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</pre><pre class="rust ">
<span class="attribute">#[<span class="ident">cfg</span>(<span class="ident">any</span>(<span class="ident">target_os</span> <span class="op">=</span> <span class="string">&quot;freebsd&quot;</span>, <span class="ident">target_os</span> <span class="op">=</span> <span class="string">&quot;dragonfly&quot;</span>, <span class="ident">target_os</span> <span class="op">=</span> <span class="string">&quot;ios&quot;</span>,
<span class="ident">target_os</span> <span class="op">=</span> <span class="string">&quot;netbsd&quot;</span>, <span class="ident">target_os</span> <span class="op">=</span> <span class="string">&quot;macos&quot;</span>, <span class="ident">target_os</span> <span class="op">=</span> <span class="string">&quot;linux&quot;</span>))]</span>
<span class="kw">pub</span> <span class="kw">mod</span> <span class="ident">aio</span>;
<span class="attribute">#[<span class="ident">cfg</span>(<span class="ident">any</span>(<span class="ident">target_os</span> <span class="op">=</span> <span class="string">&quot;linux&quot;</span>, <span class="ident">target_os</span> <span class="op">=</span> <span class="string">&quot;android&quot;</span>))]</span>
<span class="kw">pub</span> <span class="kw">mod</span> <span class="ident">epoll</span>;
<span class="attribute">#[<span class="ident">cfg</span>(<span class="ident">any</span>(<span class="ident">target_os</span> <span class="op">=</span> <span class="string">&quot;macos&quot;</span>, <span class="ident">target_os</span> <span class="op">=</span> <span class="string">&quot;ios&quot;</span>, <span class="ident">target_os</span> <span class="op">=</span> <span class="string">&quot;freebsd&quot;</span>,
<span class="ident">target_os</span> <span class="op">=</span> <span class="string">&quot;dragonfly&quot;</span>, <span class="ident">target_os</span> <span class="op">=</span> <span class="string">&quot;openbsd&quot;</span>, <span class="ident">target_os</span> <span class="op">=</span> <span class="string">&quot;netbsd&quot;</span>))]</span>
<span class="kw">pub</span> <span class="kw">mod</span> <span class="ident">event</span>;
<span class="comment">// TODO: switch from feature flags to conditional builds</span>
<span class="attribute">#[<span class="ident">cfg</span>(<span class="ident">feature</span> <span class="op">=</span> <span class="string">&quot;eventfd&quot;</span>)]</span>
<span class="kw">pub</span> <span class="kw">mod</span> <span class="ident">eventfd</span>;
<span class="attribute">#[<span class="ident">cfg</span>(<span class="ident">target_os</span> <span class="op">=</span> <span class="string">&quot;linux&quot;</span>)]</span>
<span class="kw">pub</span> <span class="kw">mod</span> <span class="ident">memfd</span>;
<span class="attribute">#[<span class="ident">macro_use</span>]</span>
<span class="kw">pub</span> <span class="kw">mod</span> <span class="ident">ioctl</span>;
<span class="attribute">#[<span class="ident">cfg</span>(<span class="ident">any</span>(<span class="ident">target_os</span> <span class="op">=</span> <span class="string">&quot;linux&quot;</span>, <span class="ident">target_os</span> <span class="op">=</span> <span class="string">&quot;android&quot;</span>))]</span>
<span class="kw">pub</span> <span class="kw">mod</span> <span class="ident">sendfile</span>;
<span class="kw">pub</span> <span class="kw">mod</span> <span class="ident">signal</span>;
<span class="attribute">#[<span class="ident">cfg</span>(<span class="ident">any</span>(<span class="ident">target_os</span> <span class="op">=</span> <span class="string">&quot;linux&quot;</span>, <span class="ident">target_os</span> <span class="op">=</span> <span class="string">&quot;android&quot;</span>))]</span>
<span class="attribute">#[<span class="ident">cfg</span>(<span class="ident">feature</span> <span class="op">=</span> <span class="string">&quot;signalfd&quot;</span>)]</span>
<span class="kw">pub</span> <span class="kw">mod</span> <span class="ident">signalfd</span>;
<span class="kw">pub</span> <span class="kw">mod</span> <span class="ident">socket</span>;
<span class="kw">pub</span> <span class="kw">mod</span> <span class="ident">stat</span>;
<span class="attribute">#[<span class="ident">cfg</span>(<span class="ident">any</span>(<span class="ident">target_os</span> <span class="op">=</span> <span class="string">&quot;linux&quot;</span>, <span class="ident">target_os</span> <span class="op">=</span> <span class="string">&quot;android&quot;</span>))]</span>
<span class="kw">pub</span> <span class="kw">mod</span> <span class="ident">syscall</span>;
<span class="attribute">#[<span class="ident">cfg</span>(<span class="ident">any</span>(<span class="ident">target_os</span> <span class="op">=</span> <span class="string">&quot;linux&quot;</span>))]</span>
<span class="kw">pub</span> <span class="kw">mod</span> <span class="ident">reboot</span>;
<span class="attribute">#[<span class="ident">cfg</span>(<span class="ident">not</span>(<span class="ident">target_os</span> <span class="op">=</span> <span class="string">&quot;ios&quot;</span>))]</span>
<span class="kw">pub</span> <span class="kw">mod</span> <span class="ident">termios</span>;
<span class="attribute">#[<span class="ident">cfg</span>(<span class="ident">any</span>(<span class="ident">target_os</span> <span class="op">=</span> <span class="string">&quot;linux&quot;</span>, <span class="ident">target_os</span> <span class="op">=</span> <span class="string">&quot;android&quot;</span>))]</span>
<span class="kw">pub</span> <span class="kw">mod</span> <span class="ident">utsname</span>;
<span class="kw">pub</span> <span class="kw">mod</span> <span class="ident">wait</span>;
<span class="kw">pub</span> <span class="kw">mod</span> <span class="ident">mman</span>;
<span class="kw">pub</span> <span class="kw">mod</span> <span class="ident">uio</span>;
<span class="kw">pub</span> <span class="kw">mod</span> <span class="ident">time</span>;
<span class="attribute">#[<span class="ident">cfg</span>(<span class="ident">all</span>(<span class="ident">target_os</span> <span class="op">=</span> <span class="string">&quot;linux&quot;</span>,
<span class="ident">any</span>(<span class="ident">target_arch</span> <span class="op">=</span> <span class="string">&quot;x86&quot;</span>,
<span class="ident">target_arch</span> <span class="op">=</span> <span class="string">&quot;x86_64&quot;</span>,
<span class="ident">target_arch</span> <span class="op">=</span> <span class="string">&quot;arm&quot;</span>)),
)]</span>
<span class="kw">pub</span> <span class="kw">mod</span> <span class="ident">ptrace</span>;
<span class="kw">pub</span> <span class="kw">mod</span> <span class="ident">select</span>;
<span class="attribute">#[<span class="ident">cfg</span>(<span class="ident">all</span>(<span class="ident">target_os</span> <span class="op">=</span> <span class="string">&quot;linux&quot;</span>,
<span class="ident">any</span>(<span class="ident">target_arch</span> <span class="op">=</span> <span class="string">&quot;x86&quot;</span>,
<span class="ident">target_arch</span> <span class="op">=</span> <span class="string">&quot;x86_64&quot;</span>,
<span class="ident">target_arch</span> <span class="op">=</span> <span class="string">&quot;arm&quot;</span>)),
)]</span>
<span class="kw">pub</span> <span class="kw">mod</span> <span class="ident">quota</span>;
<span class="attribute">#[<span class="ident">cfg</span>(<span class="ident">all</span>(<span class="ident">target_os</span> <span class="op">=</span> <span class="string">&quot;linux&quot;</span>,
<span class="ident">any</span>(<span class="ident">target_arch</span> <span class="op">=</span> <span class="string">&quot;x86&quot;</span>,
<span class="ident">target_arch</span> <span class="op">=</span> <span class="string">&quot;x86_64&quot;</span>,
<span class="ident">target_arch</span> <span class="op">=</span> <span class="string">&quot;arm&quot;</span>)),
)]</span>
<span class="kw">pub</span> <span class="kw">mod</span> <span class="ident">statfs</span>;
<span class="attribute">#[<span class="ident">cfg</span>(<span class="ident">all</span>(<span class="ident">any</span>(<span class="ident">target_os</span> <span class="op">=</span> <span class="string">&quot;linux&quot;</span>,
<span class="ident">target_os</span> <span class="op">=</span> <span class="string">&quot;macos&quot;</span>),
<span class="ident">any</span>(<span class="ident">target_arch</span> <span class="op">=</span> <span class="string">&quot;x86&quot;</span>,
<span class="ident">target_arch</span> <span class="op">=</span> <span class="string">&quot;x86_64&quot;</span>,
<span class="ident">target_arch</span> <span class="op">=</span> <span class="string">&quot;arm&quot;</span>)),
)]</span>
<span class="kw">pub</span> <span class="kw">mod</span> <span class="ident">statvfs</span>;
</pre>
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