rusto-mnn-sys 0.2.0

Low-level FFI bindings to MNN library
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MNN-sys

Low-level FFI bindings for the MNN (Mobile Neural Network) library.

Overview

This crate provides unsafe C bindings to MNN through a custom C wrapper layer. It is not intended to be used directly - use the mnn crate instead for safe, idiomatic Rust bindings.

Building

Requirements

  • CMake 3.10 or higher
  • C++11 compatible compiler (GCC 4.8+, Clang 3.3+, MSVC 2015+)
  • Platform-specific dependencies:
    • macOS/iOS: Xcode with Metal SDK
    • Linux: Standard build tools
    • Android: NDK

Build Process

The build script (build.rs) performs the following:

  1. Compiles MNN from the vendored source using CMake
  2. Compiles the C wrapper (mnn_wrapper.cpp)
  3. Generates Rust bindings using bindgen
  4. Links everything together

The build is configured for static linking by default to ensure the binaries are self-contained.

Platform Configuration

The build script automatically enables platform-specific backends:

  • macOS/iOS: Metal, CoreML
  • Linux: OpenCL
  • Android: OpenCL

License

MNN is licensed under Apache 2.0. See the vendor/mnn directory for details.