Will Rust drop dependency on libc and make direct system calls? when ? (Please don't mention no_std case)

• rustix

  15 1,318 9.4 Rust

  Safe Rust bindings to POSIX-ish APIs

  

rustix can make syscalls directly to Linux. There's a rustc fork that can use it to build std.

• windows-rs

  97 9,812 7.7 Rust

  Rust for Windows

  

Windows: Syscalls are undocumented and unstable, and it is in fact impossible to compile any native code for Windows without linking against proprietary lib files ("import library" in Windows lingo). That said, there is a new feature #[link(kind="raw-dylib")] that allows windows-rs crate to link against dlls directly instead of using compile time import libraries: https://github.com/microsoft/windows-rs/pull/977. This is as "native" as you can get on Windows.

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• chrono

  23 3,114 9.7 Rust

  Date and time library for Rust (by chronotope)

  

libc isn't "just a wrapper". Is a massive legacy codebase filled with hacks, UBs and bugs: https://github.com/chronotope/chrono/issues/499

• mpv

  830 25,874 9.9 C

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• fls

  2 37 5.8 Rust

  fastest ls in the west

And then there are some interfaces in libc that just look absolutely nothing like the system APIs. In libc, if you want to list the contents of a directory you call opendir then repeatedly call readdir to get a pointer to the next entry in the directory. But behind readdir is an array of directory entry types. So if you're implementing something like ls on top of libc, in most cases you end up dominated by small inefficiencies like that. I wrote this basically to see how big that effect is, the answer is somewhere around 2x: https://github.com/saethlin/fls

• go

  2,067 119,397 10.0 Go

  The Go programming language

  

This was one of them https://github.com/golang/go/issues/6719

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