detect/src/lib.rs`."><meta name="keywords" content="rust, rustlang, rust-lang"><title>lib.rs.html -- source</title><link rel="stylesheet" type="text/css" href="../../normalize.css"><link rel="stylesheet" type="text/css" href="../../rustdoc.css" id="mainThemeStyle"><link rel="stylesheet" type="text/css" href="../../dark.css"><link rel="stylesheet" type="text/css" href="../../light.css" id="themeStyle"><script src="../../storage.js"></script><noscript><link rel="stylesheet" href="../../noscript.css"></noscript><link rel="shortcut icon" href="../../favicon.ico"><style type="text/css">#crate-search{background-image:url("../../down-arrow.svg");}</style></head><body class="rustdoc source"><!--[if lte IE 8]><div class="warning">This old browser is unsupported and will most likely display funky things.</div><![endif]--><nav class="sidebar"><div class="sidebar-menu">☰</div><a href='../../std_detect/index.html'><div class='logo-container'><img src='../../rust-logo.png' alt='logo'></div></a></nav><div class="theme-picker"><button id="theme-picker" aria-label="Pick another theme!"><img src="../../brush.svg" width="18" alt="Pick another theme!"></button><div id="theme-choices"></div></div><script src="../../theme.js"></script><nav class="sub"><form class="search-form js-only"><div class="search-container"><div><select id="crate-search"><option value="All crates">All crates</option></select><input class="search-input" name="search" autocomplete="off" spellcheck="false" placeholder="Click or press ‘S’ to search, ‘?’ for more options…" type="search"></div><a id="settings-menu" href="../../settings.html"><img src="../../wheel.svg" width="18" alt="Change settings"></a></div></form></nav><section id="main" class="content"><pre class="line-numbers"><span id="1"> 1</span> |
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| </pre><div class="example-wrap"><pre class="rust "> |
| <span class="doccomment">//! Run-time feature detection for the Rust standard library.</span> |
| <span class="doccomment">//!</span> |
| <span class="doccomment">//! To detect whether a feature is enabled in the system running the binary</span> |
| <span class="doccomment">//! use one of the appropriate macro for the target:</span> |
| <span class="doccomment">//!</span> |
| <span class="doccomment">//! * `x86` and `x86_64`: [`is_x86_feature_detected`]</span> |
| <span class="doccomment">//! * `arm`: [`is_arm_feature_detected`]</span> |
| <span class="doccomment">//! * `aarch64`: [`is_aarch64_feature_detected`]</span> |
| <span class="doccomment">//! * `mips`: [`is_mips_feature_detected`]</span> |
| <span class="doccomment">//! * `mips64`: [`is_mips64_feature_detected`]</span> |
| <span class="doccomment">//! * `powerpc`: [`is_powerpc_feature_detected`]</span> |
| <span class="doccomment">//! * `powerpc64`: [`is_powerpc64_feature_detected`]</span> |
| |
| <span class="attribute">#![<span class="ident">unstable</span>(<span class="ident">feature</span> <span class="op">=</span> <span class="string">"stdsimd"</span>, <span class="ident">issue</span> <span class="op">=</span> <span class="string">"27731"</span>)]</span> |
| <span class="attribute">#![<span class="ident">feature</span>(<span class="ident">const_fn</span>, <span class="ident">staged_api</span>, <span class="ident">stdsimd</span>, <span class="ident">doc_cfg</span>, <span class="ident">allow_internal_unstable</span>)]</span> |
| <span class="attribute">#![<span class="ident">allow</span>(<span class="ident">clippy</span>::<span class="ident">shadow_reuse</span>)]</span> |
| <span class="attribute">#![<span class="ident">deny</span>(<span class="ident">clippy</span>::<span class="ident">missing_inline_in_public_items</span>)]</span> |
| <span class="attribute">#![<span class="ident">cfg_attr</span>(<span class="ident">target_os</span> <span class="op">=</span> <span class="string">"linux"</span>, <span class="ident">feature</span>(<span class="ident">linkage</span>))]</span> |
| <span class="attribute">#![<span class="ident">cfg_attr</span>(<span class="ident">all</span>(<span class="ident">target_os</span> <span class="op">=</span> <span class="string">"freebsd"</span>, <span class="ident">target_arch</span> <span class="op">=</span> <span class="string">"aarch64"</span>), <span class="ident">feature</span>(<span class="ident">asm</span>))]</span> |
| <span class="attribute">#![<span class="ident">cfg_attr</span>(<span class="ident">test</span>, <span class="ident">allow</span>(<span class="ident">unused_imports</span>))]</span> |
| <span class="attribute">#![<span class="ident">no_std</span>]</span> |
| |
| <span class="attribute">#[<span class="ident">macro_use</span>]</span> |
| <span class="kw">extern</span> <span class="kw">crate</span> <span class="ident">cfg_if</span>; |
| |
| <span class="macro">cfg_if</span><span class="macro">!</span> { |
| <span class="kw">if</span> <span class="attribute">#[<span class="ident">cfg</span>(<span class="ident">feature</span> <span class="op">=</span> <span class="string">"std_detect_file_io"</span>)]</span> { |
| <span class="attribute">#[<span class="ident">cfg_attr</span>(<span class="ident">test</span>, <span class="ident">macro_use</span>(<span class="ident">println</span>))]</span> |
| <span class="kw">extern</span> <span class="kw">crate</span> <span class="ident">std</span>; |
| |
| <span class="attribute">#[<span class="ident">allow</span>(<span class="ident">unused_imports</span>)]</span> |
| <span class="kw">use</span> <span class="ident">std</span>::{<span class="ident">arch</span>, <span class="ident">fs</span>, <span class="ident">io</span>, <span class="ident">mem</span>, <span class="ident">sync</span>}; |
| } <span class="kw">else</span> { |
| <span class="attribute">#[<span class="ident">cfg</span>(<span class="ident">test</span>)]</span> |
| <span class="attribute">#[<span class="ident">macro_use</span>(<span class="ident">println</span>)]</span> |
| <span class="kw">extern</span> <span class="kw">crate</span> <span class="ident">std</span>; |
| |
| <span class="attribute">#[<span class="ident">allow</span>(<span class="ident">unused_imports</span>)]</span> |
| <span class="kw">use</span> <span class="ident">core</span>::{<span class="ident">arch</span>, <span class="ident">mem</span>, <span class="ident">sync</span>}; |
| } |
| } |
| |
| <span class="attribute">#[<span class="ident">cfg</span>(<span class="ident">feature</span> <span class="op">=</span> <span class="string">"std_detect_dlsym_getauxval"</span>)]</span> |
| <span class="kw">extern</span> <span class="kw">crate</span> <span class="ident">libc</span>; |
| |
| <span class="attribute">#[<span class="ident">doc</span>(<span class="ident">hidden</span>)]</span> |
| <span class="attribute">#[<span class="ident">unstable</span>(<span class="ident">feature</span> <span class="op">=</span> <span class="string">"stdsimd"</span>, <span class="ident">issue</span> <span class="op">=</span> <span class="string">"27731"</span>)]</span> |
| <span class="kw">pub</span> <span class="kw">mod</span> <span class="ident">detect</span>; |
| </pre></div> |
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