The
build.rs file’s main function is a build script that configures the Rust compiler to link against the dynamic library by telling cargo through standard output (print).- dynamic library path:
cargo:rustc-link-search=native=$PATH
- dynamic library name:
cargo:rustc-link-lib=dylib=$NAME
Bindgen
- library path
- wrapper header path
- output binding rust file
build.rs binding in lib.rs
lib.rsfile can include the generated bindings and allows the Rust code to interact with the C functions.
- The
#![allow(...)]attributes are used to suppress warnings about naming conventions.
include!(concat!(env!("OUT_DIR"), "/bindings.rs"));: This line includes the generated bindings file, which is created by bindgen during the build process.
Source code usage
- The
extern "C"block declares theimage_classifierfunction from the Darknet library, making it available for use in Rust.
- This function can be called from the Rust code as if it were a normal Rust function.