Safe interop between Rust and C++ (by dtolnay)

Cxx Alternatives

Similar projects and alternatives to cxx

NOTE: The number of mentions on this list indicates mentions on common posts plus user suggested alternatives. Hence, a higher number means a better cxx alternative or higher similarity.

cxx reviews and mentions

Posts with mentions or reviews of cxx. We have used some of these posts to build our list of alternatives and similar projects. The last one was on 2023-12-07.
  • Rust is having a positive effect in C/C++
    2 projects | /r/rust | 7 Dec 2023
    There are cxx and autocxx, what else do you propose to do?
  • Interoperability: Swift’s Super Power
    1 project | | 22 Sep 2023
    I would like to see a comparison of how this compares to Rust. In terms of interoperability it has Cxx ( to offer safe bindings to C++ but also has great support for Android, Linux and many other systems. You don't even need to hack together Windows bindings (as explained in the blog post) because Microsoft offers official bindings ( I'm not sure if I'd call it a superpower if any potential interoperability has to be written to be used (compared to it already being available). Or rather, in comparison to what is interoperability a Swift superpower? Certainly not C++ or C which can be used in a far wider set of targets.
  • Rust Cryptography Should Be Written in Rust
    10 projects | | 26 Aug 2023
    We selected Qt as a cross-platform solution. The C++/Rust interface is the clunkiest and ugliest part of the application, and rather complex because some state is shared between several windows in the GUI and several threads in the backend, and any component might modify that state at any time, and updates have to be transmitted to the other components without introducing inconsistencies. Using cxx [1] helped a little, though.

    The project began in 2020, and I'm not sure what I'd choose as a GUI framework today – definitely not Qt Widgets, though.


  • Link a C static library to rust cargo project
    2 projects | /r/rust | 24 Jun 2023
    If the build process for the C library isn't too involved I recommend using cxx bridge ( and letting cargo handle the build and linking. cxx basically allows you to describe the bidirectional interface (although it sounds like you only need 1 direction, which is fine too) in Rust code and it provides a "good enough" API for compiling C code inside the file.
  • ffizz: Build a Beautiful C API in Rust
    6 projects | | 20 Jun 2023
    The tooling for the first kind -- calling Rust from another language -- is a bit less developed, and tends to rely on code generation that doesn't necessarily produce a natural C API. cbindgen, uniffi, cxx, and Diplomat all take this course.
  • Best practices in creating a Rust API for a C++ library? Seeking advice from those who've done it before.
    7 projects | /r/rust | 26 May 2023
    I would like to utilize OMPL's functionality in Rust code, so I want to call into OMPL C++ code somehow in Rust. I've seen two (non-mutually-exclusive) options so far: - rust-cpp, which allows you to write C++ code in Rust within the cpp!() macro. - cxx, which allows you to define both sides of the FFI boundary manually (as opposed to bindgen's automatic generation).
  • Hey Rustaceans! Got a question? Ask here (20/2023)!
    4 projects | /r/rust | 15 May 2023
    I'm not sure how to do this in cxx; issues like suggest that this isn't settled yet?
  • Hello r/Rust! We are Meta Engineers who created the Open Source Buck2 Build System! Ask us anything! [Mod approved]
    9 projects | /r/rust | 3 May 2023
    I use non-vendored dependencies for the Buck build in
  • Microsoft is rewriting core Windows libraries in Rust
    6 projects | /r/programming | 29 Apr 2023
    There's also the cpp and cxx crates for doing C++/Rust interop, but they probably aren't appropriate to use in all cases. The C ABI is definitely the safest way to go unless you're really trying to marry Rust and C++ code bases, not just writing library bindings.
  • How can I use rust libraries in C++
    2 projects | /r/cpp_questions | 16 Apr 2023
    There's also cxx (can't vouch for it personally but it claims to make things a lot easier)
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Basic cxx repo stats
12 days ago

dtolnay/cxx is an open source project licensed under Apache License 2.0 which is an OSI approved license.

The primary programming language of cxx is Rust.

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